[testsuite] PATCH: Ignore additional messages on Linux/x86 with PIE

[Mike Stump]

So, I was hoping that someone would step forward and review this.  I’d like for a reviewer to consider, is this the type of error messages we want to vend to the poor user?  It strikes me as, well, icky.  Should -fPIE imply -fPIC?

Exclusive of that issue, the patch is fine.

On Jan 11, 2015, at 4:23 PM, H.J. Lu <hjl.tools@gmail.com> wrote:
> g++.dg/other/anon5.C is expected to fail to link.  On Linux/x86 with PIE,
> there are additional messages linker:
> 
> [hjl@gnu-tools-1 gcc]$ g++  -fPIE -pie
> /export/gnu/import/git/sources/gcc/gcc/testsuite/g++.dg/other/anon5.C
> /tmp/ccwg53fj.o: In function `f()': anon5.C:(.text+0x7): undefined reference to `(anonymous namespace)::c::t'
> /usr/local/bin/ld: /tmp/ccwg53fj.o: relocation R_X86_64_PC32 against undefined symbol `_ZN12_GLOBAL__N_11c1tE' can not be used when making a shared object; recompile with -fPIC
> /usr/local/bin/ld: final link failed: Bad value
> collect2: error: ld returned 1 exit status
> [hjl@gnu-tools-1 gcc]$ 
> 
> This patch ignores additional messages on Linux/x86 with PIE.  OK for
> trunk?
> 
> Thanks.
> 
> H.J.
> ---
> gcc/testsuite/g++.dg/other/anon5.C | 2 ++
> 1 file changed, 2 insertions(+)
> 
> 2015-01-11  H.J. Lu  <hongjiu.lu@intel.com>
> 
> 	* g++.dg/other/anon5.C: Ignore additional messages on Linux/x86
> 	with PIE.
> 
> diff --git a/gcc/testsuite/g++.dg/other/anon5.C b/gcc/testsuite/g++.dg/other/anon5.C
> index 81e9def..4e4cc44 100644
> --- a/gcc/testsuite/g++.dg/other/anon5.C
> +++ b/gcc/testsuite/g++.dg/other/anon5.C
> @@ -3,6 +3,8 @@
> // { dg-options "-g" }
> // Ignore additional message on powerpc-ibm-aix
> // { dg-prune-output "obtain more information" } */
> +// Ignore additional messages on Linux/x86 with PIE
> +// { dg-prune-output "Bad value" } */
> 
> namespace {
>   struct c