[PATCH, testsuite]: Use -gdwarf-2 for g++.dg/other/anon5.C

[Uros Bizjak]

Hello!

This test case fails for targets, where dwarf-4 is unsupported (e.g.
CentOS 5.11) with

/usr/bin/ld: Dwarf Error: found dwarf version '4', this reader only
handles version 2 information.

We can use -gdwarf-2 here, and still get correct linker error message
on Cent OS 5.11 and Fedora 23.

2016-02-01  Uros Bizjak  <ubizjak@gmail.com>

    * g++.dg/other/anon5.C (dg-opetions): Use -gdwarf-2 instead of -g.

Tested on x86_64-linux-gnu, CentOS 5.11 and Fedora 23.

OK for mainline?

Uros.
-------------- next part --------------
Index: g++.dg/other/anon5.C
===================================================================
--- g++.dg/other/anon5.C	(revision 233041)
+++ g++.dg/other/anon5.C	(working copy)
@@ -1,6 +1,6 @@
 // PR c++/34094
 // { dg-do link { target { ! { *-*-darwin* *-*-hpux* *-*-solaris2.* } } } }
-// { dg-options "-g" }
+// { dg-options "-gdwarf-2" }
 // Ignore additional message on powerpc-ibm-aix
 // { dg-prune-output "obtain more information" } */
 // Ignore additional messages on Linux/x86 with PIE