Hello, By my count, there are a lot of undocumented target macro defines that are darwin specific. In total there are 59 undocumented cases, and 16 of them are darwin specific. (To get to this count, I've simply looked at all #defines in config/* + config/*/*, looked up the ones that are used in the gcc/ directory, and that are not documented in doc/*.texi -- see full list at the bottom of this e-mail).
The darwin specific cases are the following: COLLECT_RUN_DSYMUTIL DEBUG_ABBREV_SECTION DEBUG_ARANGES_SECTION DEBUG_FRAME_SECTION DEBUG_INFO_SECTION DEBUG_LINE_SECTION DEBUG_LOC_SECTION DEBUG_MACINFO_SECTION DEBUG_MACRO_SECTION DEBUG_PUBNAMES_SECTION DEBUG_PUBTYPES_SECTION DEBUG_RANGES_SECTION DEBUG_STR_SECTION DSYMUTIL FRAME_BEGIN_LABEL ASM_DEBUG_SPEC Most of them deal with debugging things that Mach-O does not support in the "normal" way that ELF does, e.g. all the DEBUG_*_SECTION defines, like so: dwarf2out.c:#define DEBUG_FRAME_SECTION ".debug_frame" config/darwin.h:#define DEBUG_FRAME_SECTION "__DWARF,__debug_frame,regular,debug" dwarf2out.c:#define DEBUG_INFO_SECTION ".debug_info" config/darwin.h:#define DEBUG_INFO_SECTION "__DWARF,__debug_info,regular,debug" dwarf2out.c:#define DEBUG_ABBREV_SECTION ".debug_abbrev" config/darwin.h:#define DEBUG_ABBREV_SECTION "__DWARF,__debug_abbrev,regular,debug" dwarf2out.c:#define DEBUG_ARANGES_SECTION ".debug_aranges" config/darwin.h:#define DEBUG_ARANGES_SECTION "__DWARF,__debug_aranges,regular,debug" dwarf2out.c:#define DEBUG_MACINFO_SECTION ".debug_macinfo" config/darwin.h:#define DEBUG_MACINFO_SECTION "__DWARF,__debug_macinfo,regular,debug" dwarf2out.c:#define DEBUG_LINE_SECTION ".debug_line" config/darwin.h:#define DEBUG_LINE_SECTION "__DWARF,__debug_line,regular,debug" dwarf2out.c:#define DEBUG_LOC_SECTION ".debug_loc" config/darwin.h:#define DEBUG_LOC_SECTION "__DWARF,__debug_loc,regular,debug" dwarf2out.c:#define DEBUG_PUBNAMES_SECTION ".debug_pubnames" config/darwin.h:#define DEBUG_PUBNAMES_SECTION "__DWARF,__debug_pubnames,regular,debug" dwarf2out.c:#define DEBUG_PUBTYPES_SECTION ".debug_pubtypes" config/darwin.h:#define DEBUG_PUBTYPES_SECTION "__DWARF,__debug_pubtypes,regular,debug" dwarf2out.c:#define DEBUG_STR_SECTION ".debug_str" config/darwin.h:#define DEBUG_STR_SECTION "__DWARF,__debug_str,regular,debug" dwarf2out.c:#define DEBUG_RANGES_SECTION ".debug_ranges" config/darwin.h:#define DEBUG_RANGES_SECTION "__DWARF,__debug_ranges,regular,debug" I am not sure how to proceed with these target macros. I could documenting these target macros, but where are the default names taken from (a spec somewhere), and is this the Right solution given that only darwin uses non-default names? In fact darwin does follow the naming convention, the only difference is that it wraps the section name in a segment label (always "__DWARF__") and adds some flags (always "regular,debug"). I would have expected there to be a way to change a section name in a target-specific way (something like a targetm.asm_out.adjust_section_name to transform ".debug_blah" to "__DWARF,__debug_blah,regular,debug") but it seems such a mechanism doesn't exist. Maybe add a hook for this? Thoughts/comments/suggestions welcome... Ciao! Steven Complete list: missing: ADDR_VEC_ALIGN missing: ADJUST_INSN_LENGTH missing: ASCII_DATA_ASM_OP missing: ASM_OUTPUT_ADDR_DIFF_VEC missing: ASM_OUTPUT_ADDR_VEC missing: ASM_OUTPUT_EXTERNAL_LIBCALL missing: ASM_OUTPUT_LIMITED_STRING missing: ASM_PN_FORMAT missing: COLLECT_RUN_DSYMUTIL missing: CPU_UNITS_QUERY missing: DEBUG_ABBREV_SECTION missing: DEBUG_ARANGES_SECTION missing: DEBUG_FRAME_SECTION missing: DEBUG_INFO_SECTION missing: DEBUG_LINE_SECTION missing: DEBUG_LOC_SECTION missing: DEBUG_MACINFO_SECTION missing: DEBUG_MACRO_SECTION missing: DEBUG_PUBNAMES_SECTION missing: DEBUG_PUBTYPES_SECTION missing: DEBUG_RANGES_SECTION missing: DEBUG_STR_SECTION missing: DSYMUTIL missing: DWARF2_ADDR_SIZE missing: ELF_ASCII_ESCAPES missing: ELF_STRING_LIMIT missing: FENCE_FOLLOWING_MOVNT missing: FP_REG_P missing: FRAME_BEGIN_LABEL missing: HAVE_AS_LEB128 missing: HAVE_AS_TLS missing: INSN_LENGTH_ALIGNMENT missing: IS_STACK_MODE missing: JCR_SECTION_NAME missing: JMP_BUF_SIZE missing: LOGICAL_OP_NON_SHORT_CIRCUIT missing: MY_ISCOFF missing: NAME__MAIN missing: NORMAL_MODE missing: PIC_CASE_VECTOR_ADDRESS missing: READ_CAN_USE_WRITE_PREFETCH missing: SPARC_STACK_BOUNDARY_HACK missing: STACK_POP_CODE missing: STACK_REG_P missing: STRING_ASM_OP missing: SYMBOL__MAIN missing: TARGET_64BIT missing: TARGET_64BIT_DEFAULT missing: TARGET_AIX_VERSION missing: TARGET_SCHED_FIRST_CYCLE_MULTIPASS_DATA_T missing: VMS_DEBUG_MAIN_POINTER missing: ASM_DEBUG_SPEC missing: EXTRA_SPEC_FUNCTIONS missing: GOMP_SELF_SPECS missing: GTM_SELF_SPECS missing: LINK_SSP_SPEC missing: MFLIB_SPEC missing: MFWRAP_SPEC missing: STARTFILE_PREFIX_SPEC
