From b98b560ad3092f32e8a1e76090799ad843ff38f0 Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Sun, 29 Oct 2017 23:21:25 +0000
Subject:  Support default pie

---
 configure | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'configure')

diff --git a/configure b/configure
index b1c279f..65166e1 100755
--- a/configure
+++ b/configure
@@ -295,6 +295,16 @@ if [ "x$target" != "x$(cat $sysdeps/target)" ] ; then
   exit 1
 fi
 
+defaultpie=false
+echo "Checking whether we're building PIE..."
+if $CC_AUTO $CPPFLAGS_AUTO $CPPFLAGS $CPPFLAGS_POST $CFLAGS_AUTO $CFLAGS $CFLAGS_POST -dM -E - < /dev/null | grep -qF __PIE__ ; then
+  defaultpie=true
+  CFLAGS_AUTO="$CFLAGS_AUTO -fPIC"
+  echo "  ... yes"
+else
+  echo "  ... no"
+fi
+
 spawn_lib=$(cat $sysdeps/spawn.lib)
 socket_lib=$(cat $sysdeps/socket.lib)
 sysclock_lib=$(cat $sysdeps/sysclock.lib)
@@ -407,6 +417,11 @@ if $shared ; then
 else
   echo "DO_SHARED :="
 fi
+if $defaultpie ; then
+  echo "DEFAULT_PIE := 1"
+else
+  echo "DEFAULT_PIE :="
+fi
 
 exec 1>&3 3>&-
 echo "  ... done."
-- 
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