Add --warn-align-waste option to ca65, ld65, cl65

src/ld65/global.c

@@ -55,6 +55,7 @@ unsigned long StartAddr         = 0x200;    /* Start address */
 unsigned char VerboseMap        = 0;        /* Verbose map file */
 unsigned char AllowMultDef      = 0;        /* Allow multiple definitions */
 unsigned char LargeAlignment    = 0;        /* Don't warn about large alignments */
+unsigned char WarnAlignWaste    = 0;        /* Warn about "wasted" bytes when aligning */
 unsigned char WarningsAsErrors  = 0;        /* Error if any warnings */
 
 const char* MapFileName         = 0;        /* Name of the map file */

src/ld65/global.h

@@ -55,6 +55,7 @@ extern unsigned long    StartAddr;         /* Start address */
 extern unsigned char    VerboseMap;        /* Verbose map file */
 extern unsigned char    AllowMultDef;      /* Allow multiple definitions */
 extern unsigned char    LargeAlignment;    /* Don't warn about large alignments */
+extern unsigned char    WarnAlignWaste;    /* Warn about "wasted" bytes when aligning */
 extern unsigned char    WarningsAsErrors;  /* Error if any warnings */
 
 extern const char*      MapFileName;       /* Name of the map file */

src/ld65/main.c

@@ -179,7 +179,9 @@ static void Usage (void)
             "  --start-addr addr\t\tSet the default start address\n"
             "  --start-group\t\t\tStart a library group\n"
             "  --target sys\t\t\tSet the target system\n"
-            "  --version\t\t\tPrint the linker version\n",
+            "  --version\t\t\tPrint the linker version\n"
+            "  --warn-align-waste\t\tPrint bytes \"wasted\" for alignment\n"
+            "  --warnings-as-errors\t\tTreat warnings as errors\n",
             ProgName);
 }
 
@@ -608,6 +610,15 @@ static void OptVersion (const char* Opt attribute ((unused)),
 
 
 
+static void OptWarnAlignWaste (const char* Opt attribute ((unused)),
+                               const char* Arg attribute ((unused)))
+/* Warn about bytes "wasted" for alignment */
+{
+    WarnAlignWaste = 1;
+}
+
+
+
 static void OptWarningsAsErrors (const char* Opt attribute ((unused)),
                                  const char* Arg attribute ((unused)))
 /* Generate an error if any warnings occur */
@@ -691,6 +702,7 @@ static void ParseCommandLine (void)
         { "--start-group",               0,      CmdlOptStartGroup       },
         { "--target",                    1,      CmdlOptTarget           },
         { "--version",                   0,      OptVersion              },
+        { "--warn-align-waste",          0,      OptWarnAlignWaste       },
         { "--warnings-as-errors",        0,      OptWarningsAsErrors     },
     };
 

src/ld65/segments.c

@@ -236,8 +236,9 @@ Section* ReadSection (FILE* F, ObjData* O)
                      GetString (Name), Alignment, GetObjFileName (O));
         }
         S->Alignment = Alignment;
-        if (Sec->Fill != 0) {
-            Warning("Wasting %lu bytes for alignment from %s", Sec->Fill, GetObjFileName (O));
+        if (WarnAlignWaste && Sec->Fill != 0) {
+            Warning("%s: Wasting %lu bytes for `%s' alignment",
+                    GetObjFileName (O), Sec->Fill, GetString (Name));
         }
     }