https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85994
--- Comment #6 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot
Uni-Bielefeld.DE> ---
> --- Comment #4 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot
> Uni-Bielefeld.DE> ---
>> --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
>> (In reply to Rainer Orth from comment #0)
>>> I see several possible fixes:
>>>
>>> * Just compile those files with -g0: there's probably no point in gas adding
>>> debug info anyway.
>>>
>>> * Restrict the cpp -P workaround to non-gas.
>>>
>>> * Autoconf assembler # <line> support and only pass -P to cpp if really
>>> needed.
>>>
>>> Suggestions?
>>
>> The last two work for me.
>
> Unless there are other comments, I'll go for the third option.
I tried that, to no avail:
* The original Solaris 10/x86 as (version s10_73) cannot even assemble
mov %r15,-0x70(%rax)
It seems it doesn't recognize any amd64 register names.
* The first as to support line markers (from patch 119961-03) breaks in
the 64-bit libgcc:
Assembler: unwind-c.c
"/var/tmp//ccFLB9of.s", line 127 : Illegal subtraction - symbols from
different sections: ".L23", ".L25"
make[5]: *** [/vol/gcc/src/hg/trunk/local/libgcc/shared-object.mk:14:
unwind-c.o] Error 1
Unlike the current Solaris 10/x86 as, HAVE_AS_IX86_DIFF_SECT_DELTA
isn't defined in gcc/auto-host.h.
Given that neither assembler is usable to bootstrap current gcc, with or
without passing -P to cpp and nobody cared, I've chosen just to always
omit -P to fix the comparison failure.
Will install patch shortly.
