dw2_asm_output_nstring() essentially inlines the version of OUTPUT_ASCII for the GNU Assembler ELF file format for the debug_asm case to append the comment and calls OUTPUT_ASCII when not debugging. The DWARF portion of the GCC testsuite relies on the text that appears in the comments, so it needs to work somewhat on AIX.
The function previously had been adjusted to emit the AIX assembler .byte directive. The AIX assembler escapes double quotes with another double quote, not a backslash. The AIX toolchain added support for the debug_macinfo section and macros with quotes generate assembler errors when debug_asm is enabled. This patch adjusts the function to emit a double quote instead of a backslash when XCOFF_DEBUGGING_INFO is defined for AIX. Bootstrapped on powerpc-ibm-aix7.2.0.0 Okay? Thanks, David Index: dwarf2asm.c =================================================================== --- dwarf2asm.c (revision 250453) +++ dwarf2asm.c (working copy) @@ -345,7 +345,9 @@ dw2_asm_output_nstring (const char *str, size_t or for (i = 0; i < len; i++) { int c = str[i]; - if (c == '\"' || c == '\\') + if (c == '\"') + fputc (XCOFF_DEBUGGING_INFO ? '\"' : '\\', asm_out_file); + else if (c == '\\') fputc ('\\', asm_out_file); if (ISPRINT (c)) fputc (c, asm_out_file);