[Bug target/63610] OSX 10.10 (Yosemite) segfault in MPIR testsuite with -O0 or -O1

[howarth at bromo dot med.uc.edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63610

--- Comment #7 from howarth at bromo dot med.uc.edu ---
I can confirm that there are many regressions (particularly in the fortran test
suite) on Yosemite due to the libtool bug which causes shared libraries to be
linked as if the target was Puma. The attached convenience patch solves the
issue (which should only be triggered if MACOSX_DEPLOYMENT_TARGET is being
set). The fix is of the form...

Index: gcc-4.9.1/gcc/configure
===================================================================
--- gcc-4.9.1.orig/gcc/configure
+++ gcc-4.9.1/gcc/configure
@@ -14415,7 +14415,7 @@ $as_echo "$lt_cv_ld_force_load" >&6; }
       case ${MACOSX_DEPLOYMENT_TARGET-10.0},$host in
        10.0,*86*-darwin8*|10.0,*-darwin[91]*)
          _lt_dar_allow_undefined='${wl}-undefined ${wl}dynamic_lookup' ;;
-       10.[012]*)
+       10.[012][,.]*)
          _lt_dar_allow_undefined='${wl}-flat_namespace ${wl}-undefined
${wl}suppress' ;;
        10.*)
          _lt_dar_allow_undefined='${wl}-undefined ${wl}dynamic_lookup' ;;