[gold patch] PR 14344: Disable --gdb-index tests for older GCC

[Cary Coutant <ccoutant at google dot com>]

PR 14344 complains about gdb_index_test_[12] failing with an older
GCC. These tests are really meant to work only with a recent GCC where
we've fixed the pubnames generation to be compatible with what GDB
expects, so I've added a configure check to test for the -gpubnames
option. If that option isn't supported, the tests will be skipped.
I've also added a test so that we test gdb index generation with both
-gno-pubnames and -gpubnames, I've moved common checks from several
scripts into one common script, and I've fixed the checks to work with
a recent patch to readelf.

Tested on x86_64, with both old and new GCC compilers. OK to commit?

-cary



2012-07-17  Cary Coutant  <ccoutant@google.com>

	PR gold/14344
	* configure: Regenerate.
	* configure.ac: Add check for -gpubnames support.
	* testsuite/Makefile.am (gdb_index_test_1): Add check for -gpubnames
	support; force -gno-pubnames.
	(gdb_index_test_2, gdb_index_test_3): Add check for -gpubnames
	support.
	(gdb_index_test_4): New test.
	* testsuite/Makefile.in: Regenerate.
	* testsuite/gdb_index_test_1.sh: Refactor code into common file.
	* testsuite/gdb_index_test_2.sh: Likewise.
	* testsuite/gdb_index_test_3.sh: Don't look for space after colon.
	* testsuite/gdb_index_test_4.sh: New script.
	* testsuite/gdb_index_test_comm.sh: New script with common code;
	don't look for space after colon.

Attachment: gold-config-check-pubnames-patch.txt
Description: Text document