configure: check for __ILP32__ if arch is x86_64
otherwise a multilib compiler used with -mx32 will not be detected
properly.
diff --git a/configure b/configure
index 3c01bf4..eb72a1e 100755
--- a/configure
+++ b/configure
@@ -410,6 +410,10 @@
SUBARCH=
t="$CFLAGS_C99FSE $CPPFLAGS $CFLAGS_AUTO $CFLAGS"
+if test "$ARCH" = "x86_64" ; then
+trycppif __ILP32__ "$t" && ARCH=x32
+fi
+
if test "$ARCH" = "arm" ; then
trycppif __ARMEB__ "$t" && SUBARCH=${SUBARCH}eb
trycppif __ARM_PCS_VFP "$t" && SUBARCH=${SUBARCH}hf