license: Add GNU all-permissive license header to supporting files.

[liblbx.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index b3bd60caffb67aa956562f30f00819a686c3f92b..d3d35c5b6e1c1f37855b6c858456f83039f31848 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1,18 +1,28 @@
-AC_PREREQ(2.60)
+dnl Copyright (C) 2009 Nick Bowler
+dnl Copying and distribution of this file, with or without modification,
+dnl are permitted in any medium without royalty provided the copyright
+dnl notice and this notice are preserved.  This file is offered as-is,
+dnl without any warranty.
+
+AC_PREREQ([2.62])
 AC_INIT([liblbx], [0.1], [toom-devel@lists.sourceforge.net])
 AC_CONFIG_SRCDIR([src/lbx.c])
 AC_CONFIG_HEADER([config.h])
+AC_CONFIG_MACRO_DIR([m4])
 
-AM_INIT_AUTOMAKE([-Wall -Werror foreign])
+AM_INIT_AUTOMAKE([-Wall -Werror foreign subdir-objects])
 
-AC_PROG_CC
+AC_PROG_CC_C99
+AC_HEADER_ASSERT
 AC_C_BIGENDIAN
 
-AC_PROG_LIBTOOL
+LT_INIT
+
+CHECK_LIBPNG([1.2], [have_libpng=yes], [have_libpng=no])
+AM_CONDITIONAL([BUILD_LBXIMG], [test x"$have_libpng" = x"yes"])
 
 AC_CONFIG_FILES([
        Makefile
-       src/Makefile
 ])
 
 AC_OUTPUT