From 93325d3ef0dfb42dadebb978686a0c27a160cdf6 Mon Sep 17 00:00:00 2001
From: Keegan McAllister <mcallister.keegan@gmail.com>
Date: Mon, 9 Apr 2012 00:22:59 -0400
Subject: [PATCH] Include -fPIE when we check for $LD -pie

configure's linker flag check also compiles a C++ program.  g++ -pie informs
both the compiler and linker, but clang++ -Wl,-pie is only a linker flag, and
the linker will complain that the code hasn't been compiled as
position-independent.
---
 configure.ac | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 2351d87..68f4522 100644
--- a/configure.ac
+++ b/configure.ac
@@ -91,10 +91,10 @@ AS_IF([test x"$hardening" != x"no"], [
       [], [-fstack-protector-all])])
 
   check_cc_cxx_flag([-fPIE],
-   [check_link_flag([-pie],
+   [check_link_flag([-fPIE -pie],
      [HARDEN_CFLAGS="$HARDEN_CFLAGS -fPIE"
       HARDEN_LDFLAGS="$HARDEN_LDFLAGS -pie"],
-     [check_link_flag([-Wl,-pie],
+     [check_link_flag([-fPIE -Wl,-pie],
        [HARDEN_CFLAGS="$HARDEN_CFLAGS -fPIE"
         HARDEN_LDFLAGS="$HARDEN_LDFLAGS -Wl,-pie"])])])