--- configure.ac.orig	2014-03-27 05:58:08.000000000 -0500
+++ configure.ac	2015-10-28 17:32:51.000000000 -0500
@@ -196,21 +196,9 @@
 
 if test "x${want_png}" = "xyes" ; then
 
-   PKG_CHECK_MODULES([PNG], [libpng15 zlib],
-      [have_libpng="yes"],
-      [
-       PKG_CHECK_MODULES([PNG], [libpng14 zlib],
-          [have_libpng="yes"],
-          [
-           PKG_CHECK_MODULES([PNG], [libpng12 zlib],
-              [have_libpng="yes"],
-              [
                PKG_CHECK_MODULES([PNG], [libpng zlib],
                   [have_libpng="yes"],
                   [have_libpng="no"])
-              ])
-          ])
-      ])
 
    if ! test "x${have_libpng}" = "xyes" ; then