# script for autoconf

AC_INIT([GraphThing],[1.3.2])
AC_PREREQ(2.53)
AC_CONFIG_SRCDIR(src/graph.h)
AC_CONFIG_HEADER(src/config.h)

AC_DEFINE_UNQUOTED(GT_VERSION, "$PACKAGE_VERSION")
AC_SUBST(GT_VERSION)

# Check out C++ compiler
AC_PROG_CC
AC_PROG_CXX
AC_CXX_NAMESPACES
AC_C_PROTOTYPES
# TODO: Check for PROTOTYPES being defined
AC_C_STRINGIZE
if test $ac_cv_c_stringize != yes; then
	AC_MSG_ERROR([no ANSI stringizing operator])
fi
AC_CXX_BOOL
AC_CXX_EXCEPTIONS
AC_CXX_HAVE_SSTREAM
AC_CXX_HAVE_STD
AC_CXX_HAVE_STL
AC_CXX_MEMBER_CONSTANTS

# Other programs
AC_PROG_YACC
if test "$YACC" != "bison -y"; then
	AC_MSG_ERROR([I'd much prefer to use GNU bison])
fi
AC_PROG_LEX
if test "$LEX" != "flex"; then
	AC_MSG_ERROR([I'd much prefer to use GNU flex])
fi
AC_PROG_INSTALL
AC_PROG_MAKE_SET
AC_PROG_LN_S



AC_PATH_PROG(unamepath, uname)
if test "x$unamepath" = "x"; then
	system="unknown"
else
	AC_MSG_CHECKING(system type)
	system=`$unamepath -s`
	AC_MSG_RESULT($system)
	if test "$system" = "Linux"; then
		AC_DEFINE(USING_LINUX)
	fi
	if test "$system" = "FreeBSD"; then
		AC_DEFINE(USING_FREEBSD)
	fi
	if test "$system" = "Darwin"; then
		AC_DEFINE(USING_OSX)
	fi
fi


# Check for needed headers
AC_CHECK_HEADERS([math.h stdio.h stdlib.h string.h time.h unistd.h],
		 [],
		 [exit])

# Check for maths library
AC_CHECK_LIB(m, atan2, , AC_MSG_ERROR([Missing maths library (-lm)]))

# Check for GNU make
CHECK_GNU_MAKE
if test "x$_cv_gnu_make_command" = "x"; then
	echo "#############################################"
	echo "# Sorry, GNU Make is required to build.     #"
	echo "#############################################"
	exit 1
fi

# Check for wxWidgets
AM_PATH_WXWIDGETS(2.6.1, , exit)

# Using '--disable-nls' removes the compilation of translation stuff
turn_on_nls="yes"
AC_ARG_ENABLE(nls,
	AS_HELP_STRING([--disable-nls], [Do not use Native Language Support]),
	[ turn_on_nls="$enableval" ],
	[ turn_on_nls="yes" ])
if test "$turn_on_nls" = "yes"; then
	AC_DEFINE(ENABLE_NLS)
	NLS_OBJS="lang.o"
	AC_SUBST(NLS_OBJS)
	NLS_PARSERS="lang."
	AC_SUBST(NLS_PARSERS)
fi

# Using '--enable-langdialog' turns on the LangDialog
use_langdialog="no"
AC_ARG_ENABLE(langdialog,
	AS_HELP_STRING([--enable-langdialog], [Use the language selection dialog (needs NLS)]),
	[ use_langdialog="$enableval" ],
	[ use_langdialog="no" ])
if test "$use_langdialog" = "yes"; then
	if test "$turn_on_nls" = "yes"; then
		NLS_OBJS="$NLS_OBJS langdialog.o"
		AC_SUBST(NLS_OBJS)
	else
		echo "###"
		echo "### ERROR: The language selection dialog (LangDialog)"
		echo "###        requires NLS. Please don't use --disable-nls."
		echo "###"
		exit 1
	fi
else
	AC_DEFINE(LANG_DIALOG_IS_DISABLED)
fi

# Using '--with-dev' changes compile-time flags to be more strict
turn_on_dev="no"
AC_ARG_WITH(dev, [  --with-dev              Enable developer flags],
[
	turn_on_dev="yes"
	EXTRA_CFLAGS='-Wall \
	 -Wpointer-arith -Werror -ggdb';
	AC_SUBST(EXTRA_CFLAGS)

	EXTRA_PROGS='unit_test chrom'
	AC_SUBST(EXTRA_PROGS)

	AC_DEFINE(GT_WITH_DEV)
])

# Using '--with-prof' enables profiling
turn_on_prof="no"
AC_ARG_WITH(prof, [  --with-prof             Enable profiling],
[
	turn_on_prof="yes"
	EXTRA_CFLAGS="$EXTRA_CFLAGS -g -pg"
	EXTRA_LDFLAGS="-g -pg"
	AC_SUBST(EXTRA_CFLAGS)
	AC_SUBST(EXTRA_LDFLAGS)
])

# Write stuff to Makefiles
AC_CONFIG_FILES([GNUmakefile
	src/GNUmakefile
	graphthing.1])
AC_OUTPUT
#ln -sf src/config.h config.h

# Tell them about the options they have selected
echo "###"
if test "$turn_on_nls" = "yes"; then
	echo "### * Native Language Support enabled."
	if test "$use_langdialog" = "yes"; then
		echo "###     (with LangDialog enabled)."
	else
		echo "###     (but no LangDialog)."
	fi
else
	echo "### * Native Language Support disabled."
fi
echo "###"

# If they've turned on Developer Flags, give a warning
if test "$turn_on_dev" = "yes"; then
	echo "###"
	echo "### WARNING: You have enabled Developer flags. Unless you"
	echo "###          are a developer, you are strongly advised to"
	echo "###          leave developer flags turned off, or you may"
	echo "###          have problems compiling GraphThing."
	echo "###"
fi

# If they've turned on Profiling, give a warning
if test "$turn_on_prof" = "yes"; then
	echo "###"
	echo "### WARNING: You have enabled Profiling. Unless you are a"
	echo "###          developer, you are strongly advised to leave"
	echo "###          profiling turned off, or you may have problems"
	echo "###          compiling or running GraphThing."
	echo "###"
fi	


echo "##################################################"
echo "   GraphThing is now configured. Simply type...  "
echo "           $_cv_gnu_make_command                 "
echo "   ... and GraphThing will be compiled.          "
echo "##################################################"