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Subject: [Bug gcov-profile/55734] [4.8 Regression] gcov-io.c uses builtins not available in non-GCC compilers
Date: Wed, 19 Dec 2012 15:08:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55734

--- Comment #16 from Teresa Johnson <tejohnson at google dot com> 2012-12-19 15:07:54 UTC ---
On Wed, Dec 19, 2012 at 5:07 AM, rguenth at gcc dot gnu.org
<gcc-bugzilla@gcc.gnu.org> wrote:
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55734
>
> --- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> 2012-12-19 13:07:01 UTC ---
> (In reply to comment #14)
>> (In reply to comment #10)
>> > Ah yes, now I remember.  Yes, there is a problem with libgcov.a.  I
>> > wasn't seeing it because I was only building cc1.  You are correct
>> > Teresa, that is the reason for the gymnastics in my original patch.
>> >
>> > houston:/build/trunkboot/gcc$ nm libgcov.a |grep popc
>> >                   U popcount_hwi
>> >
>> > I will let you and Richard sort it out :).
>>
>> libgcov should be built by stage1 gcc already and thus has the builtins
>> available.
>
> To be more explicit - use #if IN_LIBGCOV to guard __builtin_popcountll vs.
> popcount_hwi.

Ah, yes, this fact escaped me and makes things much simpler. Running
the regression tests right now, will send patch as soon as they
finish...

Thanks,
Teresa

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Teresa Johnson | Software Engineer | tejohnson@google.com | 408-460-2413