AC_INIT([mod_auth_mellon],m4_esyscmd([tools/git-version-gen .tarball-version]),[olav.morken@uninett.no])
AC_CONFIG_HEADERS([config.h])

# We require support for C99.
AC_PROG_CC_C99

AC_SUBST(NAMEVER, AC_PACKAGE_TARNAME()-AC_PACKAGE_VERSION())


# This section defines the --with-apxs2 option.
AC_ARG_WITH(
	[apxs2],
	[  --with-apxs2=PATH       Full path to the apxs2 executable.],
	[
		APXS2=${withval}
	],)


if test "x$APXS2" = "x"; then
   # The user didn't specify the --with-apxs2-option.

   # Search for apxs2 in the specified directories
   AC_PATH_PROG(APXS2, apxs2,,
		/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin)

   if test "x$APXS2" = "x"; then
      # Didn't find apxs2 in any of the specified directories.
      # Search for apxs instead.
      AC_PATH_PROG(APXS2, apxs,,
		   /usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin)
   fi

fi

# Test if $APXS2 exists and is an executable.
if test ! -x "$APXS2"; then
   # $APXS2 isn't a executable file.
   AC_MSG_ERROR([
Could not find apxs2. Please spesify the path to apxs2
using the --with-apxs2=/full/path/to/apxs2 option.
The executable may also be named 'apxs'.
])
fi

AC_ARG_ENABLE(
        [diagnostics],
        [AS_HELP_STRING([--enable-diagnostics],
        [Build with diagnostic support])],
        [],
        [enable_diagnostics=no])

AS_IF([test "x$enable_diagnostics" != xno],
      [AC_DEFINE([ENABLE_DIAGNOSTICS],[],[build with diagnostics])])

# Replace any occurances of @APXS2@ with the value of $APXS2 in the Makefile.
AC_SUBST(APXS2)

# We need the lasso library for SAML2 communication.
PKG_CHECK_MODULES(LASSO, lasso)
saved_LIBS=$LIBS; LIBS="$LIBS $LASSO_LIBS";
AC_CHECK_LIB(lasso, lasso_server_new_from_buffers,
	     [AC_DEFINE([HAVE_lasso_server_new_from_buffers],[],
             [lasso library exports lasso_server_new_from_buffers])])
AC_CHECK_LIB(lasso, lasso_server_load_metadata,
             [AC_DEFINE([HAVE_lasso_server_load_metadata],[],
             [lasso library exports lasso_server_load_metadata])])
AC_CHECK_LIB(lasso, lasso_profile_set_signature_verify_hint,
             [AC_DEFINE([HAVE_lasso_profile_set_signature_verify_hint],[],
             [lasso library exports lasso_profile_set_signature_verify_hint])])
AC_CHECK_LIB(lasso, lasso_ecp_request_new,
             [AC_DEFINE([HAVE_ECP],[],
             [lasso library supports ECP profile])])
LIBS=$saved_LIBS;
AC_SUBST(LASSO_CFLAGS)
AC_SUBST(LASSO_LIBS)

# We need the curl library for HTTP-Artifact downloads.
PKG_CHECK_MODULES(CURL, libcurl)
AC_SUBST(CURL_CFLAGS)
AC_SUBST(CURL_LIBS)

# We also need openssl for its random number generator.
PKG_CHECK_MODULES(OPENSSL, openssl)
AC_SUBST(OPENSSL_CFLAGS)
AC_SUBST(OPENSSL_LIBS)

# We need at least version 2.12 of GLib.
PKG_CHECK_MODULES([GLIB], [glib-2.0 >= 2.12])
AC_SUBST(GLIB_CFLAGS)
AC_SUBST(GLIB_LIBS)

AC_SUBST(MELLON_CFLAGS)

# Test to see if we can include lasso/utils.h
# AC_CHECK_HEADER won't work correctly unless we specifiy the include directories
# found in the LASSO_CFLAGS. Save and restore CFLAGS and CPPFLAGS.
saved_CFLAGS=$CFLAGS
saved_CPPFLAGS=$CPPFLAGS
CFLAGS="$CFLAGS $pkg_cv_LASSO_CFLAGS"
CPPFLAGS="$CPPFLAGS $pkg_cv_LASSO_CFLAGS"
AC_CHECK_HEADER([lasso/utils.h], LASSO_CFLAGS="$LASSO_CFLAGS -DHAVE_LASSO_UTILS_H")
CFLAGS=$saved_CFLAGS
CPPFLAGS=$saved_CPPFLAGS

# Determine what definitions exist in Lasso
saved_CFLAGS=$CFLAGS
CFLAGS="$CFLAGS $pkg_cv_LASSO_CFLAGS"
AC_CHECK_DECLS([LASSO_SIGNATURE_METHOD_RSA_SHA256,
                LASSO_SIGNATURE_METHOD_RSA_SHA384,
                LASSO_SIGNATURE_METHOD_RSA_SHA512,
               ], [], [], [#include <lasso/xml/xml.h>])
CFLAGS=$saved_CFLAGS

# Create Makefile from Makefile.in
AC_CONFIG_FILES([Makefile])
AC_OUTPUT