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

[patrick.marlier at gmail dot com]

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

--- Comment #16 from Patrick Marlier <patrick.marlier at gmail dot com> 2012-02-23 15:49:26 UTC ---
Created attachment 26735
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26735
proposal fix

I have also started a patch (not tested at all) but I am more extreme in the
approach and confines the change to boehm-gc and darwin x86/x86_64 (Lion
doesn't support PPC, right?). Does the change to x86 is required? I am not
sure...
This is a workaround for 4.7 but I think boehm-gc should be updated for 4.8?
Jack/Iain/Mike, I think it is wise to let you fix it since I have no access to
a darwin11.

        PR boehm-gc/52179
        * include/private/gcconfig.h (DARWIN): Define STACKBOTTOM with
        pthread_get_stackaddr_np when available.
        * configure.ac (THREADS): Check availability of
        pthread_get_stackaddr_np on *-*-darwin*.
        * configure: Regenerate.