[Patch,fortran] PR 27740 Symbol versioning for libgfortran

[Andrew Pinski]

> 
> FAIL: gfortran.dg/csqrt_2.f  -O0  execution test
> FAIL: gfortran.dg/csqrt_2.f  -O1  execution test
> FAIL: gfortran.dg/csqrt_2.f  -O2  execution test
> FAIL: gfortran.dg/csqrt_2.f  -O3 -fomit-frame-pointer  execution test
> FAIL: gfortran.dg/csqrt_2.f  -O3 -fomit-frame-pointer -funroll-loops 
> execution test
> FAIL: gfortran.dg/csqrt_2.f  -O3 -fomit-frame-pointer -funroll-all-loops 
> -finline-functions  execution test
> FAIL: gfortran.dg/csqrt_2.f  -O3 -g  execution test
> FAIL: gfortran.dg/csqrt_2.f  -Os  execution test
> 
> (This is on Debian stable, with an unmodified trunk except for applying 
> Richard Guenther's recent patch for fixincludes so it will bootstrap.)

This is a different problem in fact this was a bug in glibc and it was XFAIL'd
on Linux until just recently when we (maybe not we, the gfortran developers) decided
that glibc 2.4.0 has been out long enough to no longer xfail this testcase.

-- Pinski