# configure.ac - Copyright 2005, University
#                of Padova, dept. of Pure and Applied
#                Mathematics
#
# This file is part of SGPEMv2.
#
# This is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# SGPEMv2 is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with SGPEMv2; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

dnl ----------------- CONFIGURE ---------------------

AC_INIT([sgpemv2],[0.1],[matteo@member.fsf.org])

if test -f "`pwd`/configure.ac"; then
        AC_MSG_FAILURE([
        ** This seems to be the pkg root directory.
	** Compiling here your sources is considered
	** as unpolite as exploring your nose with 
	** your pinky whilst attending a wedding party.
        ** Please create a new dir as described in
        ** the README file, and then run configure
        ** into it. If you think you've got it right, 
	** please inform the mantainer of this error!
	** He'll thoroughfully bash his head on the wall.], 
	-1 )
fi

AC_GNU_SOURCE
AC_CONFIG_AUX_DIR(config)

AC_CANONICAL_TARGET

dnl starting automake
AM_INIT_AUTOMAKE([dejagnu dist-bzip2])

dnl gettext & libtool
AC_ARG_VAR([LT_LDFLAGS],
[You can use this variable to pass an option 
to libtool when it is in linking mode (for 
example, "-all-static")])
AC_PROG_LIBTOOL
AM_GNU_GETTEXT([external])
AM_GNU_GETTEXT_VERSION([0.14.1])

dnl various requisites
SIGCPP_VERSION=2.0.10
GTKMM_VERSION=2.8.0
CAIRO_VERSION=1.0.0

dnl c++ compiler and flags
AC_PROG_CXX
AC_CHECK_CXXFLAG([CXXFLAGS], [Wall])
AC_CHECK_CXXFLAG([CXXFLAGS], [pedantic])
AC_CHECK_CXXFLAG([CXXFLAGS], [Wextra])
AC_CHECK_CXXFLAG([CXXFLAGS], [Wno-long-long])
AC_CHECK_LDFLAG([LDFLAGS],[--as-needed])

AC_PROG_INSTALL

dnl make
AC_PROG_MAKE_SET

dnl check for python and SWIG
AC_PYTHON_DEVEL([>= '2.3'])
AC_PROG_SWIG
SWIG_ENABLE_CXX
SWIG_PYTHON

dnl check for gtkmm & cairo
PKG_CHECK_MODULES([CAIRO], 
		[cairo >= $CAIRO_VERSION],
		:, AC_MSG_ERROR([$CAIRO_PKG_ERRORS]))
PKG_CHECK_MODULES([GTHREAD], 
		[gthread-2.0 >= $GTKMM_VERSION],
		:, AC_MSG_ERROR([$GTHREAD_PKG_ERRORS]))
PKG_CHECK_MODULES([SIGCPP], 
		[sigc++-2.0 >= $SIGCPP_VERSION],
		:, AC_MSG_ERROR([$SIGCPP_PKG_ERRORS]))
PKG_CHECK_MODULES([GLIBMM], 
		[glibmm-2.4 >= $GTKMM_VERSION],
		:, AC_MSG_ERROR([$GLIBMM_PKG_ERRORS]))
PKG_CHECK_MODULES([GTKMM], 
		[gtkmm-2.4 >= $GTKMM_VERSION],
		:, AC_MSG_ERROR([$GTKMM_PKG_ERRORS]))

dnl use DSO visibility tags for systems that supports it correctly
dnl (for example, GCC 4.0 and above)
dnl see http://gcc.gnu.org/wiki/Visibility for more informations
AH_TEMPLATE([SG_DLLEXPORT],[Attribute for objects to be exported from DSOs])
AH_TEMPLATE([SG_DLLIMPORT],[Attribute for objects to be imported from DSOs])
AH_TEMPLATE([SG_DLLLOCAL], [Attribute for objects local to current DSO])
AH_TEMPLATE([SG_DLLPUBLIC],[Attribute for DSO public objects])

dnl for now it works only with GCC >= 4.0.0
AC_MSG_CHECKING([whether GCC supports DSO visibility attributes])
AC_LANG_PUSH([C++])
AC_COMPILE_IFELSE(
	AC_LANG_PROGRAM([], [
		#if defined __GNUC__ && (__GNUC__) >= 4
		return 0;
		#else
		bails out with a compilation error.
		#endif
	]),[
		AC_MSG_RESULT([yes])
		AC_DEFINE([SG_DLLIMPORT],[/* intentionally left with no value */])
		AC_DEFINE([SG_DLLEXPORT],[__attribute__ ((visibility("default")))])
		AC_DEFINE([SG_DLLLOCAL],[__attribute__ ((visibility("hidden")))])
		AC_DEFINE([SG_DLLPUBLIC],[__attribute__ ((visibility("default")))])

		AC_CHECK_CXXFLAG([VISIB_HIDDEN], [fvisibility=hidden])
		AC_SUBST([VISIB_HIDDEN])
		AC_CHECK_CXXFLAG([CXXFLAGS],[fvisibility-inlines-hidden])
	],[
		AC_MSG_RESULT([no])
		AC_DEFINE([SG_DLLIMPORT],[/* unsupported */])
		AC_DEFINE([SG_DLLEXPORT],[/* unsupported */])
		AC_DEFINE([SG_DLLLOCAL],[/* unsupported */])
		AC_DEFINE([SG_DLLPUBLIC],[/* unsupported */])
])
AC_LANG_POP


dnl check for Doxygen
AC_CHECK_PROG([HAVE_DOXYGEN],[doxygen],[yes])
AC_CHECK_PROG([HAVE_DOT],[dot], [yes])
AM_CONDITIONAL([HAVE_DOXYGEN],[test x$HAVE_DOXYGEN = xyes])

AC_CONFIG_FILES([config/Doxyfile])

AC_CONFIG_HEADERS([config.h:config.h.in])

AC_CONFIG_FILES([ 
Makefile
po/Makefile.in
])
AC_OUTPUT