The following patch to GCC sources (contributed by Robert Hoehne) will
enable stabs debugging support in GCC 2.7.2.1. (Submitted on behalf of
Nate Eldridge by Eli Zaretskii.)
*** config/i386/go32.h~ Fri May 12 13:24:30 1995
--- config/i386/go32.h Mon Feb 3 20:08:04 1997
***************
*** 1,5 ****
--- 1,13 ----
/* Configuration for an i386 running MS-DOS with djgpp/go32. */
+ #define DBX_DEBUGGING_INFO /* support for stabs debugging info */
+ #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG /* leave sdb as default */
+ #define NO_STAB_H /* DJGPP has no stab.h */
+ #if 1 /* enable this, if '-g' should select stabs debugging */ /* I did -NE */
+ #undef PREFERRED_DEBUGGING_TYPE
+ #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
+ #endif
+
/* Don't assume anything about the header files. */
#define NO_IMPLICIT_EXTERN_C
***************
*** 61,64 ****
--- 69,116 ----
fprintf (FILE, "\n"); \
} while (0)
+ /* Output at beginning of assembler file. */
+ /* The .file command should always begin the output. */
+ /* Use the main_input_filename instead of dump_base_name */
+
+ #undef ASM_FILE_START
+ #define ASM_FILE_START(FILE) \
+ do { \
+ output_file_directive (FILE, main_input_filename); \
+ } while (0)
+
+ /* Be function-relative for block and source line stab directives. */
+
+ #define DBX_BLOCKS_FUNCTION_RELATIVE 1
+ /* but, to make this work, functions must appear prior to line info */
+
+ #define DBX_FUNCTION_FIRST
+
+ /* Generate a blank trailing N_SO to mark the end of the .o file, since
+ we can't depend upon the linker to mark .o file boundaries with
+ embedded stabs. */
+
+ #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME) \
+ fprintf (FILE, \
+ " .text
.stabs \"\",%d,0,0,Letext
Letext:\n", N_SO)
+
+ #undef ASM_OUTPUT_SOURCE_LINE
+ #define ASM_OUTPUT_SOURCE_LINE(file, line) \
+ if ( write_symbols == DBX_DEBUG ) \
+ { static int sym_lineno = 1; \
+ fprintf (file, ".stabn 68,0,%d,.LM%d-", \
+ line, sym_lineno); \
+ assemble_name (file, \
+ XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \
+ fprintf (file, "
.LM%d:\n", sym_lineno); \
+ sym_lineno += 1; } \
+ else { \
+ fprintf (file, " .ln %d\n", \
+ ((sdb_begin_function_line > -1) \
+ ? line - sdb_begin_function_line : 1)); }
+
+ #define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME)\
+ do { \
+ fprintf (FILE, " .section %s\n", NAME); \
+ } while (0)