backport: re PR boehm-gc/52179 (boehm-gc incompatible with aslr on darwin11)

backport: re PR boehm-gc/52179 (boehm-gc incompatible with aslr on darwin11)

2012-03-02  Jack Howarth  <howarth@bromo.med.uc.edu>

	Backport from mainline
	2012-02-23  Patrick Marlier  <patrick.marlier@gmail.com>
		    Jack Howarth  <howarth@bromo.med.uc.edu>

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

2012-03-02  Jack Howarth  <howarth@bromo.med.uc.edu>

	Backport from mainline
	2012-02-23  Patrick Marlier  <patrick.marlier@gmail.com>
       	    Jack Howarth  <howarth@bromo.med.uc.edu>

	PR target/49461
	* configure.ac (SYSTEMSPEC): No longer pass -no_pie for darwin11.
	* configure: Regenerate.

From-SVN: r184809