[PATCH v3 1/9] Add configure check to test if gcc supports attribute ifunc.

[Stefan Liebler]

On 08/29/2016 11:34 AM, Florian Weimer wrote:
> On 08/24/2016 04:04 PM, Stefan Liebler wrote:
>> +For multi-arch support it is recommended to use a GCC with
>> gnu-indirect-function
>> +support as it is used to generate ifunc'ed symbols with correct
>> +debug-information. This support can either be enabled by configuring
>> GCC with
>> +@samp{--enable-gnu-indirect-function} or by enabling it by default by
>> setting
>> +@samp{default_gnu_indirect_function} variable for a particular
>> architecture in
>> +gcc source file @file{gcc/config.gcc}.
>
> Maybe use this text instead?
> 6808c16e2d067c8137fa9eae6078dc55c5d355c6
> For multi-arch support it is recommended to use a GCC which has been
> built with support for GNU indirect functions.  This ensures that
> correct debugging information is generated for functions selected by
> IFUNC resolvers.  This support can either be enabled by configuring GCC
> with @samp{--enable-gnu-indirect-function}, or by enabling it by default
> by setting @samp{default_gnu_indirect_function} variable for a
> particular architecture in the GCC source file @file{gcc/config.gcc}.
>
Okay. I've updated install-files and I'll use this updated text also for 
the NEWS entry.
>
> The configure check looks okay to me.  Some existing checks use
> AC_TRY_COMPILE, others use the manual expansion you provided.
>
> Thanks,
> Florian
>

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