[Bug testsuite/23867] New: libstdc++ ABI testsuite should work for installed compiler testing

["jsm28 at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>]

The libstdc++ ABI testsuite does not work when testing an installed compiler
because:

* abi.exp checks for "../src/.libs/libstdc++.so", which of course is not
available with an installed compiler.

* abi.exp requires baseline_file to be set in site.exp; with installed compiler
testing, site.exp is generally created to set generic variables such as CC and
CXX being the compilers to test, but not libstdc++-specific ones such as
baseline_file.

The testsuite should be arranged so that it can find the libstdc++ being used by
an installed toolchain, and the logic to find the baseline file should be
implemented within the testsuite.  It would probably then no longer be necessary
to restrict the ABI testing to native compilers only.

Mark has asked for this PR to be assigned to him.

-- 
           Summary: libstdc++ ABI testsuite should work for installed
                    compiler testing
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: testsuite
        AssignedTo: mark at codesourcery dot com
        ReportedBy: jsm28 at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23867