Test /usr/X11R6/lib/X11/*.a before /usr/X11R6/lib/*.a.

The first test then fails, and short-circuiting means

that the second one is not run at all, so buildreq

does not pick up extra dependencies.

Patch by at@ (see altbug #6797 for more information.)

diff --git a/autoconf/lib/autoconf/libs.m4 b/autoconf/lib/autoconf/libs.m4

index d70babf..b44e901 100644

--- a/autoconf/lib/autoconf/libs.m4

+++ b/autoconf/lib/autoconf/libs.m4

@@ -204,8 +204,8 @@ _ACEOF

     done

     # Open Windows xmkmf reportedly sets LIBDIR instead of USRLIBDIR.

     for ac_extension in so sl a; do

-      if test ! -f "$ac_im_usrlibdir/libX11.$ac_extension" &&

-	 test -f "$ac_im_libdir/libX11.$ac_extension"; then

+      if test -f "$ac_im_libdir/libX11.$ac_extension" &&

+	 test ! -f "$ac_im_usrlibdir/libX11.$ac_extension"; then

 	ac_im_usrlibdir=$ac_im_libdir; break

       fi

     done