X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=aclocal.m4;h=a5132f027aa42fb0ddb122bc9672662bd592ec9e;hb=5ee7f0e66649ef31c2fcb2528399b57eba5651db;hp=747d064f2ad9c0be5b97593b3d56448940c2a384;hpb=593790400ecb8e6dbbef1ade3da56b1070ba155e;p=ghc-hetmet.git

diff --git a/aclocal.m4 b/aclocal.m4
index 747d064..a5132f0 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -11,14 +11,27 @@ AC_DEFUN([FPTOOLS_SET_C_LD_FLAGS],
 [
     case $$1 in
     i386-apple-darwin|powerpc-apple-darwin)
-        $2="$$2 -m32"
-        $3="$$3 -m32"
+        # By default, gcc on OS X will generate SSE
+        # instructions, which need things 16-byte aligned,
+        # but we don't 16-byte align things. Thus drop
+        # back to generic i686 compatibility. Trac #2983.
+        $2="$$2 -march=i686 -m32"
+        $3="$$3 -march=i686 -m32"
         ;;
     x86_64-apple-darwin)
         $2="$$2 -m64"
         $3="$$3 -m64"
         ;;
     esac
+
+    # If gcc knows about the stack protector, turn it off.
+    # Otherwise the stack-smash handler gets triggered.
+    echo 'int main(void) {return 0;}' > conftest.c
+    if $CC -c conftest.c -fno-stack-protector > /dev/null 2>&1
+    then
+        $2="$$2 -fno-stack-protector"
+    fi
+    rm conftest.c conftest.o
 ])
 
 
@@ -962,9 +975,6 @@ AC_SUBST([GhcPkgCmd])
 # reordering things in the module and confusing the manger and/or splitter.
 # (eg. Trac #1427)
 #
-# If gcc knows about the stack protector, turn it off.
-# Otherwise the stack-smash handler gets triggered.
-#
 AC_DEFUN([FP_GCC_EXTRA_FLAGS],
 [AC_REQUIRE([FP_HAVE_GCC])
 AC_CACHE_CHECK([for extra options to pass gcc when compiling via C], [fp_cv_gcc_extra_opts],
@@ -990,12 +1000,6 @@ AC_CACHE_CHECK([for extra options to pass gcc when compiling via C], [fp_cv_gcc_
       [])
   ;;
  esac
- echo 'int main(void) {return 0;}' > conftest.c
- if $CC -c conftest.c -fno-stack-protector > /dev/null 2>&1
- then
-     fp_cv_gcc_extra_opts="$fp_cv_gcc_extra_opts -fno-stack-protector"
- fi
- rm conftest.c conftest.o
 ])
 AC_SUBST([GccExtraViaCOpts],$fp_cv_gcc_extra_opts)
 ])