AC_INIT
AC_CONFIG_AUX_DIR([.])
AC_CONFIG_MACRO_DIR([m4])
AM_INIT_AUTOMAKE(isl, 0.04)
AC_SUBST(versioninfo)
versioninfo=4:0:0

AC_PROG_CC

AX_CC_MAXOPT
AX_GCC_WARN_UNUSED_RESULT

AC_PROG_LIBTOOL

AC_CHECK_PROG(PERL, perl, perl, [])
AC_CHECK_PROG(PDFLATEX, pdflatex, pdflatex, [])
AC_CHECK_PROG(POD2HTML, pod2html, pod2html, [])

AM_CONDITIONAL(GENERATE_DOC, test -n "$PERL" -a -n "$PDFLATEX" -a -n "$POD2HTML")

AX_CREATE_STDINT_H(include/isl_stdint.h)

AX_SUBMODULE(gmp,system,system)

AC_SUBST(GMP_CPPFLAGS)
AC_SUBST(GMP_LDFLAGS)
if test "x$with_gmp_prefix" != "x"; then
	isl_configure_args="$isl_configure_args --with-gmp=$with_gmp_prefix"
	GMP_CPPFLAGS="-I$with_gmp_prefix/include"
	GMP_LDFLAGS="-L$with_gmp_prefix/lib"
fi
SAVE_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$GMP_CPPFLAGS $CPPFLAGS"
need_get_memory_functions=false
AC_CHECK_DECLS(mp_get_memory_functions,[],[
	need_get_memory_functions=true
],[#include <gmp.h>])
CPPFLAGS="$SAVE_CPPFLAGS"
AM_CONDITIONAL(NEED_GET_MEMORY_FUNCTIONS, test x$need_get_memory_functions = xtrue)

AX_SUBMODULE(piplib,no|system|build,no)

have_piplib=false
AC_SUBST(PIPLIB_CPPFLAGS)
AC_SUBST(PIPLIB_LDFLAGS)
AC_SUBST(PIPLIB_LIBS)
case "$with_piplib" in
	build)
		PIPLIB_CPPFLAGS="-I$piplib_srcdir/include"
		PIPLIB_LIBS="$with_piplib_builddir/libpiplibMP.la"
	;;
	system)
		PIPLIB_LIBS="-lpiplibMP"
		if test "x$with_piplib_prefix" != "x"; then
			PIPLIB_CPPFLAGS="-I$with_piplib_prefix/include"
			PIPLIB_LDFLAGS="-L$with_piplib_prefix/lib"
		fi
		SAVE_CPPFLAGS="$CPPFLAGS"
		SAVE_LDFLAGS="$LDFLAGS"
		CPPFLAGS="$PIPLIB_CPPFLAGS $CPPFLAGS"
		LDFLAGS="$PIPLIB_LDFLAGS $LDFLAGS"
		AC_CHECK_LIB(piplibMP, pip_solve,[
			AC_CHECK_MEMBER(PipOptions.Urs_parms, [], [
				AC_MSG_ERROR([Piplib too old; please install version 1.3.6 or newer])
			],[#include <piplib/piplibMP.h>])
		],[
			AC_MSG_ERROR([Piplib not found])
		])
		CPPFLAGS="$SAVE_CPPFLAGS"
		LDFLAGS="$SAVE_LDFLAGS"
	;;
	no)
	;;
	*)
		AC_MSG_ERROR(unsupported)
	;;
esac
if test "$with_piplib" != "no"; then
	AC_DEFINE(ISL_PIPLIB,,piplib is available)
	have_piplib=true
fi
AM_CONDITIONAL(HAVE_PIPLIB, test x$have_piplib = xtrue)

PACKAGE_CFLAGS="-I$prefix/include/isl"
AX_CREATE_PKGCONFIG_INFO

AX_DETECT_GIT_HEAD
echo '#define GIT_HEAD_ID "'$GIT_HEAD_ID'"' > gitversion.h

AC_CONFIG_HEADERS(config.h)
AC_CONFIG_HEADERS(include/isl_config.h)
AC_CONFIG_FILES(Makefile)
AC_CONFIG_FILES(doc/Makefile)
AC_CONFIG_COMMANDS_POST([
	dnl pass on arguments to subdir configures, but don't
	dnl add them to config.status
	ac_configure_args="$ac_configure_args $isl_configure_args"
])
AC_OUTPUT