remove oserror from rp6502

libsrc/rp6502/errno.s

@@ -0,0 +1,28 @@
+;
+; 2003-08-12, Ullrich von Bassewitz
+; 2015-09-24, Greg King
+;
+; extern int __errno;
+; /* Library errors go here. */
+;
+
+        .include        "rp6502.inc"
+        .include        "errno.inc"
+        .export         ___errno, _errno_opt
+        .import         _ria_call_int
+        .constructor    _errno_opt_constructor
+
+; The errno on the RIA is the errno for cc65
+___errno        := RIA_ERRNO
+
+.code
+
+; Request the RIA use cc65 values for RIA_ERRNO
+_errno_opt_constructor:
+        lda #$01 ; 1 = cc65
+
+; int __fastcall__ errno_opt (unsigned char platform);
+_errno_opt:
+        sta RIA_A
+        lda #RIA_OP_ERRNO_OPT
+        jmp _ria_call_int