From 8c16ca8123c1c3368ef806cb83b62462a1169c68 Mon Sep 17 00:00:00 2001
From: Keegan McAllister <mcallister.keegan@gmail.com>
Date: Mon, 9 Apr 2012 00:09:23 -0400
Subject: [PATCH] Try $LD -Wl,-pie if $LD -pie fails

clang on OS X wants the former.

c.f. http://bugs.ruby-lang.org/issues/5697
---
 configure.ac | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 99b7960..2351d87 100644
--- a/configure.ac
+++ b/configure.ac
@@ -93,7 +93,10 @@ AS_IF([test x"$hardening" != x"no"], [
   check_cc_cxx_flag([-fPIE],
    [check_link_flag([-pie],
      [HARDEN_CFLAGS="$HARDEN_CFLAGS -fPIE"
-      HARDEN_LDFLAGS="$HARDEN_LDFLAGS -pie"])])
+      HARDEN_LDFLAGS="$HARDEN_LDFLAGS -pie"],
+     [check_link_flag([-Wl,-pie],
+       [HARDEN_CFLAGS="$HARDEN_CFLAGS -fPIE"
+        HARDEN_LDFLAGS="$HARDEN_LDFLAGS -Wl,-pie"])])])
 
   check_link_flag([-Wl,-z,relro],
    [HARDEN_LDFLAGS="$HARDEN_LDFLAGS -Wl,-z,relro"