From ffcff0fa618c07270db8ae28633aa8467a346148 Mon Sep 17 00:00:00 2001
From: Kugel Fuhr <98353208+kugelfuhr@users.noreply.github.com>
Date: Fri, 4 Jul 2025 17:11:34 +0200
Subject: [PATCH 01/13] Much improved error messages for ca65. For most errors
 it will now say what was expected and what was found instead. Also improved
 error recovery in a few places.

---
 test/asm/listing/130-errormsg.s        | 1 -
 test/asm/listing/ref/120-errormsg.err2 | 1 +
 test/asm/listing/ref/121-errormsg.err2 | 1 +
 test/asm/listing/ref/122-errormsg.err2 | 1 +
 test/asm/listing/ref/123-errormsg.err2 | 1 +
 test/asm/listing/ref/124-errormsg.err2 | 1 +
 test/asm/listing/ref/125-errormsg.err2 | 2 ++
 test/asm/listing/ref/126-errormsg.err2 | 1 +
 test/asm/listing/ref/127-errormsg.err2 | 1 +
 test/asm/listing/ref/128-errormsg.err2 | 1 +
 test/asm/listing/ref/129-errormsg.err2 | 1 +
 test/asm/listing/ref/130-errormsg.err2 | 2 ++
 test/asm/listing/ref/131-errormsg.err2 | 1 +
 13 files changed, 14 insertions(+), 1 deletion(-)
 create mode 100644 test/asm/listing/ref/120-errormsg.err2
 create mode 100644 test/asm/listing/ref/121-errormsg.err2
 create mode 100644 test/asm/listing/ref/122-errormsg.err2
 create mode 100644 test/asm/listing/ref/123-errormsg.err2
 create mode 100644 test/asm/listing/ref/124-errormsg.err2
 create mode 100644 test/asm/listing/ref/125-errormsg.err2
 create mode 100644 test/asm/listing/ref/126-errormsg.err2
 create mode 100644 test/asm/listing/ref/127-errormsg.err2
 create mode 100644 test/asm/listing/ref/128-errormsg.err2
 create mode 100644 test/asm/listing/ref/129-errormsg.err2
 create mode 100644 test/asm/listing/ref/130-errormsg.err2
 create mode 100644 test/asm/listing/ref/131-errormsg.err2

diff --git a/test/asm/listing/130-errormsg.s b/test/asm/listing/130-errormsg.s
index eb85bc0e1..a5a40156f 100644
--- a/test/asm/listing/130-errormsg.s
+++ b/test/asm/listing/130-errormsg.s
@@ -1,2 +1 @@
         lda     |
-
diff --git a/test/asm/listing/ref/120-errormsg.err2 b/test/asm/listing/ref/120-errormsg.err2
new file mode 100644
index 000000000..ac78914e0
--- /dev/null
+++ b/test/asm/listing/ref/120-errormsg.err2
@@ -0,0 +1 @@
+120-errormsg.s:1: Error: Expected 'end-of-line' but found '0'
diff --git a/test/asm/listing/ref/121-errormsg.err2 b/test/asm/listing/ref/121-errormsg.err2
new file mode 100644
index 000000000..abc16d4d5
--- /dev/null
+++ b/test/asm/listing/ref/121-errormsg.err2
@@ -0,0 +1 @@
+121-errormsg.s:1: Error: Expected ':' after identifier to form a label but found 'end-of-line'
diff --git a/test/asm/listing/ref/122-errormsg.err2 b/test/asm/listing/ref/122-errormsg.err2
new file mode 100644
index 000000000..692ac0cc6
--- /dev/null
+++ b/test/asm/listing/ref/122-errormsg.err2
@@ -0,0 +1 @@
+122-errormsg.s:1: Error: Expected a struct/union name but found 'X'
diff --git a/test/asm/listing/ref/123-errormsg.err2 b/test/asm/listing/ref/123-errormsg.err2
new file mode 100644
index 000000000..f7db86f47
--- /dev/null
+++ b/test/asm/listing/ref/123-errormsg.err2
@@ -0,0 +1 @@
+123-errormsg.s:1: Error: Expected 'end-of-line' but found 'foo'
diff --git a/test/asm/listing/ref/124-errormsg.err2 b/test/asm/listing/ref/124-errormsg.err2
new file mode 100644
index 000000000..b96690f68
--- /dev/null
+++ b/test/asm/listing/ref/124-errormsg.err2
@@ -0,0 +1 @@
+124-errormsg.s:1: Error: Expected 'Y' but found 'A'
diff --git a/test/asm/listing/ref/125-errormsg.err2 b/test/asm/listing/ref/125-errormsg.err2
new file mode 100644
index 000000000..4640ed3d5
--- /dev/null
+++ b/test/asm/listing/ref/125-errormsg.err2
@@ -0,0 +1,2 @@
+125-errormsg.s:1: Error: Expected 'X' or 'S' but found 'A'
+125-errormsg.s:1: Error: Illegal addressing mode
diff --git a/test/asm/listing/ref/126-errormsg.err2 b/test/asm/listing/ref/126-errormsg.err2
new file mode 100644
index 000000000..ba42cc0bb
--- /dev/null
+++ b/test/asm/listing/ref/126-errormsg.err2
@@ -0,0 +1 @@
+126-errormsg.s:2: Error: Expected a storage allocator after the field name but found 'end-of-line'
diff --git a/test/asm/listing/ref/127-errormsg.err2 b/test/asm/listing/ref/127-errormsg.err2
new file mode 100644
index 000000000..cdc5eada7
--- /dev/null
+++ b/test/asm/listing/ref/127-errormsg.err2
@@ -0,0 +1 @@
+127-errormsg.s:1: Error: Expected a mnemonic but found '127'
diff --git a/test/asm/listing/ref/128-errormsg.err2 b/test/asm/listing/ref/128-errormsg.err2
new file mode 100644
index 000000000..28982e479
--- /dev/null
+++ b/test/asm/listing/ref/128-errormsg.err2
@@ -0,0 +1 @@
+128-errormsg.s:1: Error: Expected ',' but found 'end-of-line'
diff --git a/test/asm/listing/ref/129-errormsg.err2 b/test/asm/listing/ref/129-errormsg.err2
new file mode 100644
index 000000000..4b35ded67
--- /dev/null
+++ b/test/asm/listing/ref/129-errormsg.err2
@@ -0,0 +1 @@
+129-errormsg.s:1: Error: Expected ',' but found 'end-of-line'
diff --git a/test/asm/listing/ref/130-errormsg.err2 b/test/asm/listing/ref/130-errormsg.err2
new file mode 100644
index 000000000..79b40a915
--- /dev/null
+++ b/test/asm/listing/ref/130-errormsg.err2
@@ -0,0 +1,2 @@
+130-errormsg.s:1: Error: Expected an expression but found '|'
+130-errormsg.s:1: Error: Expected an expression but found 'end-of-line'
diff --git a/test/asm/listing/ref/131-errormsg.err2 b/test/asm/listing/ref/131-errormsg.err2
new file mode 100644
index 000000000..46cc77c62
--- /dev/null
+++ b/test/asm/listing/ref/131-errormsg.err2
@@ -0,0 +1 @@
+131-errormsg.s:1: Error: Expected 'end-of-line' but found '1'

From b1eb1bf6ab29805ff1c7d34944e39b3e712d746d Mon Sep 17 00:00:00 2001
From: Kugel Fuhr <98353208+kugelfuhr@users.noreply.github.com>
Date: Mon, 7 Jul 2025 16:47:36 +0200
Subject: [PATCH 02/13] Colorize diagnostics.

---
 doc/ca65.sgml           |  17 ++--
 src/ca65/error.c        |  81 +++++++++++-----
 src/ca65/main.c         |  25 ++++-
 src/common/capability.h |   2 +-
 src/common/consprop.c   | 208 ++++++++++++++++++++++++++++++++++++++++
 src/common/consprop.h   | 174 +++++++++++++++++++++++++++++++++
 6 files changed, 473 insertions(+), 34 deletions(-)
 create mode 100644 src/common/consprop.c
 create mode 100644 src/common/consprop.h

diff --git a/doc/ca65.sgml b/doc/ca65.sgml
index 90d3aba32..f1154d4b2 100644
--- a/doc/ca65.sgml
+++ b/doc/ca65.sgml
@@ -106,6 +106,7 @@ Short options:
 Long options:
   --auto-import                 Mark unresolved symbols as import
   --bin-include-dir dir         Set a search path for binary includes
+  --color [on|auto|off]         Color diagnostics (default: auto)
   --cpu type                    Set cpu type
   --create-dep name             Create a make dependency file
   --create-full-dep name        Create a full make dependency file
@@ -120,7 +121,7 @@ Long options:
   --list-bytes n                Maximum number of bytes per listing line
   --memory-model model          Set the memory model
   --pagelength n                Set the page length for the listing
-  --relax-checks                Disables some error checks
+  --relax-checks                Relax some checks (see docs)
   --smart                       Enable smart mode
   --target sys                  Set the target system
   --verbose                     Increase verbosity
@@ -146,6 +147,14 @@ Here is a description of all the command line options:
   name="search paths">.
 
 
+  <label id="option-color">
+  <tag><tt>--color</tt></tag>
+
+  This option controls if the assembler will use colors when printing
+  diagnostics. The default is "auto" which will enable colors if the output
+  goes to a terminal (not to a file).
+
+
   <label id="option--cpu">
   <tag><tt>--cpu type</tt></tag>
 
@@ -186,12 +195,6 @@ Here is a description of all the command line options:
   information to the assembler.
 
 
-  <tag><tt>-d, --debug</tt></tag>
-
-  Enables debug mode, something that should not be needed for mere
-  mortals:-)
-
-
   <label id="option--feature">
   <tag><tt>--feature name</tt></tag>
 
diff --git a/src/ca65/error.c b/src/ca65/error.c
index 28ff6aa59..e851a7f2a 100644
--- a/src/ca65/error.c
+++ b/src/ca65/error.c
@@ -38,6 +38,8 @@
 #include <stdarg.h>
 
 /* common */
+#include "cmdline.h"
+#include "consprop.h"
 #include "strbuf.h"
 
 /* ca65 */
@@ -45,6 +47,7 @@
 #include "filetab.h"
 #include "lineinfo.h"
 #include "nexttok.h"
+#include "spool.h"
 
 
 
@@ -64,6 +67,14 @@ unsigned WarningCount   = 0;
 /* Maximum number of additional notifications */
 #define MAX_NOTES       8
 
+/* Diagnostic category */
+typedef enum { DC_NOTE, DC_WARN, DC_ERR, DC_FATAL, DC_COUNT } DiagCat;
+
+/* Descriptions for diagnostic categories */
+const char* DiagCatDesc[DC_COUNT] = {
+    "Note", "Warning", "Error", "Fatal error"
+};
+
 
 
 /*****************************************************************************/
@@ -72,27 +83,53 @@ unsigned WarningCount   = 0;
 
 
 
-static void VPrintMsg (const FilePos* Pos, const char* Desc,
-                       const char* Format, va_list ap)
+static void VPrintMsg (const FilePos* Pos, DiagCat Cat, const char* Format,
+                       va_list ap)
 /* Format and output an error/warning message. */
 {
-    StrBuf S = STATIC_STRBUF_INITIALIZER;
+    StrBuf S   = AUTO_STRBUF_INITIALIZER;
+    StrBuf Msg = AUTO_STRBUF_INITIALIZER;
+    StrBuf Loc = AUTO_STRBUF_INITIALIZER;
+
+    /* Determine the description for the category and its color */
+    const char* Desc = DiagCatDesc[Cat];
+    const char* Color;
+    switch (Cat) {
+        case DC_NOTE:   Color = CP_Cyan ();             break;
+        case DC_WARN:   Color = CP_Yellow ();           break;
+        case DC_ERR:    Color = CP_BrightRed ();        break;
+        case DC_FATAL:  Color = CP_BrightRed ();        break;
+        default:        FAIL ("Unexpected Cat value");  break;
+    }
 
     /* Format the actual message */
-    StrBuf Msg = STATIC_STRBUF_INITIALIZER;
     SB_VPrintf (&Msg, Format, ap);
     SB_Terminate (&Msg);
 
-    /* Format the message header */
-    SB_Printf (&S, "%s:%u: %s: ",
-               SB_GetConstBuf (GetFileName (Pos->Name)),
-               Pos->Line,
-               Desc);
+    /* Format the location. If the file position is valid, we use the file
+    ** position, otherwise the program name. This allows to print fatal
+    ** errors in the startup phase.
+    */
+    if (Pos->Name == EMPTY_STRING_ID) {
+        SB_CopyStr (&Loc, ProgName);
+    } else {
+        SB_Printf (&Loc, "%s:%u", SB_GetConstBuf (GetFileName (Pos->Name)),
+                   Pos->Line);
+    }
+    SB_Terminate (&Loc);
 
-    /* Append the message to the message header */
-    SB_Append (&S, &Msg);
+    /* Format the full message */
+    SB_Printf (&S, "%s%s: %s%s:%s %s%s",
+               CP_White (),
+               SB_GetConstBuf (&Loc),
+               Color,
+               Desc,
+               CP_White (),
+               SB_GetConstBuf (&Msg),
+               CP_Reset ());
 
-    /* Delete the formatted message */
+    /* Delete the formatted message and the location string */
+    SB_Done (&Loc);
     SB_Done (&Msg);
 
     /* Add a new line and terminate the generated full message */
@@ -183,7 +220,7 @@ void PNotification (const FilePos* Pos, const char* Format, ...)
     /* Output the message */
     va_list ap;
     va_start (ap, Format);
-    VPrintMsg (Pos, "Note", Format, ap);
+    VPrintMsg (Pos, DC_NOTE, Format, ap);
     va_end (ap);
 }
 
@@ -202,7 +239,7 @@ static void WarningMsg (const Collection* LineInfos, const char* Format, va_list
     const LineInfo* LI = CollConstAt (LineInfos, 0);
 
     /* Output a warning for this position */
-    VPrintMsg (GetSourcePos (LI), "Warning", Format, ap);
+    VPrintMsg (GetSourcePos (LI), DC_WARN, Format, ap);
 
     /* Add additional notifications if necessary */
     AddNotifications (LineInfos);
@@ -243,7 +280,7 @@ void PWarning (const FilePos* Pos, unsigned Level, const char* Format, ...)
     if (Level <= WarnLevel) {
         va_list ap;
         va_start (ap, Format);
-        VPrintMsg (Pos, "Warning", Format, ap);
+        VPrintMsg (Pos, DC_WARN, Format, ap);
         va_end (ap);
 
         /* Count warnings */
@@ -280,7 +317,7 @@ void ErrorMsg (const Collection* LineInfos, const char* Format, va_list ap)
     const LineInfo* LI = CollConstAt (LineInfos, 0);
 
     /* Output an error for this position */
-    VPrintMsg (GetSourcePos (LI), "Error", Format, ap);
+    VPrintMsg (GetSourcePos (LI), DC_ERR, Format, ap);
 
     /* Add additional notifications if necessary */
     AddNotifications (LineInfos);
@@ -317,7 +354,7 @@ void PError (const FilePos* Pos, const char* Format, ...)
 {
     va_list ap;
     va_start (ap, Format);
-    VPrintMsg (Pos, "Error", Format, ap);
+    VPrintMsg (Pos, DC_ERR, Format, ap);
     va_end (ap);
 
     /* Count errors */
@@ -371,18 +408,12 @@ void ErrorSkip (const char* Format, ...)
 void Fatal (const char* Format, ...)
 /* Print a message about a fatal error and die */
 {
+    /* Output the message ... */
     va_list ap;
-    StrBuf S = STATIC_STRBUF_INITIALIZER;
-
     va_start (ap, Format);
-    SB_VPrintf (&S, Format, ap);
-    SB_Terminate (&S);
+    VPrintMsg (&CurTok.Pos, DC_FATAL, Format, ap);
     va_end (ap);
 
-    fprintf (stderr, "Fatal error: %s\n", SB_GetConstBuf (&S));
-
-    SB_Done (&S);
-
     /* And die... */
     exit (EXIT_FAILURE);
 }
diff --git a/src/ca65/main.c b/src/ca65/main.c
index 9c8cb0e96..f871f0ac8 100644
--- a/src/ca65/main.c
+++ b/src/ca65/main.c
@@ -42,6 +42,7 @@
 #include "addrsize.h"
 #include "chartype.h"
 #include "cmdline.h"
+#include "consprop.h"
 #include "debugflag.h"
 #include "mmodel.h"
 #include "print.h"
@@ -111,6 +112,7 @@ static void Usage (void)
             "Long options:\n"
             "  --auto-import\t\t\tMark unresolved symbols as import\n"
             "  --bin-include-dir dir\t\tSet a search path for binary includes\n"
+            "  --color [on|auto|off]\t\tColor diagnostics (default: auto)\n"
             "  --cpu type\t\t\tSet cpu type\n"
             "  --create-dep name\t\tCreate a make dependency file\n"
             "  --create-full-dep name\tCreate a full make dependency file\n"
@@ -129,7 +131,8 @@ static void Usage (void)
             "  --smart\t\t\tEnable smart mode\n"
             "  --target sys\t\t\tSet the target system\n"
             "  --verbose\t\t\tIncrease verbosity\n"
-            "  --version\t\t\tPrint the assembler version\n",
+            "  --version\t\t\tPrint the assembler version\n"
+            "  --warnings-as-errors\t\tTreat warnings as errors\n",
             ProgName);
 }
 
@@ -492,6 +495,22 @@ static void OptBinIncludeDir (const char* Opt attribute ((unused)), const char*
 
 
 
+static void OptColor(const char* Opt, const char* Arg)
+/* Handle the --color option */
+{
+    if (strcmp (Arg, "off") == 0 || strcmp (Arg, "false") == 0) {
+        CP_SetColorMode (CM_OFF);
+    } else if (strcmp (Arg, "auto") == 0) {
+        CP_SetColorMode (CM_AUTO);
+    } else if (strcmp (Arg, "on") == 0 || strcmp (Arg, "true") == 0) {
+        CP_SetColorMode (CM_ON);
+    } else {
+        AbEnd ("Invalid argument to %s: %s", Opt, Arg);
+    }
+}
+
+
+
 static void OptCPU (const char* Opt attribute ((unused)), const char* Arg)
 /* Handle the --cpu option */
 {
@@ -1013,6 +1032,7 @@ int main (int argc, char* argv [])
     static const LongOpt OptTab[] = {
         { "--auto-import",         0,      OptAutoImport           },
         { "--bin-include-dir",     1,      OptBinIncludeDir        },
+        { "--color",               1,      OptColor                },
         { "--cpu",                 1,      OptCPU                  },
         { "--create-dep",          1,      OptCreateDep            },
         { "--create-full-dep",     1,      OptCreateFullDep        },
@@ -1040,6 +1060,9 @@ int main (int argc, char* argv [])
 
     unsigned I;
 
+    /* Initialize console output */
+    CP_Init ();
+
     /* Initialize the cmdline module */
     InitCmdLine (&argc, &argv, "ca65");
 
diff --git a/src/common/capability.h b/src/common/capability.h
index b0332c72e..a5c719b45 100644
--- a/src/common/capability.h
+++ b/src/common/capability.h
@@ -6,7 +6,7 @@
 /*                                                                           */
 /*                                                                           */
 /*                                                                           */
-/* (C) 2026,     Kugelfuhr                                                   */
+/* (C) 2025,     Kugelfuhr                                                   */
 /*                                                                           */
 /*                                                                           */
 /* This software is provided 'as-is', without any expressed or implied       */
diff --git a/src/common/consprop.c b/src/common/consprop.c
new file mode 100644
index 000000000..03ecb449d
--- /dev/null
+++ b/src/common/consprop.c
@@ -0,0 +1,208 @@
+/*****************************************************************************/
+/*                                                                           */
+/*                                consprop.c                                 */
+/*                                                                           */
+/*                            Console properties                             */
+/*                                                                           */
+/*                                                                           */
+/*                                                                           */
+/* (C) 2025,      Kugelfuhr                                                  */
+/*                                                                           */
+/*                                                                           */
+/* This software is provided 'as-is', without any expressed or implied       */
+/* warranty.  In no event will the authors be held liable for any damages    */
+/* arising from the use of this software.                                    */
+/*                                                                           */
+/* Permission is granted to anyone to use this software for any purpose,     */
+/* including commercial applications, and to alter it and redistribute it    */
+/* freely, subject to the following restrictions:                            */
+/*                                                                           */
+/* 1. The origin of this software must not be misrepresented; you must not   */
+/*    claim that you wrote the original software. If you use this software   */
+/*    in a product, an acknowledgment in the product documentation would be  */
+/*    appreciated but is not required.                                       */
+/* 2. Altered source versions must be plainly marked as such, and must not   */
+/*    be misrepresented as being the original software.                      */
+/* 3. This notice may not be removed or altered from any source              */
+/*    distribution.                                                          */
+/*                                                                           */
+/*****************************************************************************/
+
+
+
+#include <stdlib.h>
+#include <unistd.h>
+#ifdef _WIN32
+#include <windows.h>
+#define isatty _isatty
+#endif
+
+/* common */
+#include "consprop.h"
+
+
+
+/*****************************************************************************/
+/*                                   Data                                    */
+/*****************************************************************************/
+
+
+
+#ifdef _WIN32
+static unsigned CodePage;               /* Windows code page on startup */
+#endif
+
+/* State variables */
+static int IsTTY = 1;                   /* True if console is a tty */
+static int IsUTF8 = 1;                  /* True if console is in UTF-8 mode */
+static int Color = 0;                   /* True if we should use color */
+static ColorMode CMode = CM_AUTO;       /* Current color mode */
+
+/* ANSI escape sequences for color */
+const char CP_ColorSeq[CC_COUNT][2][8] = {
+    { "", "\x1b[30m", },                /* Black */
+    { "", "\x1b[31m", },                /* Red */
+    { "", "\x1b[32m", },                /* Green */
+    { "", "\x1b[33m", },                /* Brown */
+    { "", "\x1b[34m", },                /* Blue */
+    { "", "\x1b[35m", },                /* Magenta */
+    { "", "\x1b[36m", },                /* Cyan */
+    { "", "\x1b[37m", },                /* LightGray */
+    { "", "\x1b[90m", },                /* Gray */
+    { "", "\x1b[91m", },                /* BrightRed */
+    { "", "\x1b[92m", },                /* BrightGreen */
+    { "", "\x1b[93m", },                /* Yellow */
+    { "", "\x1b[94m", },                /* BrightBlue */
+    { "", "\x1b[95m", },                /* BrightMagenta */
+    { "", "\x1b[96m", },                /* BrightCyan */
+    { "", "\x1b[97m", },                /* White */
+};
+
+/* Box drawing sequences */
+const char CP_BoxDrawingSeq[BD_COUNT][2][4] = {
+    { "-", "\xE2\x94\x80", },           /* "─" - Horizontal */
+    { "|", "\xE2\x94\x82", },           /* "│" - Vertical */
+    { "+", "\xE2\x94\x8C", },           /* "┌" - ULCorner */
+    { "+", "\xE2\x94\x94", },           /* "└" - LLCorner */
+    { "+", "\xE2\x94\x90", },           /* "┐" - URCorner */
+    { "+", "\xE2\x94\x98", },           /* "┘" - LRCorner */
+    { "+", "\xE2\x94\x9C", },           /* "├" - VerticalRight */
+    { "+", "\xE2\x94\xA4", },           /* "┤" - VerticalLeft */
+    { "+", "\xE2\x94\xAC", },           /* "┬" - HorizontalDown */
+    { "+", "\xE2\x94\xB4", },           /* "┴" - HorizontalUp */
+};
+
+
+
+/*****************************************************************************/
+/*                                 Helpers                                   */
+/*****************************************************************************/
+
+
+
+#ifdef _WIN32
+static void Cleanup()
+/* Cleanup on program exit */
+{
+    SetConsoleOutputCP (CodePage);
+}
+#endif
+
+
+
+/*****************************************************************************/
+/*                                   Code                                    */
+/*****************************************************************************/
+
+
+
+void CP_Init (void)
+/* Init console properties. Must be called before using any other function or
+** data from this module.
+*/
+{
+    IsTTY = (isatty (STDOUT_FILENO) && isatty (STDERR_FILENO));
+    CP_SetColorMode (CMode);
+
+#ifdef _WIN32
+    if (IsTTY) {
+        CodePage = GetConsoleOutputCP ();
+        if (SetConsoleOutputCP (CP_UTF8)) {
+            IsUTF8 = 1;
+            atexit (Cleanup);
+        }
+        if (Color) {
+            HANDLE StdOut = GetStdHandle (STD_OUTPUT_HANDLE);
+            if (StdOut != INVALID_HANDLE_VALUE) {
+                DWORD Mode;
+                if (GetConsoleMode (StdOut, &Mode)) {
+                    Mode |= ENABLE_PROCESSED_OUTPUT |
+                            ENABLE_VIRTUAL_TERMINAL_PROCESSING;
+                    SetConsoleMode (StdOut, Mode);
+                }
+            }
+        }
+    }
+#endif
+}
+
+
+
+int CP_IsTTY (void)
+/* Return true if console output goes to a tty */
+{
+    return IsTTY;
+}
+
+
+
+int CP_IsUTF8 (void)
+/* Return true if the console supports UTF-8 */
+{
+    return IsUTF8;
+}
+
+
+
+int CP_HasColor (void)
+/* Return true if the console supports color and it should be used */
+{
+    return Color;
+}
+
+
+
+ColorMode CP_GetColorMode (void)
+/* Return the current color mode */
+{
+    return CMode;
+}
+
+
+
+void CP_SetColorMode (ColorMode M)
+/* Set the color mode */
+{
+    CMode = M;
+    switch (CMode) {
+        case CM_AUTO:   Color = IsTTY;  break;
+        case CM_ON:     Color = 1;      break;
+        default:        Color = 0;      break;
+    }
+}
+
+
+
+void CP_DisableUTF8 (void)
+/* Disable UTF-8 support */
+{
+    IsUTF8 = 0;
+}
+
+
+
+void CP_EnableUTF8 (void)
+/* Enable UTF-8 support */
+{
+    IsUTF8 = 1;
+}
diff --git a/src/common/consprop.h b/src/common/consprop.h
new file mode 100644
index 000000000..d27dda7cf
--- /dev/null
+++ b/src/common/consprop.h
@@ -0,0 +1,174 @@
+/*****************************************************************************/
+/*                                                                           */
+/*                                consprop.h                                 */
+/*                                                                           */
+/*                            Console properties                             */
+/*                                                                           */
+/*                                                                           */
+/*                                                                           */
+/* (C) 2025,      Kugelfuhr                                                  */
+/*                                                                           */
+/*                                                                           */
+/* This software is provided 'as-is', without any expressed or implied       */
+/* warranty.  In no event will the authors be held liable for any damages    */
+/* arising from the use of this software.                                    */
+/*                                                                           */
+/* Permission is granted to anyone to use this software for any purpose,     */
+/* including commercial applications, and to alter it and redistribute it    */
+/* freely, subject to the following restrictions:                            */
+/*                                                                           */
+/* 1. The origin of this software must not be misrepresented; you must not   */
+/*    claim that you wrote the original software. If you use this software   */
+/*    in a product, an acknowledgment in the product documentation would be  */
+/*    appreciated but is not required.                                       */
+/* 2. Altered source versions must be plainly marked as such, and must not   */
+/*    be misrepresented as being the original software.                      */
+/* 3. This notice may not be removed or altered from any source              */
+/*    distribution.                                                          */
+/*                                                                           */
+/*****************************************************************************/
+
+
+
+#ifndef CONSPROP_H
+#define CONSPROP_H
+
+
+
+/* common */
+#include "check.h"
+#include "consprop.h"
+
+
+
+/*****************************************************************************/
+/*                                   Data                                    */
+/*****************************************************************************/
+
+
+
+/* Color mode for the program */
+enum ColorMode { CM_OFF, CM_AUTO, CM_ON };
+typedef enum ColorMode ColorMode;
+
+/* Colors */
+enum ConsoleColor {
+    CC_BLACK, CC_RED, CC_GREEN, CC_BROWN,
+    CC_BLUE, CC_MAGENTA, CC_CYAN, CC_LIGHTGRAY,
+    CC_GRAY, CC_BRIGHTRED, CC_BRIGHTGREEN, CC_YELLOW,
+    CC_BRIGHTBLUE, CC_BRIGHTMAGENTA, CC_BRIGHTCYAN, CC_WHITE,
+    CC_COUNT,   /* Number of colors */
+};
+typedef enum ConsoleColor ConsoleColor;
+
+/* Box drawing characters */
+enum BoxDrawing {
+    BD_HORIZONTAL,
+    BD_VERTICAL,
+    BD_ULCORNER,
+    BD_LLCORNER,
+    BD_URCORNER,
+    BD_LRCORNER,
+    BD_RVERTICAL,
+    BD_LVERTICAL,
+    BD_DHORIZONTAL,
+    BD_UHORIZONTAL,
+    BD_COUNT,           /* Number of available box drawing chars */
+};
+typedef enum BoxDrawing BoxDrawing;
+
+/* ANSI escape sequences for color - don't use directly */
+extern const char CP_ColorSeq[CC_COUNT][2][8];
+
+/* Box drawing characters - don't use directly */
+extern const char CP_BoxDrawingSeq[BD_COUNT][2][4];
+
+
+
+/*****************************************************************************/
+/*                                   Code                                    */
+/*****************************************************************************/
+
+
+
+void CP_Init (void);
+/* Init console properties. Must be called before using any other function or
+** data from this module.
+**/
+
+int CP_IsTTY (void);
+/* Return true if console output goes to a tty */
+
+int CP_IsUTF8 (void);
+/* Return true if the console supports UTF-8 */
+
+int CP_HasColor (void);
+/* Return true if the console supports color and it should be used */
+
+ColorMode CP_GetColorMode (void);
+/* Return the current color mode */
+
+void CP_SetColorMode (ColorMode M);
+/* Set the color mode */
+
+void CP_DisableUTF8 (void);
+/* Disable UTF-8 support */
+
+void CP_EnableUTF8 (void);
+/* Enable UTF-8 support */
+
+static inline const char* CP_Color (ConsoleColor C)
+/* Return the ANSI escape sequence for a specific color or an empty string */
+{
+    PRECONDITION (C >= 0 && C < CC_COUNT);
+    return CP_ColorSeq[C][CP_HasColor ()];
+}
+
+static inline const char* CP_Reset (void)
+/* Return the ANSI escape sequence to reset the colors or an empty string */
+{
+    return CP_HasColor () ? "\x1b[0m" : "";
+}
+
+/* Return specific colors */
+static inline const char* CP_Black (void) { return CP_Color (CC_BLACK); }
+static inline const char* CP_Red (void) { return CP_Color (CC_RED); }
+static inline const char* CP_Green (void) { return CP_Color (CC_GREEN); }
+static inline const char* CP_Brown (void) { return CP_Color (CC_BROWN); }
+static inline const char* CP_Blue (void) { return CP_Color (CC_BLUE); }
+static inline const char* CP_Magenta (void) { return CP_Color (CC_MAGENTA); }
+static inline const char* CP_Cyan (void) { return CP_Color (CC_CYAN); }
+static inline const char* CP_LightGray (void) { return CP_Color (CC_LIGHTGRAY); }
+static inline const char* CP_Gray (void) { return CP_Color (CC_GRAY); }
+static inline const char* CP_BrightRed (void) { return CP_Color (CC_BRIGHTRED); }
+static inline const char* CP_BrightGreen (void) { return CP_Color (CC_BRIGHTGREEN); }
+static inline const char* CP_Yellow (void) { return CP_Color (CC_YELLOW); }
+static inline const char* CP_BrightBlue (void) { return CP_Color (CC_BRIGHTBLUE); }
+static inline const char* CP_BrightMagenta (void) { return CP_Color (CC_BRIGHTMAGENTA); }
+static inline const char* CP_BrightCyan (void) { return CP_Color (CC_BRIGHTCYAN); }
+static inline const char* CP_White (void) { return CP_Color (CC_WHITE); }
+
+static inline const char* CP_BoxDrawing (BoxDrawing B)
+/* Return the UTF-8 sequence for the box drawing characters */
+{
+    PRECONDITION (B >= 0 && B < BD_COUNT);
+    return CP_BoxDrawingSeq[B][CP_IsUTF8 ()];
+}
+
+/* Return specific box drawing character sequences */
+static inline const char* CP_Horizontal (void) { return CP_BoxDrawing (BD_HORIZONTAL); }
+static inline const char* CP_Vertical (void) { return CP_BoxDrawing (BD_VERTICAL); }
+static inline const char* CP_ULCorner (void) { return CP_BoxDrawing (BD_ULCORNER); }
+static inline const char* CP_LLCorner (void) { return CP_BoxDrawing (BD_LLCORNER); }
+static inline const char* CP_URCorner (void) { return CP_BoxDrawing (BD_URCORNER); }
+static inline const char* CP_LRCorner (void) { return CP_BoxDrawing (BD_LRCORNER); }
+static inline const char* CP_VerticalRight (void) { return CP_BoxDrawing (BD_RVERTICAL); }
+static inline const char* CP_VerticalLeft (void) { return CP_BoxDrawing (BD_LVERTICAL); }
+static inline const char* CP_HorizontalDown (void) { return CP_BoxDrawing (BD_DHORIZONTAL); }
+static inline const char* CP_HorizontalUp (void) { return CP_BoxDrawing (BD_UHORIZONTAL); }
+
+
+
+/* End of consprop.h */
+
+#endif

From c466faf484781b33e7b5ab211d0b95266a3f3ba6 Mon Sep 17 00:00:00 2001
From: Kugel Fuhr <98353208+kugelfuhr@users.noreply.github.com>
Date: Mon, 7 Jul 2025 21:49:45 +0200
Subject: [PATCH 03/13] Use UTF-8 for diagnostic output if it is available.
 Added a command line switch --no-utf8 to disable the use of UTF-8 characters.

---
 doc/ca65.sgml        |  11 +++-
 src/ca65/condasm.c   |   1 +
 src/ca65/dbginfo.c   |   3 +-
 src/ca65/ea65.c      |  17 ++++---
 src/ca65/easw16.c    |   1 +
 src/ca65/enum.c      |   3 +-
 src/ca65/error.c     |  92 +++++++++++++++++++++++++++++++++-
 src/ca65/error.h     |   3 ++
 src/ca65/expect.c    | 116 +++++++++++++++++++++++++++++++++++++++++++
 src/ca65/expect.h    |  83 +++++++++++++++++++++++++++++++
 src/ca65/expr.c      |  15 +++---
 src/ca65/filetab.c   |   4 +-
 src/ca65/instr.c     |   2 +-
 src/ca65/listing.c   |   2 +-
 src/ca65/macro.c     |  31 ++++++------
 src/ca65/main.c      |  20 ++++++--
 src/ca65/nexttok.c   |  88 +++-----------------------------
 src/ca65/nexttok.h   |  30 -----------
 src/ca65/objfile.c   |   4 +-
 src/ca65/pseudo.c    |  15 +++---
 src/ca65/repeat.c    |   5 +-
 src/ca65/scanner.c   |  13 ++---
 src/ca65/segment.c   |   2 +-
 src/ca65/struct.c    |   5 +-
 src/ca65/studyexpr.c |   2 +-
 src/ca65/symbol.c    |   5 +-
 src/ca65/symentry.c  |  52 +++++++++----------
 src/ca65/symtab.c    |  24 ++++-----
 28 files changed, 435 insertions(+), 214 deletions(-)
 create mode 100644 src/ca65/expect.c
 create mode 100644 src/ca65/expect.h

diff --git a/doc/ca65.sgml b/doc/ca65.sgml
index f1154d4b2..31da0306c 100644
--- a/doc/ca65.sgml
+++ b/doc/ca65.sgml
@@ -120,6 +120,7 @@ Long options:
   --listing name                Create a listing file if assembly was ok
   --list-bytes n                Maximum number of bytes per listing line
   --memory-model model          Set the memory model
+  --no-utf8                     Disable use of UTF-8 in diagnostics
   --pagelength n                Set the page length for the listing
   --relax-checks                Relax some checks (see docs)
   --smart                       Enable smart mode
@@ -147,7 +148,7 @@ Here is a description of all the command line options:
   name="search paths">.
 
 
-  <label id="option-color">
+  <label id="option--color">
   <tag><tt>--color</tt></tag>
 
   This option controls if the assembler will use colors when printing
@@ -262,6 +263,14 @@ Here is a description of all the command line options:
   huge.
 
 
+  <label id="option--no-utf8">
+  <tag><tt>--no-utf8</tt></tag>
+
+  Disable the use of UTF-8 characters in diagnostics. This might be necessary
+  if auto detection fails or if the output is captured for processing with a
+  tool that is not UTF-8 capable.
+
+
   <label id="option-o">
   <tag><tt>-o name</tt></tag>
 
diff --git a/src/ca65/condasm.c b/src/ca65/condasm.c
index 5f542ad87..f58a3535c 100644
--- a/src/ca65/condasm.c
+++ b/src/ca65/condasm.c
@@ -35,6 +35,7 @@
 
 /* ca65 */
 #include "error.h"
+#include "expect.h"
 #include "expr.h"
 #include "instr.h"
 #include "lineinfo.h"
diff --git a/src/ca65/dbginfo.c b/src/ca65/dbginfo.c
index efc685eb6..fa2216c5d 100644
--- a/src/ca65/dbginfo.c
+++ b/src/ca65/dbginfo.c
@@ -46,6 +46,7 @@
 /* ca65 */
 #include "dbginfo.h"
 #include "error.h"
+#include "expect.h"
 #include "expr.h"
 #include "filetab.h"
 #include "global.h"
@@ -462,7 +463,7 @@ void DbgInfoCheck (void)
         /* Search for the symbol name */
         S->Sym = SymFindAny (S->Scope, GetStrBuf (S->AsmName));
         if (S->Sym == 0) {
-            PError (&S->Pos, "Assembler symbol '%s' not found",
+            PError (&S->Pos, "Assembler symbol `%s' not found",
                     GetString (S->AsmName));
         } else {
             /* Set the backlink */
diff --git a/src/ca65/ea65.c b/src/ca65/ea65.c
index 50a0f6de1..e6fc1b6ec 100644
--- a/src/ca65/ea65.c
+++ b/src/ca65/ea65.c
@@ -37,6 +37,7 @@
 #include "ea.h"
 #include "ea65.h"
 #include "error.h"
+#include "expect.h"
 #include "expr.h"
 #include "instr.h"
 #include "nexttok.h"
@@ -62,11 +63,11 @@ void GetEA (EffAddr* A)
     if (BracketAsIndirect) {
         IndirectEnter = TOK_LBRACK;
         IndirectLeave = TOK_RBRACK;
-        IndirectExpect = "Expected ']'";
+        IndirectExpect = "Expected `]'";
     } else {
         IndirectEnter = TOK_LPAREN;
         IndirectLeave = TOK_RPAREN;
-        IndirectExpect = "Expected ')'";
+        IndirectExpect = "Expected `)'";
     }
 
     /* Clear the output struct */
@@ -145,12 +146,12 @@ void GetEA (EffAddr* A)
                 A->AddrModeSet = AM65_STACK_REL_IND_Y;
                 if (!Consume (IndirectLeave, IndirectExpect) ||
                     !ConsumeComma ()                         ||
-                    !Consume (TOK_Y, "Expected 'Y'")) {
+                    !Consume (TOK_Y, "Expected `Y'")) {
                     /* In case of errors skip anything else on the line */
                     SkipUntilSep ();
                 }
             } else {
-                ErrorExpect ("Expected 'X' or 'S'");
+                ErrorExpect ("Expected `X' or `S'");
                 SkipUntilSep ();
             }
 
@@ -168,7 +169,7 @@ void GetEA (EffAddr* A)
                     A->AddrModeSet = AM65_DIR_IND;
                     break;
                 default:
-                    if (!Consume (TOK_Y, "Expected 'Y'")) {
+                    if (!Consume (TOK_Y, "Expected `Y'")) {
                         SkipUntilSep ();
                     }
                     A->AddrModeSet = AM65_DIR_IND_Y;
@@ -198,20 +199,20 @@ void GetEA (EffAddr* A)
         /* [dir] or [dir],y */
         NextTok ();
         A->Expr = Expression ();
-        if (!Consume (TOK_RBRACK, "Expected ']'")) {
+        if (!Consume (TOK_RBRACK, "Expected `]'")) {
             SkipUntilSep ();
         }
         if (CurTok.Tok == TOK_COMMA) {
             /* [dir],y */
             NextTok ();
             if (GetCPU () == CPU_45GS02) {
-                if (!Consume (TOK_Z, "Expected 'Z'")) {
+                if (!Consume (TOK_Z, "Expected `Z'")) {
                     SkipUntilSep ();
                 }
                 A->AddrModeSet = AM65_32BIT_BASE_IND_Z;
             }
             else {
-                if (!Consume (TOK_Y, "Expected 'Y'")) {
+                if (!Consume (TOK_Y, "Expected `Y'")) {
                     SkipUntilSep ();
                 }
                 A->AddrModeSet = AM65_DIR_IND_LONG_Y;
diff --git a/src/ca65/easw16.c b/src/ca65/easw16.c
index aea52f034..4376ab998 100644
--- a/src/ca65/easw16.c
+++ b/src/ca65/easw16.c
@@ -37,6 +37,7 @@
 #include "ea.h"
 #include "ea65.h"
 #include "error.h"
+#include "expect.h"
 #include "expr.h"
 #include "instr.h"
 #include "nexttok.h"
diff --git a/src/ca65/enum.c b/src/ca65/enum.c
index 586d9b67f..93dbf0b6e 100644
--- a/src/ca65/enum.c
+++ b/src/ca65/enum.c
@@ -41,6 +41,7 @@
 #include "condasm.h"
 #include "enum.h"
 #include "error.h"
+#include "expect.h"
 #include "expr.h"
 #include "macro.h"
 #include "nexttok.h"
@@ -147,7 +148,7 @@ void DoEnum (void)
     }
 
     /* End of enum definition */
-    Consume (TOK_ENDENUM, "'.ENDENUM' expected");
+    Consume (TOK_ENDENUM, "`.ENDENUM' expected");
 
     /* Free the base expression */
     FreeExpr (BaseExpr);
diff --git a/src/ca65/error.c b/src/ca65/error.c
index e851a7f2a..85f6296f8 100644
--- a/src/ca65/error.c
+++ b/src/ca65/error.c
@@ -83,6 +83,82 @@ const char* DiagCatDesc[DC_COUNT] = {
 
 
 
+static void ReplaceQuotes (StrBuf* Msg)
+/* Replace opening and closing single quotes in Msg by their typographically
+** correct UTF-8 counterparts for better readbility. A closing quote will
+** only get replaced if an opening quote has been seen before.
+** To handle some special cases, the function will also treat \xF0 as
+** opening and \xF1 as closing quote. These are replaced without the need for
+** correct ordering (open/close).
+** The function will change the quotes in place, so after the call Msg will
+** contain the changed string. If UTF-8 is not available, the function will
+** replace '`' by '\'' since that was the default behavior before. It will
+** also replace \xF0 and \xF1 by '\''.
+**/
+{
+    /* UTF-8 characters for single quotes */
+    static const char QuoteStart[] = "\xE2\x80\x98";
+    static const char QuoteEnd[]   = "\xE2\x80\x99";
+
+    /* Remember a few things */
+    int IsUTF8 = CP_IsUTF8 ();
+
+    /* We create a new string in T and will later copy it back to Msg */
+    StrBuf T = AUTO_STRBUF_INITIALIZER;
+
+    /* Parse the string and create a modified copy */
+    SB_Reset (Msg);
+    int InQuote = 0;
+    while (1) {
+        char C = SB_Get (Msg);
+        switch (C) {
+            case '`':
+                if (!InQuote && IsUTF8) {
+                    SB_AppendStr (&T, QuoteStart);
+                    InQuote = 1;
+                } else {
+                    /* ca65 uses \' for opening and closing quotes */
+                    SB_AppendChar (&T, '\'');
+                }
+                break;
+            case '\'':
+                if (InQuote && IsUTF8) {
+                    SB_AppendStr (&T, QuoteEnd);
+                    InQuote = 0;
+                } else {
+                    SB_AppendChar (&T, C);
+                }
+                break;
+            case '\xF0':
+                if (IsUTF8) {
+                    SB_AppendStr (&T, QuoteStart);
+                } else {
+                    SB_AppendChar (&T, '\'');
+                }
+                break;
+            case '\xF1':
+                if (IsUTF8) {
+                    SB_AppendStr (&T, QuoteEnd);
+                } else {
+                    SB_AppendChar (&T, '\'');
+                }
+                break;
+            case '\0':
+                goto Done;
+            default:
+                SB_AppendChar (&T, C);
+                break;
+        }
+    }
+
+Done:
+    /* Copy the string back, then terminate it */
+    SB_Move (Msg, &T);
+    SB_Terminate (Msg);
+}
+
+
+
 static void VPrintMsg (const FilePos* Pos, DiagCat Cat, const char* Format,
                        va_list ap)
 /* Format and output an error/warning message. */
@@ -102,9 +178,9 @@ static void VPrintMsg (const FilePos* Pos, DiagCat Cat, const char* Format,
         default:        FAIL ("Unexpected Cat value");  break;
     }
 
-    /* Format the actual message */
+    /* Format the actual message, then replace quotes */
     SB_VPrintf (&Msg, Format, ap);
-    SB_Terminate (&Msg);
+    ReplaceQuotes (&Msg);
 
     /* Format the location. If the file position is valid, we use the file
     ** position, otherwise the program name. This allows to print fatal
@@ -214,6 +290,18 @@ static void AddNotifications (const Collection* LineInfos)
 
 
 
+void Notification (const char* Format, ...)
+/* Print a notification message. */
+{
+    /* Output the message */
+    va_list ap;
+    va_start (ap, Format);
+    VPrintMsg (&CurTok.Pos, DC_NOTE, Format, ap);
+    va_end (ap);
+}
+
+
+
 void PNotification (const FilePos* Pos, const char* Format, ...)
 /* Print a notification message. */
 {
diff --git a/src/ca65/error.h b/src/ca65/error.h
index a55ceb8e4..2ae10744b 100644
--- a/src/ca65/error.h
+++ b/src/ca65/error.h
@@ -72,6 +72,9 @@ extern unsigned WarningCount;
 
 
 
+void Notification (const char* Format, ...) attribute ((format (printf, 1, 2)));
+/* Print a notification message. */
+
 void PNotification (const FilePos* Pos, const char* Format, ...) attribute ((format (printf, 2, 3)));
 /* Print a notification message. */
 
diff --git a/src/ca65/expect.c b/src/ca65/expect.c
new file mode 100644
index 000000000..d3d65765f
--- /dev/null
+++ b/src/ca65/expect.c
@@ -0,0 +1,116 @@
+/*****************************************************************************/
+/*                                                                           */
+/*                                 expect.c                                  */
+/*                                                                           */
+/*                      Print errors about expected tokens                   */
+/*                                                                           */
+/*                                                                           */
+/*                                                                           */
+/* (C) 2025,      Kugelfuhr                                                  */
+/*                                                                           */
+/*                                                                           */
+/* This software is provided 'as-is', without any expressed or implied       */
+/* warranty.  In no event will the authors be held liable for any damages    */
+/* arising from the use of this software.                                    */
+/*                                                                           */
+/* Permission is granted to anyone to use this software for any purpose,     */
+/* including commercial applications, and to alter it and redistribute it    */
+/* freely, subject to the following restrictions:                            */
+/*                                                                           */
+/* 1. The origin of this software must not be misrepresented; you must not   */
+/*    claim that you wrote the original software. If you use this software   */
+/*    in a product, an acknowledgment in the product documentation would be  */
+/*    appreciated but is not required.                                       */
+/* 2. Altered source versions must be plainly marked as such, and must not   */
+/*    be misrepresented as being the original software.                      */
+/* 3. This notice may not be removed or altered from any source              */
+/*    distribution.                                                          */
+/*                                                                           */
+/*****************************************************************************/
+
+
+
+/* ca65 */
+#include "error.h"
+#include "expect.h"
+#include "nexttok.h"
+#include "scanner.h"
+
+
+
+/*****************************************************************************/
+/*                                   Code                                    */
+/*****************************************************************************/
+
+
+
+void ErrorExpect (const char* Msg)
+/* Output an error message about some expected token using Msg and the
+ * description of the following token. This means that Msg should contain
+ * something like "xyz expected". The actual error message would then be
+ * "xyz expected but found zyx".
+ */
+{
+    StrBuf S = AUTO_STRBUF_INITIALIZER;
+    TokenDesc (&CurTok, &S);
+    Error ("%s but found `%s'", Msg, SB_GetConstBuf (&S));
+    SB_Done (&S);
+}
+
+
+
+int Expect (token_t Expected, const char* Msg)
+/* Check if the next token is the expected one. If not, print Msg plus some
+ * information about the token that was actually found. This means that Msg
+ * should contain something like "xyz expected". The actual error message would
+ * then be "xyz expected but found zyx".
+ * Returns true if the token was found, otherwise false.
+ */
+{
+    if (CurTok.Tok == Expected) {
+        return 1;
+    }
+
+    ErrorExpect (Msg);
+    return 0;
+}
+
+
+
+int ExpectSkip (token_t Expected, const char* Msg)
+/* Check if the next token is the expected one. If not, print Msg plus some
+ * information about the token that was actually found and skip the remainder
+ * of the line. This means that Msg should contain something like "xyz
+ * expected". The actual error message would then be "xyz expected but found
+ * zyx".
+ * Returns true if the token was found, otherwise false.
+ */
+{
+    if (CurTok.Tok == Expected) {
+        return 1;
+    }
+
+    ErrorExpect (Msg);
+    SkipUntilSep ();
+    return 0;
+}
+
+
+
+int ExpectSep (void)
+/* Check if we've reached a line separator. If so, return true. If not, output
+** an error and skip all tokens until the line separator is reached. Then
+** return false.
+*/
+{
+    if (!TokIsSep (CurTok.Tok)) {
+        /* Try to be helpful by giving information about the token that was
+         * unexpected.
+         */
+        ErrorExpect ("Expected `end-of-line'");
+        SkipUntilSep ();
+        return 0;
+    } else {
+        return 1;
+    }
+}
diff --git a/src/ca65/expect.h b/src/ca65/expect.h
new file mode 100644
index 000000000..4840eae3f
--- /dev/null
+++ b/src/ca65/expect.h
@@ -0,0 +1,83 @@
+/*****************************************************************************/
+/*                                                                           */
+/*                                 expect.h                                  */
+/*                                                                           */
+/*                      Print errors about expected tokens                   */
+/*                                                                           */
+/*                                                                           */
+/*                                                                           */
+/* (C) 2025,      Kugelfuhr                                                  */
+/*                                                                           */
+/*                                                                           */
+/* This software is provided 'as-is', without any expressed or implied       */
+/* warranty.  In no event will the authors be held liable for any damages    */
+/* arising from the use of this software.                                    */
+/*                                                                           */
+/* Permission is granted to anyone to use this software for any purpose,     */
+/* including commercial applications, and to alter it and redistribute it    */
+/* freely, subject to the following restrictions:                            */
+/*                                                                           */
+/* 1. The origin of this software must not be misrepresented; you must not   */
+/*    claim that you wrote the original software. If you use this software   */
+/*    in a product, an acknowledgment in the product documentation would be  */
+/*    appreciated but is not required.                                       */
+/* 2. Altered source versions must be plainly marked as such, and must not   */
+/*    be misrepresented as being the original software.                      */
+/* 3. This notice may not be removed or altered from any source              */
+/*    distribution.                                                          */
+/*                                                                           */
+/*****************************************************************************/
+
+
+
+#ifndef EXPECT_H
+#define EXPECT_H
+
+
+
+/* ca65 */
+#include "token.h"
+
+
+
+/*****************************************************************************/
+/*                                   Code                                    */
+/*****************************************************************************/
+
+
+
+void ErrorExpect (const char* Msg);
+/* Output an error message about some expected token using Msg and the
+ * description of the following token. This means that Msg should contain
+ * something like "xyz expected". The actual error message would then be
+ * "xyz expected but found zyx".
+ */
+
+int Expect (token_t Expected, const char* Msg);
+/* Check if the next token is the expected one. If not, print Msg plus some
+ * information about the token that was actually found. This means that Msg
+ * should contain something like "xyz expected". The actual error message would
+ * then be "xyz expected but found zyx".
+ * Returns true if the token was found, otherwise false.
+ */
+
+int ExpectSkip (token_t Expected, const char* Msg);
+/* Check if the next token is the expected one. If not, print Msg plus some
+ * information about the token that was actually found and skip the remainder
+ * of the line. This means that Msg should contain something like "xyz
+ * expected". The actual error message would then be "xyz expected but found
+ * zyx".
+ * Returns true if the token was found, otherwise false.
+ */
+
+int ExpectSep (void);
+/* Check if we've reached a line separator. If so, return true. If not, output
+** an error and skip all tokens until the line separator is reached. Then
+** return false.
+*/
+
+
+
+/* End of expect.h */
+
+#endif
diff --git a/src/ca65/expr.c b/src/ca65/expr.c
index 6b1b9fa12..1391eddbd 100644
--- a/src/ca65/expr.c
+++ b/src/ca65/expr.c
@@ -51,6 +51,7 @@
 
 /* ca65 */
 #include "error.h"
+#include "expect.h"
 #include "expr.h"
 #include "global.h"
 #include "instr.h"
@@ -778,7 +779,7 @@ static ExprNode* FuncAddrSize (void)
         /* Cheap local symbol */
         Sym = SymFindLocal (SymLast, &CurTok.SVal, SYM_FIND_EXISTING);
         if (Sym == 0) {
-            Error ("Unknown symbol or scope: '%m%p'", &CurTok.SVal);
+            Error ("Unknown symbol or scope: `%m%p'", &CurTok.SVal);
         } else {
             AddrSize = Sym->AddrSize;
         }
@@ -818,13 +819,13 @@ static ExprNode* FuncAddrSize (void)
         if (Sym) {
             AddrSize = Sym->AddrSize;
         } else {
-            Error ("Unknown symbol or scope: '%m%p%m%p'", &ScopeName, &Name);
+            Error ("Unknown symbol or scope: `%m%p%m%p'", &ScopeName, &Name);
         }
 
     }
 
     if (AddrSize == 0) {
-        Warning (1, "Unknown address size: '%m%p%m%p'", &ScopeName, &Name);
+        Warning (1, "Unknown address size: `%m%p%m%p'", &ScopeName, &Name);
     }
 
     /* Free the string buffers */
@@ -859,7 +860,7 @@ static ExprNode* FuncSizeOf (void)
         /* Cheap local symbol */
         Sym = SymFindLocal (SymLast, &CurTok.SVal, SYM_FIND_EXISTING);
         if (Sym == 0) {
-            Error ("Unknown symbol or scope: '%m%p'", &CurTok.SVal);
+            Error ("Unknown symbol or scope: `%m%p'", &CurTok.SVal);
         } else {
             SizeSym = GetSizeOfSymbol (Sym);
         }
@@ -911,7 +912,7 @@ static ExprNode* FuncSizeOf (void)
             if (Sym) {
                 SizeSym = GetSizeOfSymbol (Sym);
             } else {
-                Error ("Unknown symbol or scope: '%m%p%m%p'",
+                Error ("Unknown symbol or scope: `%m%p%m%p'",
                        &ScopeName, &Name);
             }
         }
@@ -919,7 +920,7 @@ static ExprNode* FuncSizeOf (void)
 
     /* Check if we have a size */
     if (SizeSym == 0 || !SymIsConst (SizeSym, &Size)) {
-        Error ("Size of '%m%p%m%p' is unknown", &ScopeName, &Name);
+        Error ("Size of `%m%p%m%p' is unknown", &ScopeName, &Name);
         Size = 0;
     }
 
@@ -1059,7 +1060,7 @@ static ExprNode* Function (ExprNode* (*F) (void))
     NextTok ();
 
     /* Expression must be enclosed in braces */
-    if (!ExpectSkip (TOK_LPAREN, "Expected '('")) {
+    if (!ExpectSkip (TOK_LPAREN, "Expected `('")) {
         return GenLiteral0 ();
     }
     NextTok ();
diff --git a/src/ca65/filetab.c b/src/ca65/filetab.c
index 4ca32631e..ce4b15c03 100644
--- a/src/ca65/filetab.c
+++ b/src/ca65/filetab.c
@@ -211,7 +211,7 @@ unsigned GetFileIndex (const StrBuf* Name)
 
     /* If we don't have this index, print a diagnostic and use the main file */
     if (F == 0) {
-        Error ("File name '%m%p' not found in file table", Name);
+        Error ("File name `%m%p' not found in file table", Name);
         return 0;
     } else {
         return F->Index;
@@ -316,7 +316,7 @@ static void CreateDepFile (const char* Name, FileType Types)
     /* Open the file */
     FILE* F = fopen (Name, "w");
     if (F == 0) {
-        Fatal ("Cannot open dependency file '%s': %s", Name, strerror (errno));
+        Fatal ("Cannot open dependency file `%s': %s", Name, strerror (errno));
     }
 
     /* Print the output file followed by a tab char */
diff --git a/src/ca65/instr.c b/src/ca65/instr.c
index 5bf1418c5..f32a2b968 100644
--- a/src/ca65/instr.c
+++ b/src/ca65/instr.c
@@ -1961,7 +1961,7 @@ static void PutLDM_m740 (const InsDesc* Ins)
     }
     Emit0 (Ins->BaseCode);
     EmitByte (A.Expr);
-    Consume (TOK_HASH, "'#' expected");
+    Consume (TOK_HASH, "`#' expected");
     EmitByte (Expression ());
 }
 
diff --git a/src/ca65/listing.c b/src/ca65/listing.c
index 9f2396612..b3f3d9282 100644
--- a/src/ca65/listing.c
+++ b/src/ca65/listing.c
@@ -304,7 +304,7 @@ void CreateListing (void)
     /* Open the real listing file */
     F = fopen (SB_GetConstBuf (&ListingName), "w");
     if (F == 0) {
-        Fatal ("Cannot open listing file '%s': %s",
+        Fatal ("Cannot open listing file `%s': %s",
                SB_GetConstBuf (&ListingName),
                strerror (errno));
     }
diff --git a/src/ca65/macro.c b/src/ca65/macro.c
index 55b718957..4f20fec83 100644
--- a/src/ca65/macro.c
+++ b/src/ca65/macro.c
@@ -45,6 +45,7 @@
 /* ca65 */
 #include "condasm.h"
 #include "error.h"
+#include "expect.h"
 #include "global.h"
 #include "instr.h"
 #include "istack.h"
@@ -380,7 +381,7 @@ static void MacSkipDef (unsigned Style, const FilePos* StartPos)
         int LastWasSep = 0;
         while (1) {
             if (CurTok.Tok == TOK_EOF) {
-                ErrorExpect ("Expected '.ENDMACRO'");
+                ErrorExpect ("Expected `.ENDMACRO'");
                 PNotification (StartPos, "Macro definition started here");
                 break;
             }
@@ -434,9 +435,9 @@ void MacDef (unsigned Style)
     Existing = HT_Find (&MacroTab, &CurTok.SVal);
     if (Existing != 0) {
         /* Macro is already defined */
-        Error ("A macro named '%m%p' is already defined", &CurTok.SVal);
+        Error ("A macro named `%m%p' is already defined", &CurTok.SVal);
         PNotification (&Existing->DefPos,
-                       "Previous definition of macro '%s' was here",
+                       "Previous definition of macro `%s' was here",
                        SB_GetConstBuf (&Existing->Name));
         /* Skip tokens until we reach the final .endmacro */
         MacSkipDef (Style, &StartPos);
@@ -478,7 +479,7 @@ void MacDef (unsigned Style)
 
                 while (1) {
                     if (SB_Compare (&List->Id, &CurTok.SVal) == 0) {
-                        Error ("Duplicate macro parameter '%m%p'", &CurTok.SVal);
+                        Error ("Duplicate macro parameter `%m%p'", &CurTok.SVal);
                         M->HasError = 1;
                     }
                     if (List->Next == 0) {
@@ -529,7 +530,7 @@ void MacDef (unsigned Style)
             }
             /* May not have end of file in a macro definition */
             if (CurTok.Tok == TOK_EOF) {
-                Error ("Missing '.ENDMACRO' for definition of macro '%s'",
+                Error ("Missing `.ENDMACRO' for definition of macro `%s'",
                        SB_GetConstBuf (&M->Name));
                 PNotification (&StartPos, "Macro definition started here");
                 M->HasError = 1;
@@ -645,11 +646,11 @@ void MacUndef (const StrBuf* Name, unsigned char Style)
 
     /* Don't let the user kid with us */
     if (M == 0 || M->Style != Style) {
-        Error ("No such macro: %m%p", Name);
+        Error ("No such macro: `%m%p'", Name);
         return;
     }
     if (M->Expansions > 0) {
-        Error ("Cannot delete macro '%s' which is currently expanded",
+        Error ("Cannot delete macro `%s' which is currently expanded",
                SB_GetConstBuf (&M->Name));
         return;
     }
@@ -837,10 +838,10 @@ static void StartExpClassic (MacExp* E)
 
             /* Check for maximum parameter count */
             if (E->ParamCount >= E->M->ParamCount) {
-                ErrorSkip ("Too many parameters for macro '%s'",
+                ErrorSkip ("Too many parameters for macro `%s'",
                            SB_GetConstBuf (&E->M->Name));
                 PNotification (&E->M->DefPos,
-                               "See definition of macro '%s' which was here",
+                               "See definition of macro `%s' which was here",
                                SB_GetConstBuf (&E->M->Name));
                 break;
             }
@@ -966,7 +967,7 @@ static void StartExpDefine (MacExp* E)
 
         /* Check for a comma */
         if (Count > 0) {
-            if (Expect (TOK_COMMA, "Expected ','")) {
+            if (Expect (TOK_COMMA, "Expected `,'")) {
                 NextTok ();
             }
         }
@@ -1000,18 +1001,18 @@ void MacExpandStart (Macro* M)
 
     /* We cannot expand a macro with errors */
     if (M->HasError) {
-        PError (&Pos, "Macro '%s' contains errors and cannot be expanded",
+        PError (&Pos, "Macro `%s' contains errors and cannot be expanded",
                 SB_GetConstBuf (&M->Name));
-        PNotification (&M->DefPos, "Definition of macro '%s' was here",
+        PNotification (&M->DefPos, "Definition of macro `%s' was here",
                        SB_GetConstBuf (&M->Name));
         return;
     }
 
     /* We cannot expand an incomplete macro */
     if (M->Incomplete) {
-        PError (&Pos, "Macro '%s' is incomplete and cannot be expanded",
+        PError (&Pos, "Macro `%s' is incomplete and cannot be expanded",
                 SB_GetConstBuf (&M->Name));
-        PNotification (&M->DefPos, "Definition of macro '%s' was here",
+        PNotification (&M->DefPos, "Definition of macro `%s' was here",
                        SB_GetConstBuf (&M->Name));
         return;
     }
@@ -1020,7 +1021,7 @@ void MacExpandStart (Macro* M)
     ** to force an endless loop and assembler crash.
     */
     if (MacExpansions >= MAX_MACEXPANSIONS) {
-        PError (&Pos, "Too many nested macro expansions for macro '%s'",
+        PError (&Pos, "Too many nested macro expansions for macro `%s'",
                 SB_GetConstBuf (&M->Name));
         return;
     }
diff --git a/src/ca65/main.c b/src/ca65/main.c
index f871f0ac8..15b6ec1f0 100644
--- a/src/ca65/main.c
+++ b/src/ca65/main.c
@@ -57,6 +57,7 @@
 #include "asserts.h"
 #include "dbginfo.h"
 #include "error.h"
+#include "expect.h"
 #include "expr.h"
 #include "feature.h"
 #include "filetab.h"
@@ -126,6 +127,7 @@ static void Usage (void)
             "  --listing name\t\tCreate a listing file if assembly was ok\n"
             "  --list-bytes n\t\tMaximum number of bytes per listing line\n"
             "  --memory-model model\t\tSet the memory model\n"
+            "  --no-utf8\t\t\tDisable use of UTF-8 in diagnostics\n"
             "  --pagelength n\t\tSet the page length for the listing\n"
             "  --relax-checks\t\tRelax some checks (see docs)\n"
             "  --smart\t\t\tEnable smart mode\n"
@@ -641,7 +643,7 @@ static void OptListing (const char* Opt, const char* Arg)
     ** the filename is empty or begins with the option char.
     */
     if (Arg == 0 || *Arg == '\0' || *Arg == '-') {
-        Fatal ("The meaning of '%s' has changed. It does now "
+        Fatal ("The meaning of `%s' has changed. It does now "
                "expect a file name as argument.", Opt);
     }
 
@@ -675,6 +677,15 @@ static void OptMemoryModel (const char* Opt, const char* Arg)
 
 
 
+static void OptNoUtf8 (const char* Opt attribute ((unused)),
+                       const char* Arg attribute ((unused)))
+/* Handle the --no-utf8 option */
+{
+    CP_DisableUTF8 ();
+}
+
+
+
 static void OptPageLength (const char* Opt attribute ((unused)), const char* Arg)
 /* Handle the --pagelength option */
 {
@@ -790,7 +801,7 @@ static void OneLine (void)
         if (CurTok.Tok == TOK_COLON) {
             NextTok ();
         } else if (CurTok.WS || !NoColonLabels) {
-            Error ("':' expected");
+            Error ("`:' expected");
         }
     }
 
@@ -876,7 +887,7 @@ static void OneLine (void)
             */
             if (CurTok.Tok != TOK_COLON) {
                 if (HadWS || !NoColonLabels) {
-                    ErrorExpect ("Expected ':' after identifier to form a label");
+                    ErrorExpect ("Expected `:' after identifier to form a label");
                     SkipUntilSep ();
                     goto Done;
                 }
@@ -921,7 +932,7 @@ static void OneLine (void)
         HandleInstruction (Instr);
     } else if (PCAssignment && (CurTok.Tok == TOK_STAR || CurTok.Tok == TOK_PC)) {
         NextTok ();
-        if (!ExpectSkip (TOK_EQ, "Expected '='")) {
+        if (!ExpectSkip (TOK_EQ, "Expected `='")) {
             goto Done;
         }
         /* Skip the equal sign */
@@ -1046,6 +1057,7 @@ int main (int argc, char* argv [])
         { "--list-bytes",          1,      OptListBytes            },
         { "--listing",             1,      OptListing              },
         { "--memory-model",        1,      OptMemoryModel          },
+        { "--no-utf8",             0,      OptNoUtf8               },
         { "--pagelength",          1,      OptPageLength           },
         { "--relax-checks",        0,      OptRelaxChecks          },
         { "--smart",               0,      OptSmart                },
diff --git a/src/ca65/nexttok.c b/src/ca65/nexttok.c
index 36cb9def1..89057725e 100644
--- a/src/ca65/nexttok.c
+++ b/src/ca65/nexttok.c
@@ -44,6 +44,7 @@
 /* ca65 */
 #include "condasm.h"
 #include "error.h"
+#include "expect.h"
 #include "expr.h"
 #include "global.h"
 #include "scanner.h"
@@ -179,7 +180,7 @@ static void FuncConcat (void)
     ** by the string token just created.
     */
     if (CurTok.Tok != TOK_RPAREN) {
-        Error ("')' expected");
+        Error ("`)' expected");
     } else {
         CurTok.Tok = TOK_STRCON;
         SB_Copy (&CurTok.SVal, &Buf);
@@ -253,7 +254,7 @@ static void FuncIdent (void)
     SB_Copy (&Buf, &CurTok.SVal);
     NextTok ();
     if (CurTok.Tok != TOK_RPAREN) {
-        Error ("')' expected");
+        Error ("`)' expected");
     } else {
         CurTok.Tok = Id;
         SB_Copy (&CurTok.SVal, &Buf);
@@ -600,7 +601,7 @@ static void FuncSPrintF (void)
     ** by the string token just created.
     */
     if (CurTok.Tok != TOK_RPAREN) {
-        Error ("')' expected");
+        Error ("`)' expected");
     } else {
         CurTok.Tok = TOK_STRCON;
         SB_Copy (&CurTok.SVal, &R);
@@ -660,7 +661,7 @@ static void FuncString (void)
     ** by the string token just created.
     */
     if (CurTok.Tok != TOK_RPAREN) {
-        Error ("')' expected");
+        Error ("`)' expected");
     } else {
         CurTok.Tok = TOK_STRCON;
         SB_Copy (&CurTok.SVal, &Buf);
@@ -725,59 +726,6 @@ void NextTok (void)
 
 
 
-void ErrorExpect (const char* Msg)
-/* Output an error message about some expected token using Msg and the
- * description of the following token. This means that Msg should contain
- * something like "xyz expected". The actual error message would then be
- * "xyz expected but found zyx".
- */
-{
-    StrBuf S = AUTO_STRBUF_INITIALIZER;
-    TokenDesc (&CurTok, &S);
-    Error ("%s but found '%s'", Msg, SB_GetConstBuf (&S));
-    SB_Done (&S);
-}
-
-
-
-int Expect (token_t Expected, const char* Msg)
-/* Check if the next token is the expected one. If not, print Msg plus some
- * information about the token that was actually found. This means that Msg
- * should contain something like "xyz expected". The actual error message would
- * then be "xyz expected but found zyx".
- * Returns true if the token was found, otherwise false.
- */
-{
-    if (CurTok.Tok == Expected) {
-        return 1;
-    }
-
-    ErrorExpect (Msg);
-    return 0;
-}
-
-
-
-int ExpectSkip (token_t Expected, const char* Msg)
-/* Check if the next token is the expected one. If not, print Msg plus some
- * information about the token that was actually found and skip the remainder
- * of the line. This means that Msg should contain something like "xyz
- * expected". The actual error message would then be "xyz expected but found
- * zyx".
- * Returns true if the token was found, otherwise false.
- */
-{
-    if (CurTok.Tok == Expected) {
-        return 1;
-    }
-
-    ErrorExpect (Msg);
-    SkipUntilSep ();
-    return 0;
-}
-
-
-
 int Consume (token_t Expected, const char* ErrMsg)
 /* Consume Token, print an error if we don't find it. Return true if the token
 ** was found and false otherwise.
@@ -816,7 +764,7 @@ int ConsumeLParen (void)
 ** otherwise.
 */
 {
-    return Consume (TOK_LPAREN, "Expected '('");
+    return Consume (TOK_LPAREN, "Expected `('");
 }
 
 
@@ -826,7 +774,7 @@ int ConsumeRParen (void)
 ** otherwise.
 */
 {
-    return Consume (TOK_RPAREN, "Expected ')'");
+    return Consume (TOK_RPAREN, "Expected `)'");
 }
 
 
@@ -836,7 +784,7 @@ int ConsumeComma (void)
 ** otherwise.
 */
 {
-    return Consume (TOK_COMMA, "Expected ','");
+    return Consume (TOK_COMMA, "Expected `,'");
 }
 
 
@@ -851,26 +799,6 @@ void SkipUntilSep (void)
 
 
 
-int ExpectSep (void)
-/* Check if we've reached a line separator. If so, return true. If not, output
-** an error and skip all tokens until the line separator is reached. Then
-** return false.
-*/
-{
-    if (!TokIsSep (CurTok.Tok)) {
-        /* Try to be helpful by giving information about the token that was
-         * unexpected.
-         */
-        ErrorExpect ("Expected 'end-of-line'");
-        SkipUntilSep ();
-        return 0;
-    } else {
-        return 1;
-    }
-}
-
-
-
 void EnterRawTokenMode (void)
 /* Enter raw token mode. In raw mode, token handling functions are not
 ** executed, but the function tokens are passed untouched to the upper
diff --git a/src/ca65/nexttok.h b/src/ca65/nexttok.h
index 3902db518..928339def 100644
--- a/src/ca65/nexttok.h
+++ b/src/ca65/nexttok.h
@@ -51,30 +51,6 @@
 void NextTok (void);
 /* Get next token and handle token level functions */
 
-void ErrorExpect (const char* Msg);
-/* Output an error message about some expected token using Msg and the
- * description of the following token. This means that Msg should contain
- * something like "xyz expected". The actual error message would then be
- * "xyz expected but found zyx".
- */
-
-int Expect (token_t Expected, const char* Msg);
-/* Check if the next token is the expected one. If not, print Msg plus some
- * information about the token that was actually found. This means that Msg
- * should contain something like "xyz expected". The actual error message would
- * then be "xyz expected but found zyx".
- * Returns true if the token was found, otherwise false.
- */
-
-int ExpectSkip (token_t Expected, const char* Msg);
-/* Check if the next token is the expected one. If not, print Msg plus some
- * information about the token that was actually found and skip the remainder
- * of the line. This means that Msg should contain something like "xyz
- * expected". The actual error message would then be "xyz expected but found
- * zyx".
- * Returns true if the token was found, otherwise false.
- */
-
 int Consume (token_t Expected, const char* ErrMsg);
 /* Consume Token, print an error if we don't find it. Return true if the token
 ** was found and false otherwise.
@@ -103,12 +79,6 @@ int ConsumeComma (void);
 void SkipUntilSep (void);
 /* Skip tokens until we reach a line separator or end of file */
 
-int ExpectSep (void);
-/* Check if we've reached a line separator. If so, return true. If not, output
-** an error and skip all tokens until the line separator is reached. Then
-** return false.
-*/
-
 void EnterRawTokenMode (void);
 /* Enter raw token mode. In raw mode, token handling functions are not
 ** executed, but the function tokens are passed untouched to the upper
diff --git a/src/ca65/objfile.c b/src/ca65/objfile.c
index b475d15df..dfa0d146e 100644
--- a/src/ca65/objfile.c
+++ b/src/ca65/objfile.c
@@ -113,7 +113,7 @@ static void ObjWriteError (void)
     remove (OutFile);
 
     /* Now abort with a fatal error */
-    Fatal ("Cannot write to output file '%s': %s", OutFile, strerror (Error));
+    Fatal ("Cannot write to output file `%s': %s", OutFile, strerror (Error));
 }
 
 
@@ -170,7 +170,7 @@ void ObjOpen (void)
     /* Create the output file */
     F = fopen (OutFile, "w+b");
     if (F == 0) {
-        Fatal ("Cannot open output file '%s': %s", OutFile, strerror (errno));
+        Fatal ("Cannot open output file `%s': %s", OutFile, strerror (errno));
     }
 
     /* Write a dummy header */
diff --git a/src/ca65/pseudo.c b/src/ca65/pseudo.c
index 145eb4963..5ce4e8c6e 100644
--- a/src/ca65/pseudo.c
+++ b/src/ca65/pseudo.c
@@ -60,6 +60,7 @@
 #include "dbginfo.h"
 #include "enum.h"
 #include "error.h"
+#include "expect.h"
 #include "expr.h"
 #include "feature.h"
 #include "filetab.h"
@@ -1038,13 +1039,13 @@ static void DoFeature (void)
         Feature = FindFeature (&CurTok.SVal);
         if (Feature == FEAT_UNKNOWN) {
             /* Not found */
-            ErrorSkip ("Invalid feature: '%m%p'", &CurTok.SVal);
+            ErrorSkip ("Invalid feature: `%m%p'", &CurTok.SVal);
             return;
         }
 
         if (Feature == FEAT_ADDRSIZE) {
-            Warning (1, "Deprecated feature: '.feature addrsize'. "
-                     "Pseudo function .addrsize is always available.");
+            Warning (1, "Deprecated feature `addrsize'");
+            Notification ("Pseudo function `.addrsize' is always available");
         }
 
         NextTok ();
@@ -1270,7 +1271,7 @@ static void DoIncBin (void)
         char* PathName = SearchFile (BinSearchPath, SB_GetConstBuf (&Name));
         if (PathName == 0 || (F = fopen (PathName, "rb")) == 0) {
             /* Not found or cannot open, print an error and bail out */
-            ErrorSkip ("Cannot open include file '%m%p': %s", &Name, strerror (errno));
+            ErrorSkip ("Cannot open include file `%m%p': %s", &Name, strerror (errno));
             xfree (PathName);
             goto ExitPoint;
         }
@@ -1296,7 +1297,7 @@ static void DoIncBin (void)
     */
     SB_Terminate (&Name);
     if (FileStat (SB_GetConstBuf (&Name), &StatBuf) != 0) {
-        Fatal ("Cannot stat input file '%m%p': %s", &Name, strerror (errno));
+        Fatal ("Cannot stat input file `%m%p': %s", &Name, strerror (errno));
     }
 
     /* Add the file to the input file table */
@@ -1336,7 +1337,7 @@ static void DoIncBin (void)
         size_t BytesRead = fread (Buf, 1, BytesToRead, F);
         if (BytesToRead != BytesRead) {
             /* Some sort of error */
-            ErrorSkip ("Cannot read from include file '%m%p': %s",
+            ErrorSkip ("Cannot read from include file `%m%p': %s",
                        &Name, strerror (errno));
             break;
         }
@@ -2019,7 +2020,7 @@ static void DoUnDef (void)
 static void DoUnexpected (void)
 /* Got an unexpected keyword */
 {
-    Error ("Unexpected '%m%p'", &Keyword);
+    Error ("Unexpected `%m%p'", &Keyword);
     SkipUntilSep ();
 }
 
diff --git a/src/ca65/repeat.c b/src/ca65/repeat.c
index c2fb7d9fa..492aad126 100644
--- a/src/ca65/repeat.c
+++ b/src/ca65/repeat.c
@@ -40,6 +40,7 @@
 
 /* ca65 */
 #include "error.h"
+#include "expect.h"
 #include "expr.h"
 #include "nexttok.h"
 #include "toklist.h"
@@ -67,8 +68,8 @@ static TokList* CollectRepeatTokens (const FilePos* StartPos)
 
         /* Check for end of input */
         if (CurTok.Tok == TOK_EOF) {
-            ErrorExpect ("Expected '.ENDREPEAT'");
-            PNotification (StartPos, "For this '.REPEAT' command");
+            ErrorExpect ("Expected `.ENDREPEAT'");
+            PNotification (StartPos, "For this `.REPEAT' command");
             FreeTokList (List);
             return 0;
         }
diff --git a/src/ca65/scanner.c b/src/ca65/scanner.c
index b56b17401..0087e2be3 100644
--- a/src/ca65/scanner.c
+++ b/src/ca65/scanner.c
@@ -52,6 +52,7 @@
 /* ca65 */
 #include "condasm.h"
 #include "error.h"
+#include "expect.h"
 #include "filetab.h"
 #include "global.h"
 #include "incpath.h"
@@ -545,7 +546,7 @@ int NewInputFile (const char* Name)
         /* Main file */
         F = fopen (Name, "r");
         if (F == 0) {
-            Fatal ("Cannot open input file '%s': %s", Name, strerror (errno));
+            Fatal ("Cannot open input file `%s': %s", Name, strerror (errno));
         }
     } else {
         /* We are on include level. Search for the file in the include
@@ -554,7 +555,7 @@ int NewInputFile (const char* Name)
         PathName = SearchFile (IncSearchPath, Name);
         if (PathName == 0 || (F = fopen (PathName, "r")) == 0) {
             /* Not found or cannot open, print an error and bail out */
-            Error ("Cannot open include file '%s': %s", Name, strerror (errno));
+            Error ("Cannot open include file `%s': %s", Name, strerror (errno));
             goto ExitPoint;
         }
 
@@ -571,7 +572,7 @@ int NewInputFile (const char* Name)
     ** here.
     */
     if (FileStat (Name, &Buf) != 0) {
-        Fatal ("Cannot stat input file '%s': %s", Name, strerror (errno));
+        Fatal ("Cannot stat input file `%s': %s", Name, strerror (errno));
     }
 
     /* Add the file to the input file table and remember the index */
@@ -1196,7 +1197,7 @@ Again:
                 /* Not found */
                 if (!LeadingDotInIdents) {
                     /* Invalid pseudo instruction */
-                    Error ("'%m%p' is not a recognized control command", &CurTok.SVal);
+                    Error ("`%m%p' is not a recognized control command", &CurTok.SVal);
                     goto Again;
                 }
 
@@ -1686,14 +1687,14 @@ unsigned char ParseAddrSize (void)
 
     /* Check for an identifier */
     if (CurTok.Tok != TOK_IDENT) {
-        Error ("Address size specifier expected");
+        ErrorExpect ("Expected an address size specifier");
         return ADDR_SIZE_DEFAULT;
     }
 
     /* Convert the attribute */
     AddrSize = AddrSizeFromStr (SB_GetConstBuf (&CurTok.SVal));
     if (AddrSize == ADDR_SIZE_INVALID) {
-        Error ("Address size specifier expected");
+        ErrorExpect ("Expected an address size specifier");
         AddrSize = ADDR_SIZE_DEFAULT;
     }
 
diff --git a/src/ca65/segment.c b/src/ca65/segment.c
index aadc35009..bd0838951 100644
--- a/src/ca65/segment.c
+++ b/src/ca65/segment.c
@@ -134,7 +134,7 @@ static Segment* NewSegment (const char* Name, unsigned char AddrSize)
 
     /* Check the segment name for invalid names */
     if (!ValidSegName (Name)) {
-        Error ("Illegal segment name: '%s'", Name);
+        Error ("Illegal segment name: `%s'", Name);
     }
 
     /* Create a new segment and return it */
diff --git a/src/ca65/struct.c b/src/ca65/struct.c
index 0ec4ae916..d755aa4bf 100644
--- a/src/ca65/struct.c
+++ b/src/ca65/struct.c
@@ -39,6 +39,7 @@
 /* ca65 */
 #include "condasm.h"
 #include "error.h"
+#include "expect.h"
 #include "expr.h"
 #include "macro.h"
 #include "nexttok.h"
@@ -287,9 +288,9 @@ static long DoStructInternal (long Offs, unsigned Type)
 
     /* End of struct/union definition */
     if (Type == STRUCT) {
-        Consume (TOK_ENDSTRUCT, "Expected '.ENDSTRUCT'");
+        Consume (TOK_ENDSTRUCT, "Expected `.ENDSTRUCT'");
     } else {
-        Consume (TOK_ENDUNION, "Expected '.ENDUNION'");
+        Consume (TOK_ENDUNION, "Expected `.ENDUNION'");
     }
 
     /* Return the size of the struct */
diff --git a/src/ca65/studyexpr.c b/src/ca65/studyexpr.c
index 6c297f4df..11e4ca2f9 100644
--- a/src/ca65/studyexpr.c
+++ b/src/ca65/studyexpr.c
@@ -593,7 +593,7 @@ static void StudySymbol (ExprNode* Expr, ExprDesc* D)
 
         if (SymHasUserMark (Sym)) {
             LIError (&Sym->DefLines,
-                     "Circular reference in definition of symbol '%m%p'",
+                     "Circular reference in definition of symbol `%m%p'",
                      GetSymName (Sym));
             ED_SetError (D);
         } else {
diff --git a/src/ca65/symbol.c b/src/ca65/symbol.c
index 974323d7c..982e8c29f 100644
--- a/src/ca65/symbol.c
+++ b/src/ca65/symbol.c
@@ -40,6 +40,7 @@
 
 /* ca65 */
 #include "error.h"
+#include "expect.h"
 #include "nexttok.h"
 #include "scanner.h"
 #include "symbol.h"
@@ -95,7 +96,7 @@ SymTable* ParseScopedIdent (StrBuf* Name, StrBuf* FullName)
         if (Scope == 0) {
             /* Scope not found */
             SB_Terminate (FullName);
-            Error ("No such scope: '%m%p'", FullName);
+            Error ("No such scope: `%m%p'", FullName);
             return 0;
         }
 
@@ -138,7 +139,7 @@ SymTable* ParseScopedIdent (StrBuf* Name, StrBuf* FullName)
         Scope = SymFindScope (Scope, Name, SYM_FIND_EXISTING);
         if (Scope == 0) {
             /* Scope not found */
-            Error ("No such scope: '%m%p'", FullName);
+            Error ("No such scope: `%m%p'", FullName);
             return 0;
         }
 
diff --git a/src/ca65/symentry.c b/src/ca65/symentry.c
index dd18fc765..38063b25d 100644
--- a/src/ca65/symentry.c
+++ b/src/ca65/symentry.c
@@ -215,7 +215,7 @@ void SymDef (SymEntry* S, ExprNode* Expr, unsigned char AddrSize, unsigned Flags
 
     if (S->Flags & SF_IMPORT) {
         /* Defined symbol is marked as imported external symbol */
-        Error ("Symbol '%m%p' is already an import", GetSymName (S));
+        Error ("Symbol `%m%p' is already an import", GetSymName (S));
         if (CollCount (&S->DefLines) > 0) {
             PNotification (GetSourcePos (CollAt(&S->DefLines, 0)),
                            "The symbol was previously imported here");
@@ -224,13 +224,13 @@ void SymDef (SymEntry* S, ExprNode* Expr, unsigned char AddrSize, unsigned Flags
     }
     if ((Flags & SF_VAR) != 0 && (S->Flags & (SF_EXPORT | SF_GLOBAL))) {
         /* Variable symbols cannot be exports or globals */
-        Error ("Var symbol '%m%p' cannot be an export or global symbol", GetSymName (S));
+        Error ("Var symbol `%m%p' cannot be an export or global symbol", GetSymName (S));
         return;
     }
     if (S->Flags & SF_DEFINED) {
         /* Multiple definition. In case of a variable, this is legal. */
         if ((S->Flags & SF_VAR) == 0) {
-            Error ("Symbol '%m%p' is already defined", GetSymName (S));
+            Error ("Symbol `%m%p' is already defined", GetSymName (S));
             if (CollCount (&S->DefLines) > 0) {
                 PNotification (GetSourcePos (CollAt(&S->DefLines, 0)),
                                "The symbol was previously defined here");
@@ -240,7 +240,7 @@ void SymDef (SymEntry* S, ExprNode* Expr, unsigned char AddrSize, unsigned Flags
         } else {
             /* Redefinition must also be a variable symbol */
             if ((Flags & SF_VAR) == 0) {
-                Error ("Symbol '%m%p' is already different kind", GetSymName (S));
+                Error ("Symbol `%m%p' is already different kind", GetSymName (S));
                 return;
             }
             /* Delete the current symbol expression, since it will get
@@ -296,7 +296,7 @@ void SymDef (SymEntry* S, ExprNode* Expr, unsigned char AddrSize, unsigned Flags
             S->ExportSize = S->AddrSize;
         } else if (S->AddrSize > S->ExportSize) {
             /* We're exporting a symbol smaller than it actually is */
-            Warning (1, "Symbol '%m%p' is %s but exported %s",
+            Warning (1, "Symbol `%m%p' is %s but exported %s",
                      GetSymName (S), AddrSizeToStr (S->AddrSize),
                      AddrSizeToStr (S->ExportSize));
         }
@@ -328,13 +328,13 @@ void SymImport (SymEntry* S, unsigned char AddrSize, unsigned Flags)
 /* Mark the given symbol as an imported symbol */
 {
     if (S->Flags & SF_DEFINED) {
-        Error ("Symbol '%m%p' is already defined", GetSymName (S));
+        Error ("Symbol `%m%p' is already defined", GetSymName (S));
         S->Flags |= SF_MULTDEF;
         return;
     }
     if (S->Flags & SF_EXPORT) {
         /* The symbol is already marked as exported symbol */
-        Error ("Cannot import exported symbol '%m%p'", GetSymName (S));
+        Error ("Cannot import exported symbol `%m%p'", GetSymName (S));
         return;
     }
 
@@ -350,16 +350,16 @@ void SymImport (SymEntry* S, unsigned char AddrSize, unsigned Flags)
     */
     if (S->Flags & SF_IMPORT) {
         if ((Flags & SF_FORCED) != (S->Flags & SF_FORCED)) {
-            Error ("Redeclaration mismatch for symbol '%m%p'", GetSymName (S));
+            Error ("Redeclaration mismatch for symbol `%m%p'", GetSymName (S));
         }
         if (AddrSize != S->AddrSize) {
-            Error ("Address size mismatch for symbol '%m%p'", GetSymName (S));
+            Error ("Address size mismatch for symbol `%m%p'", GetSymName (S));
         }
     }
     if (S->Flags & SF_GLOBAL) {
         S->Flags &= ~SF_GLOBAL;
         if (AddrSize != S->AddrSize) {
-            Error ("Address size mismatch for symbol '%m%p'", GetSymName (S));
+            Error ("Address size mismatch for symbol `%m%p'", GetSymName (S));
         }
     }
 
@@ -382,12 +382,12 @@ void SymExport (SymEntry* S, unsigned char AddrSize, unsigned Flags)
     /* Check if it's ok to export the symbol */
     if (S->Flags & SF_IMPORT) {
         /* The symbol is already marked as imported external symbol */
-        Error ("Symbol '%m%p' is already an import", GetSymName (S));
+        Error ("Symbol `%m%p' is already an import", GetSymName (S));
         return;
     }
     if (S->Flags & SF_VAR) {
         /* Variable symbols cannot be exported */
-        Error ("Var symbol '%m%p' cannot be exported", GetSymName (S));
+        Error ("Var symbol `%m%p' cannot be exported", GetSymName (S));
         return;
     }
 
@@ -396,7 +396,7 @@ void SymExport (SymEntry* S, unsigned char AddrSize, unsigned Flags)
     */
     if (S->Flags & SF_GLOBAL) {
         if (AddrSize != S->ExportSize) {
-            Error ("Address size mismatch for symbol '%m%p'", GetSymName (S));
+            Error ("Address size mismatch for symbol `%m%p'", GetSymName (S));
         }
         S->Flags &= ~SF_GLOBAL;
 
@@ -411,7 +411,7 @@ void SymExport (SymEntry* S, unsigned char AddrSize, unsigned Flags)
     */
     if ((S->Flags & (SF_EXPORT|SF_DEFINED)) == SF_EXPORT) {
         if (S->ExportSize != AddrSize) {
-            Error ("Address size mismatch for symbol '%m%p'", GetSymName (S));
+            Error ("Address size mismatch for symbol `%m%p'", GetSymName (S));
         }
     }
     S->ExportSize = AddrSize;
@@ -425,7 +425,7 @@ void SymExport (SymEntry* S, unsigned char AddrSize, unsigned Flags)
             S->ExportSize = S->AddrSize;
         } else if (S->AddrSize > S->ExportSize) {
             /* We're exporting a symbol smaller than it actually is */
-            Warning (1, "Symbol '%m%p' is %s but exported %s",
+            Warning (1, "Symbol `%m%p' is %s but exported %s",
                      GetSymName (S), AddrSizeToStr (S->AddrSize),
                      AddrSizeToStr (S->ExportSize));
         }
@@ -447,7 +447,7 @@ void SymGlobal (SymEntry* S, unsigned char AddrSize, unsigned Flags)
 {
     if (S->Flags & SF_VAR) {
         /* Variable symbols cannot be exported or imported */
-        Error ("Var symbol '%m%p' cannot be made global", GetSymName (S));
+        Error ("Var symbol `%m%p' cannot be made global", GetSymName (S));
         return;
     }
 
@@ -460,7 +460,7 @@ void SymGlobal (SymEntry* S, unsigned char AddrSize, unsigned Flags)
             AddrSize = GetCurrentSegAddrSize ();
         }
         if (AddrSize != S->AddrSize) {
-            Error ("Address size mismatch for symbol '%m%p'", GetSymName (S));
+            Error ("Address size mismatch for symbol `%m%p'", GetSymName (S));
         }
         return;
     }
@@ -472,12 +472,12 @@ void SymGlobal (SymEntry* S, unsigned char AddrSize, unsigned Flags)
         if ((S->Flags & SF_DEFINED) == 0) {
             /* Symbol is undefined */
             if (AddrSize != S->ExportSize) {
-                Error ("Address size mismatch for symbol '%m%p'", GetSymName (S));
+                Error ("Address size mismatch for symbol `%m%p'", GetSymName (S));
             }
         } else if (AddrSize != ADDR_SIZE_DEFAULT) {
             /* Symbol is defined and address size given */
             if (AddrSize != S->ExportSize) {
-                Error ("Address size mismatch for symbol '%m%p'", GetSymName (S));
+                Error ("Address size mismatch for symbol `%m%p'", GetSymName (S));
             }
         }
         return;
@@ -489,7 +489,7 @@ void SymGlobal (SymEntry* S, unsigned char AddrSize, unsigned Flags)
     */
     if (S->Flags & SF_GLOBAL) {
         if (AddrSize != S->ExportSize) {
-            Error ("Address size mismatch for symbol '%m%p'", GetSymName (S));
+            Error ("Address size mismatch for symbol `%m%p'", GetSymName (S));
         }
         return;
     }
@@ -507,7 +507,7 @@ void SymGlobal (SymEntry* S, unsigned char AddrSize, unsigned Flags)
             S->ExportSize = S->AddrSize;
         } else if (S->AddrSize > S->ExportSize) {
             /* We're exporting a symbol smaller than it actually is */
-            Warning (1, "Symbol '%m%p' is %s but exported %s",
+            Warning (1, "Symbol `%m%p' is %s but exported %s",
                      GetSymName (S), AddrSizeToStr (S->AddrSize),
                      AddrSizeToStr (S->ExportSize));
         }
@@ -550,12 +550,12 @@ void SymConDes (SymEntry* S, unsigned char AddrSize, unsigned Type, unsigned Pri
     /* Check for errors */
     if (S->Flags & SF_IMPORT) {
         /* The symbol is already marked as imported external symbol */
-        Error ("Symbol '%m%p' is already an import", GetSymName (S));
+        Error ("Symbol `%m%p' is already an import", GetSymName (S));
         return;
     }
     if (S->Flags & SF_VAR) {
         /* Variable symbols cannot be exported or imported */
-        Error ("Var symbol '%m%p' cannot be exported", GetSymName (S));
+        Error ("Var symbol `%m%p' cannot be exported", GetSymName (S));
         return;
     }
 
@@ -567,7 +567,7 @@ void SymConDes (SymEntry* S, unsigned char AddrSize, unsigned Type, unsigned Pri
             /* Use the real size of the symbol */
             AddrSize = S->AddrSize;
         } else if (S->AddrSize != AddrSize) {
-            Error ("Address size mismatch for symbol '%m%p'", GetSymName (S));
+            Error ("Address size mismatch for symbol `%m%p'", GetSymName (S));
         }
     }
 
@@ -577,7 +577,7 @@ void SymConDes (SymEntry* S, unsigned char AddrSize, unsigned Type, unsigned Pri
     */
     if (S->Flags & (SF_EXPORT | SF_GLOBAL)) {
         if (S->ExportSize != AddrSize) {
-            Error ("Address size mismatch for symbol '%m%p'", GetSymName (S));
+            Error ("Address size mismatch for symbol `%m%p'", GetSymName (S));
         }
         S->Flags &= ~SF_GLOBAL;
     }
@@ -588,7 +588,7 @@ void SymConDes (SymEntry* S, unsigned char AddrSize, unsigned Type, unsigned Pri
     */
     if (S->ConDesPrio[Type] != CD_PRIO_NONE) {
         if (S->ConDesPrio[Type] != Prio) {
-            Error ("Redeclaration mismatch for symbol '%m%p'", GetSymName (S));
+            Error ("Redeclaration mismatch for symbol `%m%p'", GetSymName (S));
         }
     }
     S->ConDesPrio[Type] = Prio;
diff --git a/src/ca65/symtab.c b/src/ca65/symtab.c
index a01d14bd8..977943179 100644
--- a/src/ca65/symtab.c
+++ b/src/ca65/symtab.c
@@ -178,7 +178,7 @@ static SymTable* NewSymTable (SymTable* Parent, const StrBuf* Name)
                     }
                 } else {
                     /* Duplicate scope name */
-                    Internal ("Duplicate scope name: '%m%p'", Name);
+                    Internal ("Duplicate scope name: `%m%p'", Name);
                 }
             }
         }
@@ -216,7 +216,7 @@ void SymEnterLevel (const StrBuf* ScopeName, unsigned char Type,
 
         /* Check if the scope has been defined before */
         if (CurrentScope->Flags & ST_DEFINED) {
-            Error ("Duplicate scope '%m%p'", ScopeName);
+            Error ("Duplicate scope `%m%p'", ScopeName);
         }
 
     } else {
@@ -502,7 +502,7 @@ static void SymCheckUndefined (SymEntry* S)
             if (Sym->Flags & SF_IMPORT) {
                 /* The symbol is already marked as import */
                 LIError (&S->RefLines,
-                         "Symbol '%s' is already an import",
+                         "Symbol `%s' is already an import",
                          GetString (Sym->Name));
             }
             if ((Sym->Flags & SF_EXPORT) == 0) {
@@ -516,7 +516,7 @@ static void SymCheckUndefined (SymEntry* S)
                 if (Sym->AddrSize > Sym->ExportSize) {
                     /* We're exporting a symbol smaller than it actually is */
                     LIWarning (&Sym->DefLines, 1,
-                               "Symbol '%m%p' is %s but exported %s",
+                               "Symbol `%m%p' is %s but exported %s",
                                GetSymName (Sym),
                                AddrSizeToStr (Sym->AddrSize),
                                AddrSizeToStr (Sym->ExportSize));
@@ -541,7 +541,7 @@ static void SymCheckUndefined (SymEntry* S)
         if (S->Flags & SF_EXPORT) {
             /* We will not auto-import an export */
             LIError (&S->RefLines,
-                     "Exported symbol '%m%p' was never defined",
+                     "Exported symbol `%m%p' was never defined",
                      GetSymName (S));
         } else {
             if (AutoImport) {
@@ -554,7 +554,7 @@ static void SymCheckUndefined (SymEntry* S)
             } else {
                 /* Error */
                 LIError (&S->RefLines,
-                         "Symbol '%m%p' is undefined",
+                         "Symbol `%m%p' is undefined",
                          GetSymName (S));
             }
         }
@@ -573,13 +573,13 @@ void SymCheck (void)
         if (CurrentScope->Label) {
             /* proc has a label indicating the line it was opened. */
             LIError (&CurrentScope->Label->DefLines,
-                     "Local proc '%s' was not closed",
+                     "Local proc `%s' was not closed",
                      GetString (CurrentScope->Name));
         } else {
             /* scope has no label to track a line number, uses end-of-document line instead.
             ** Anonymous scopes will reveal their internal automatic name.
             */
-            Error ("Local scope '%s' was not closed",
+            Error ("Local scope `%s' was not closed",
                    GetString (CurrentScope->Name));
         }
     }
@@ -627,7 +627,7 @@ void SymCheck (void)
                 ReleaseFullLineInfo (&S->RefLines);
             } else if ((S->Flags & SF_DEFINED) != 0 && (S->Flags & SF_REFERENCED) == 0) {
                 LIWarning (&S->DefLines, 2,
-                           "Symbol '%m%p' is defined but never used",
+                           "Symbol `%m%p' is defined but never used",
                            GetSymName (S));
             }
 
@@ -636,7 +636,7 @@ void SymCheck (void)
                 if ((S->Flags & (SF_REFERENCED | SF_FORCED)) == SF_NONE) {
                     /* Imported symbol is not referenced */
                     LIWarning (&S->DefLines, 2,
-                               "Symbol '%m%p' is imported but never used",
+                               "Symbol `%m%p' is imported but never used",
                                GetSymName (S));
                 } else {
                     /* Give the import an id, count imports */
@@ -664,7 +664,7 @@ void SymCheck (void)
                     } else if (S->AddrSize > S->ExportSize) {
                         /* We're exporting a symbol smaller than it actually is */
                         LIWarning (&S->DefLines, 1,
-                                   "Symbol '%m%p' is %s but exported %s",
+                                   "Symbol `%m%p' is %s but exported %s",
                                    GetSymName (S),
                                    AddrSizeToStr (S->AddrSize),
                                    AddrSizeToStr (S->ExportSize));
@@ -684,7 +684,7 @@ void SymCheck (void)
                     const FilePos* P = S->GuessedUse[S->AddrSize - 1];
                     if (P) {
                         PWarning (P, 0,
-                                  "Didn't use %s addressing for '%m%p'",
+                                  "Didn't use %s addressing for `%m%p'",
                                   AddrSizeToStr (S->AddrSize),
                                   GetSymName (S));
                     }

From 8d7c87f753aee16fa370ab3d7e34cff72aefc757 Mon Sep 17 00:00:00 2001
From: Kugel Fuhr <98353208+kugelfuhr@users.noreply.github.com>
Date: Tue, 8 Jul 2025 07:31:24 +0200
Subject: [PATCH 04/13] Fix problem with UTF-8 output when switching the code
 page under windows fails.

---
 src/common/consprop.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/common/consprop.c b/src/common/consprop.c
index 03ecb449d..9dceef1b3 100644
--- a/src/common/consprop.c
+++ b/src/common/consprop.c
@@ -127,8 +127,9 @@ void CP_Init (void)
 #ifdef _WIN32
     if (IsTTY) {
         CodePage = GetConsoleOutputCP ();
-        if (SetConsoleOutputCP (CP_UTF8)) {
-            IsUTF8 = 1;
+        IsUTF8 = (int) SetConsoleOutputCP (CP_UTF8);
+	if (IsUTF8) {
+	    /* Switch the code page back on exit */
             atexit (Cleanup);
         }
         if (Color) {

From 8c654193f79b73270a4630e9615da905b35130f1 Mon Sep 17 00:00:00 2001
From: Kugel Fuhr <98353208+kugelfuhr@users.noreply.github.com>
Date: Tue, 8 Jul 2025 07:31:55 +0200
Subject: [PATCH 05/13] For the assembler tests, switch off UTF-8 output so we
 have always the identical diagnostics indepdendent of the console properties.

---
 test/asm/listing/Makefile | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/test/asm/listing/Makefile b/test/asm/listing/Makefile
index 202a44011..bcd325c62 100644
--- a/test/asm/listing/Makefile
+++ b/test/asm/listing/Makefile
@@ -73,7 +73,7 @@ $(WORKDIR)/$1.bin: $1.s $(ISEQUAL)
 
 #	compile without generating listing
 ifeq ($(wildcard control/$1.err),)
-	$(CA65) -t none -o $$(@:.bin=.o) $$< > $$(@:.bin=.err) 2> $$(@:.bin=.err2)
+	$(CA65) -t none --no-utf8 -o $$(@:.bin=.o) $$< > $$(@:.bin=.err) 2> $$(@:.bin=.err2)
 ifeq ($(wildcard control/$1.no-ld65),)
 ifeq ($(wildcard $1.cfg),)
 	$(LD65) -t none -o $$@ $$(@:.bin=.o) none.lib > $$(@:.bin=.ld65-err) 2> $$(@:.bin=.ld65-err2)
@@ -82,7 +82,7 @@ else
 endif
 endif
 else
-	$(CA65) -t none -o $$(@:.bin=.o) $$< > $$(@:.bin=.err) 2> $$(@:.bin=.err2) || $(TRUE)
+	$(CA65) -t none --no-utf8 -o $$(@:.bin=.o) $$< > $$(@:.bin=.err) 2> $$(@:.bin=.err2) || $(TRUE)
 ifeq ($(wildcard control/$1.no-ld65),)
 ifeq ($(wildcard $1.cfg),)
 	$(LD65) -t none -o $$@ $$(@:.bin=.o) none.lib > $$(@:.bin=.ld65-err) 2> $$(@:.bin=.ld65-err2) || $(TRUE)
@@ -144,7 +144,7 @@ endif
 
 #	compile with listing file
 ifeq ($(wildcard control/$1.err),)
-	$(CA65) -t none -l $$(@:.bin=.list-lst) -o $$(@:.bin=.list-o) $$< > $$(@:.bin=.list-err) 2> $$(@:.bin=.list-err2)
+	$(CA65) -t none --no-utf8 -l $$(@:.bin=.list-lst) -o $$(@:.bin=.list-o) $$< > $$(@:.bin=.list-err) 2> $$(@:.bin=.list-err2)
 ifeq ($(wildcard control/$1.no-ld65),)
 ifeq ($(wildcard $1.cfg),)
 	$(LD65) -t none -o $$(@:.bin=.list-bin) $$(@:.bin=.list-o) none.lib > $$(@:.bin=.list-ld65-err) 2> $$(@:.bin=.list-ld65-err2)
@@ -153,7 +153,7 @@ else
 endif
 endif
 else
-	$(CA65) -t none -l $$(@:.bin=.list-lst) -o $$(@:.bin=.list-o) $$< > $$(@:.bin=.list-err) 2> $$(@:.bin=.list-err2) || $(TRUE)
+	$(CA65) -t none --no-utf8 -l $$(@:.bin=.list-lst) -o $$(@:.bin=.list-o) $$< > $$(@:.bin=.list-err) 2> $$(@:.bin=.list-err2) || $(TRUE)
 ifeq ($(wildcard control/$1.no-ld65),)
 ifeq ($(wildcard $1.cfg),)
 	$(LD65) -t none -o $$(@:.bin=.list-bin) $$(@:.bin=.list-o) none.lib > $$(@:.bin=.list-ld65-err) 2> $$(@:.bin=.list-ld65-err2) || $(TRUE)

From 7e97e99bae6037d4fd96cfba44300be592467a06 Mon Sep 17 00:00:00 2001
From: Kugel Fuhr <98353208+kugelfuhr@users.noreply.github.com>
Date: Tue, 8 Jul 2025 08:23:32 +0200
Subject: [PATCH 06/13] Do also color quoted text.

---
 src/ca65/error.c | 27 +++++++++++++++++++++------
 1 file changed, 21 insertions(+), 6 deletions(-)

diff --git a/src/ca65/error.c b/src/ca65/error.c
index 85f6296f8..1756fddf3 100644
--- a/src/ca65/error.c
+++ b/src/ca65/error.c
@@ -100,6 +100,10 @@ static void ReplaceQuotes (StrBuf* Msg)
     static const char QuoteStart[] = "\xE2\x80\x98";
     static const char QuoteEnd[]   = "\xE2\x80\x99";
 
+    /* ANSI color sequences */
+    const char* ColorStart = CP_BrightGreen ();
+    const char* ColorEnd   = CP_White ();
+
     /* Remember a few things */
     int IsUTF8 = CP_IsUTF8 ();
 
@@ -113,18 +117,29 @@ static void ReplaceQuotes (StrBuf* Msg)
         char C = SB_Get (Msg);
         switch (C) {
             case '`':
-                if (!InQuote && IsUTF8) {
-                    SB_AppendStr (&T, QuoteStart);
+                if (!InQuote) {
                     InQuote = 1;
+                    if (IsUTF8) {
+                        SB_AppendStr (&T, QuoteStart);
+                    } else {
+                        /* ca65 uses \' for opening and closing quotes */
+                        SB_AppendChar (&T, '\'');
+                    }
+                    SB_AppendStr (&T, ColorStart);
                 } else {
-                    /* ca65 uses \' for opening and closing quotes */
-                    SB_AppendChar (&T, '\'');
+                    /* Found two ` without closing quote - don't replace */
+                    SB_AppendChar (&T, '`');
                 }
                 break;
             case '\'':
-                if (InQuote && IsUTF8) {
-                    SB_AppendStr (&T, QuoteEnd);
+                if (InQuote) {
                     InQuote = 0;
+                    SB_AppendStr (&T, ColorEnd);
+                    if (IsUTF8) {
+                        SB_AppendStr (&T, QuoteEnd);
+                    } else {
+                        SB_AppendChar (&T, C);
+                    }
                 } else {
                     SB_AppendChar (&T, C);
                 }

From 97ef430053f191c13beee06f05a9e7e828559240 Mon Sep 17 00:00:00 2001
From: Kugel Fuhr <98353208+kugelfuhr@users.noreply.github.com>
Date: Tue, 8 Jul 2025 09:35:42 +0200
Subject: [PATCH 07/13] Restore description for --debug which was lost.

---
 doc/ca65.sgml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/doc/ca65.sgml b/doc/ca65.sgml
index 31da0306c..04bcbc557 100644
--- a/doc/ca65.sgml
+++ b/doc/ca65.sgml
@@ -196,6 +196,12 @@ Here is a description of all the command line options:
   information to the assembler.
 
 
+  <tag><tt>-d, --debug</tt></tag>
+
+  Enables debug mode, something that should not be needed for mere
+  mortals:-)
+
+
   <label id="option--feature">
   <tag><tt>--feature name</tt></tag>
 

From abb0adf5461d4622ed09a32647ed64e213f33e7d Mon Sep 17 00:00:00 2001
From: Kugel Fuhr <98353208+kugelfuhr@users.noreply.github.com>
Date: Tue, 8 Jul 2025 09:45:25 +0200
Subject: [PATCH 08/13] Update visual studio project files with added sources.

---
 src/ca65.vcxproj   | 4 +++-
 src/common.vcxproj | 2 ++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/ca65.vcxproj b/src/ca65.vcxproj
index d8fd39303..2aa23d60c 100644
--- a/src/ca65.vcxproj
+++ b/src/ca65.vcxproj
@@ -91,6 +91,7 @@
     <ClInclude Include="ca65\easw16.h" />
     <ClInclude Include="ca65\enum.h" />
     <ClInclude Include="ca65\error.h" />
+    <ClInclude Include="ca65\expect.h" />
     <ClInclude Include="ca65\expr.h" />
     <ClInclude Include="ca65\feature.h" />
     <ClInclude Include="ca65\filetab.h" />
@@ -132,6 +133,7 @@
     <ClCompile Include="ca65\easw16.c" />
     <ClCompile Include="ca65\enum.c" />
     <ClCompile Include="ca65\error.c" />
+    <ClCompile Include="ca65\expect.c" />
     <ClCompile Include="ca65\expr.c" />
     <ClCompile Include="ca65\feature.c" />
     <ClCompile Include="ca65\filetab.c" />
@@ -168,4 +170,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/src/common.vcxproj b/src/common.vcxproj
index 251ea3aeb..0c0994642 100644
--- a/src/common.vcxproj
+++ b/src/common.vcxproj
@@ -86,6 +86,7 @@
     <ClInclude Include="common\check.h" />
     <ClInclude Include="common\cmdline.h" />
     <ClInclude Include="common\coll.h" />
+    <ClInclude Include="common\consprop.h" />
     <ClInclude Include="common\cpu.h" />
     <ClInclude Include="common\debugflag.h" />
     <ClInclude Include="common\exprdefs.h" />
@@ -139,6 +140,7 @@
     <ClCompile Include="common\check.c" />
     <ClCompile Include="common\cmdline.c" />
     <ClCompile Include="common\coll.c" />
+    <ClCompile Include="common\consprop.c" />
     <ClCompile Include="common\cpu.c" />
     <ClCompile Include="common\debugflag.c" />
     <ClCompile Include="common\exprdefs.c" />

From 0c14830da0e9336fa044e5a40a6b236ac74cd024 Mon Sep 17 00:00:00 2001
From: Kugel Fuhr <98353208+kugelfuhr@users.noreply.github.com>
Date: Tue, 8 Jul 2025 09:46:53 +0200
Subject: [PATCH 09/13] Remove tabs.

---
 src/common/consprop.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/common/consprop.c b/src/common/consprop.c
index 9dceef1b3..9bf1d2a78 100644
--- a/src/common/consprop.c
+++ b/src/common/consprop.c
@@ -128,8 +128,8 @@ void CP_Init (void)
     if (IsTTY) {
         CodePage = GetConsoleOutputCP ();
         IsUTF8 = (int) SetConsoleOutputCP (CP_UTF8);
-	if (IsUTF8) {
-	    /* Switch the code page back on exit */
+        if (IsUTF8) {
+            /* Switch the code page back on exit */
             atexit (Cleanup);
         }
         if (Color) {

From bb255838a6f47ba83a48a3fb5cffb90ecf26c05d Mon Sep 17 00:00:00 2001
From: Kugel Fuhr <98353208+kugelfuhr@users.noreply.github.com>
Date: Tue, 8 Jul 2025 09:55:43 +0200
Subject: [PATCH 10/13] Fix include files for Windows (hopefully).

---
 src/common/consprop.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/common/consprop.c b/src/common/consprop.c
index 9bf1d2a78..c45bb14a4 100644
--- a/src/common/consprop.c
+++ b/src/common/consprop.c
@@ -31,10 +31,12 @@
 
 
 #include <stdlib.h>
-#include <unistd.h>
-#ifdef _WIN32
-#include <windows.h>
-#define isatty _isatty
+#if !defined(WIN32)
+#  include <unistd.h>
+#else
+#  include <windows.h>
+#  include <io.h>
+#  define isatty _isatty
 #endif
 
 /* common */

From 26968ffdf2b5dc449428a44869afc9bee7d1ccc7 Mon Sep 17 00:00:00 2001
From: Kugel Fuhr <98353208+kugelfuhr@users.noreply.github.com>
Date: Tue, 8 Jul 2025 09:58:48 +0200
Subject: [PATCH 11/13] Fixed a typo :-(

---
 src/common/consprop.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/common/consprop.c b/src/common/consprop.c
index c45bb14a4..5cf89fbb0 100644
--- a/src/common/consprop.c
+++ b/src/common/consprop.c
@@ -31,7 +31,7 @@
 
 
 #include <stdlib.h>
-#if !defined(WIN32)
+#if !defined(_WIN32)
 #  include <unistd.h>
 #else
 #  include <windows.h>

From 72e3956aeba5361979fdf25a1f906e350b887462 Mon Sep 17 00:00:00 2001
From: Kugel Fuhr <98353208+kugelfuhr@users.noreply.github.com>
Date: Tue, 8 Jul 2025 10:02:39 +0200
Subject: [PATCH 12/13] Add missing definitions for Windows.

---
 src/common/consprop.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/common/consprop.c b/src/common/consprop.c
index 5cf89fbb0..f916ef4a7 100644
--- a/src/common/consprop.c
+++ b/src/common/consprop.c
@@ -37,6 +37,8 @@
 #  include <windows.h>
 #  include <io.h>
 #  define isatty _isatty
+#  define STDOUT_FILENO  1
+#  define STDERR_FILENO  2
 #endif
 
 /* common */

From 2926a95e712dd54c7a97e41c4de3b863b05c0698 Mon Sep 17 00:00:00 2001
From: Kugel Fuhr <98353208+kugelfuhr@users.noreply.github.com>
Date: Tue, 8 Jul 2025 10:03:56 +0200
Subject: [PATCH 13/13] Use correct type for function used in atexit().

---
 src/common/consprop.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/common/consprop.c b/src/common/consprop.c
index f916ef4a7..cb1983953 100644
--- a/src/common/consprop.c
+++ b/src/common/consprop.c
@@ -105,7 +105,7 @@ const char CP_BoxDrawingSeq[BD_COUNT][2][4] = {
 
 
 #ifdef _WIN32
-static void Cleanup()
+static void Cleanup (void)
 /* Cleanup on program exit */
 {
     SetConsoleOutputCP (CodePage);