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[PATCH] use -fno-pie on darwin in boehm-gc.exp


Currently the boehm-gc testsuite fails...

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

on x86_64-apple-darwin11 due to the -pie linker default. The attached patch
uses -fno-pie on darwin to insure that -no_pie is passed to the linker when
targeting darwin11 or later. This approach is used because istarget doesn't
support complex regex to allow -Wl,-no_pie to be passed for darwin11 and later
only (since only recent Xcode releases understand the -no_pie linker option).
Also, -fno_pie has the advantage of supporting -mmacosx-version-min usage.
Regression tested on x86_64-apple-darwin11...

http://gcc.gnu.org/ml/gcc-testresults/2011-12/msg00856.html

Okay for gcc trunk?
                 Jack


boehm-gc/

2011-12-08  Jack Howarth <howarth@bromo.med.uc.edu>

        * testsuite/lib/boehm-gc.exp: Use -fno-pie on darwin.

Index: boehm-gc/testsuite/lib/boehm-gc.exp
===================================================================
--- boehm-gc/testsuite/lib/boehm-gc.exp	(revision 182117)
+++ boehm-gc/testsuite/lib/boehm-gc.exp	(working copy)
@@ -214,6 +214,11 @@ proc boehm-gc_target_compile { source de
     lappend options "additional_flags=-I${gc_include} -I${srcdir}/../include"
     lappend options "additional_flags=${threadcflags}"
 
+    # Disable -pie linker default for darwin11 and later using -fno-pie.
+    if { [istarget *-*-darwin*] } {
+	lappend options "additional_flags=-fno-pie"
+    }
+
     lappend options "libs=-Wc,-shared-libgcc"
     
     if { [file extension $dest] == ".la" } {


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