+PKG_PROG_PKG_CONFIG
+
+AC_ARG_ENABLE([lbximg],
+ [AS_HELP_STRING([--enable-lbximg],
+ [build the lbximg tool (requires libpng) [default=auto]])],
+ [enable_lbximg=$enableval],
+ [enable_lbximg=auto])
+
+have_libpng=no
+if test x"$enable_lbximg" = x"auto"; then
+DX_CHECK_LIBPNG([1.2], [have_libpng=yes], [have_libpng=no])
+fi
+if test x"$enable_lbximg" = x"yes"; then
+DX_CHECK_LIBPNG([1.2], [have_libpng=yes])
+fi