-dnl Dirty hack to disable useless C++/Fortran checks
-AC_DEFUN([AC_LIBTOOL_LANG_CXX_CONFIG], [:])
-AC_DEFUN([AC_LIBTOOL_LANG_F77_CONFIG], [:])
-
-AC_PROG_LIBTOOL
-
-# libpng
-PKG_CHECK(libpng, yes, [PNG], [libpng-config], [png.h], png,
- png_create_write_struct, libpng, [http://www.libpng.org/])
-AC_SUBST(PNG_CFLAGS)
-AC_SUBST(PNG_LIBS)