[Bug boehm-gc/52179] New: boehm-gc incompatible with aslr on darwin11

["howarth at nitro dot med.uc.edu" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52179

             Bug #: 52179
           Summary: boehm-gc incompatible with aslr on darwin11
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: boehm-gc
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: howarth@nitro.med.uc.edu


Currently we see the failures...

FAIL: boehm-gc.c/gctest.c -O2 execution test
FAIL: boehm-gc.c/leak_test.c -O2 execution test
FAIL: boehm-gc.c/thread_leak_test.c -O2 execution test
FAIL: boehm-gc.lib/staticrootstest.c -O2 execution test

at -m32/-m64 on x86_64-apple-darwin11. Interestingly, if
boehm-gc/testsuite/lib/boehm-gc.exp is adjusted pass -Wl,-pie to these tests,
the failures are not seen under aslr on x86_64-apple-darwin10. This is the same
behavior seen for PR52042 which suggests that the issue and fix may be similar.
Perhaps the same approach used in could be applied to boehm-gc/dyn_load.c.