Add pie test, don't double build on pie

1 files changed, 14 insertions, 0 deletions

diff --git a/configure b/configure
index f34dcd0..9d84974 100755
--- a/configure
+++ b/configure
@@ -377,6 +377,15 @@ if test -z "$target" ; then
 fi
 echo "  ... $target"
 
+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 -F __PIE__ ; then
+  defaultpie=true
+  echo "  ... yes"
+else
+  echo "  ... no"
+fi
+
 tryflag CFLAGS_AUTO -std=c99
 tryflag CFLAGS -fomit-frame-pointer
 tryflag CFLAGS_AUTO -fno-exceptions
@@ -586,6 +595,11 @@ if $shared ; then
 else
   echo "SHARED_LIBS :="
 fi
+if $defaultpie ; then
+  echo "DEFAULT_PIE := true"
+else
+  echo "DEFAULT_PIE :="
+fi
 
 exec 1>&3 3>&-
 echo "  ... done."