Hi,
On Tue, 2020-09-15 at 20:40 +0200, Jakub Jelinek wrote:
> Ok, here it is in patch form.
> I've briefly tested it, with the older binutils I have around (no --gdwarf-N
> support), with latest gas (--gdwarf-N that can be passed to as even when
> compiling C/C++ etc. code and emitting .debug_line) and latest gas with
> Mark's fix
> reverted (--gdwarf-N support, but can only pass it to as when assembling
> user .s/.S files, not when compiling C/C++ etc.).
> Will bootstrap/regtest (with the older binutils) later tonight.
>
> 2020-09-15 Jakub Jelinek <ja...@redhat.com>
>
> * configure.ac (HAVE_AS_GDWARF_5_DEBUG_FLAG,
> HAVE_AS_WORKING_DWARF_4_FLAG): New tests.
> * gcc.c (ASM_DEBUG_DWARF_OPTION): Define.
> (ASM_DEBUG_SPEC): Use ASM_DEBUG_DWARF_OPTION instead of
> "--gdwarf2". Use %{cond:opt1;:opt2} style.
> (ASM_DEBUG_OPTION_DWARF_OPT): Define.
> (ASM_DEBUG_OPTION_SPEC): Define.
> (asm_debug_option): New variable.
> (asm_options): Add "%(asm_debug_option)".
> (static_specs): Add asm_debug_option entry.
> (static_spec_functions): Add dwarf-version-gt.
> (debug_level_greater_than_spec_func): New function.
> * config/darwin.h (ASM_DEBUG_OPTION_SPEC): Define.
> * config/darwin9.h (ASM_DEBUG_OPTION_SPEC): Redefine.
> * config.in: Regenerated.
> * configure: Regenerated.
I tested against the binutils-2_35-branch which will become 2.35.1 next
week. The configure tests succeed there. So I think you can change the
[elf,2,36,0] to [elf,2,35,1].
Also tested that they fail with an older binutils (2.32).
Cheers,
Mark
