[PATCH] S/390: STT_GNU_IFUNC support

[Andreas Krebbel]

On 07/02/2012 04:21 PM, Andreas Jaeger wrote:
> On Monday, July 02, 2012 15:52:49 Andreas Krebbel wrote:
>> On Mon, Jul 02, 2012 at 03:20:30PM +0200, Andreas Jaeger wrote:
>>> So, do you want to add a configure test and only enable the IFUNC
>>> support with new binutils? Or how do you want to handle the
>>> requirement?
>> I'll add a configure check when it is clear which Binutils version
>> will include the support.
> 
> I suggest to check for the feature, not for the version, the configure 
> file already has support for this, so this might be enough:
> AC_CACHE_CHECK([for assembler gnu_indirect_function symbol type 
> support],
>                libc_cv_asm_gnu_indirect_function, [dnl
> cat > conftest.s <<EOF
> .type foo,%gnu_indirect_function
> EOF
> if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 
> 2>&AS_MESSAGE_LOG_FD;
> then
>   libc_cv_asm_gnu_indirect_function=yes
> else
>   libc_cv_asm_gnu_indirect_function=no
> fi
> rm -f conftest*])

This only checks whether the assembler supports gnu_indirect_function as symbol type not
whether the linker actually handles IFUNC symbols for the target.

-Andreas-