Index: b/configure.in
===================================================================
--- a/configure.in
+++ b/configure.in
@@ -250,12 +250,13 @@
 
 
 AC_CHECK_HEADER(gif_lib.h,
-  [AC_CHECK_LIB(ungif, DGifOpenFileName,
-    [GIFLIBS="-lungif"
-     SUPPORT_LIBS="$SUPPORT_LIBS -lungif"; AC_DEFINE(HAVE_LIBGIF, 1, [ ])],
-    [AC_CHECK_LIB(gif, DGifOpenFileName,
-      [GIFLIBS="-lgif"
-      SUPPORT_LIBS="$SUPPORT_LIBS -lgif"
+  [AC_CHECK_LIB(gif, DGifOpenFileName,
+    [GIFLIBS="-lgif"
+     SUPPORT_LIBS="$SUPPORT_LIBS -lgif"
+     AC_DEFINE(HAVE_LIBGIF, 1, [ ])],
+    [AC_CHECK_LIB(ungif, DGifOpenFileName,
+      [GIFLIBS="-lungif"
+       SUPPORT_LIBS="$SUPPORT_LIBS -lungif"
        AC_DEFINE(HAVE_LIBGIF, 1, [ ])],
       [AC_MSG_ERROR(*** GIF library file not found ***)], 
       $GX_LIBS)],