AC_PREREQ(2.59)

AC_INIT(src/torrent.cpp)
AM_INIT_AUTOMAKE(libtorrent, 0.9)

AM_CONFIG_HEADER(config.h)

AC_PROG_CC
AC_PROG_CPP
AC_PROG_CXX
AC_PROG_INSTALL
AC_PROG_MAKE_SET
AC_PROG_LIBTOOL
# AC_PROG_RANLIB is obsolete by AC_PROC_LIBTOOL

dnl Check for pthreads and boost libraries.
ACX_PTHREAD

AX_BOOST_DATE_TIME

dnl check that Boost.DateTime was found:
if test -z "$BOOST_DATE_TIME_LIB"; then
   AC_MSG_ERROR([unable to find Boost.DateTime library, currently this is required.])
fi

AX_BOOST_FILESYSTEM

dnl check that Boost.Filesystem was found:
if test -z "$BOOST_FILESYSTEM_LIB"; then
   AC_MSG_ERROR([unable to find Boost.Filesystem library, currently this is required.])
fi

AX_BOOST_THREAD

dnl check that Boost.Thread was found:
if test -z "$BOOST_THREAD_LIB"; then
   AC_MSG_ERROR([unable to find Boost.Thread library, currently this is required.])
fi

dnl try different ways of resolving gethostbyname
AC_CHECK_FUNC(gethostbyname, ,
	AC_CHECK_LIB(resolv, gethostbyname, ,
	AC_CHECK_LIB(nsl, gethostbyname, ,
	AC_CHECK_LIB(ws2_32, main, ,
	AC_CHECK_LIB(wsock32, main, ,
	AC_MSG_ERROR([gethostbyname not found. Stopped.])))))
)

dnl the user can choose which zlib to use
AC_ARG_WITH(
	[zlib],
	AS_HELP_STRING([--with-zlib=shipped|system],[Specify the zlib to use, shipped or system. Default is to autodetect system and fallback to shipped.]),
	[[zlib=$withval]],
	[[zlib=detect]]
)
dnl Check the value for the --with-zlib switch
AC_MSG_CHECKING([which zlib implementation to use])
case "$zlib" in
	"detect")
		AC_MSG_RESULT([autodetect])
		AC_CHECK_LIB(z, main,
			[zlib="system"],
			[zlib="shipped"]
		)
		;;
	"shipped")
		AC_MSG_RESULT(shipped)
		;;
	"system")
		AC_MSG_RESULT(system)
		AC_CHECK_LIB(z, main, ,
			AC_MSG_ERROR([libtorrent depends on zlib but zlib was not found on your system])
		)
		;;
	"no")
		AC_MSG_RESULT()
		AC_MSG_ERROR([libtorrent depends on zlib, you must specify either "system" or "shipped".])
		;;
	*)
		AC_MSG_RESULT()
		AC_MSG_ERROR([Unknown zlib option "$zlib". Use either "system" or "shipped".])
esac
if [[ "$zlib" = "shipped" ]]; then
	ZLIB="\$(top_builddir)/zlib/libzlib.la"
	ZLIBDIR="zlib"
	ZLIBINCL="-I\$(top_builddir)/zlib"
	AC_CONFIG_FILES(zlib/Makefile)
elif [[ "$zlib" = "system" ]]; then
	ZLIB="-lz"
	ZLIBDIR=""
	ZLIBINCL=""
fi

dnl make ZLIB and ZLIBDIR visible to Makefiles
AC_SUBST([ZLIB])
AC_SUBST([ZLIBDIR])
AC_SUBST([ZLIBINCL])

dnl want some debugging symbols with that?
AC_ARG_ENABLE(
	[debug],
	AS_HELP_STRING([--enable-debug],[set compiler flags for debug symbols, default is "-g"]),
	[case "$enableval" in
		no)
			DEBUGFLAGS="-DNDEBUG"
			;;
		yes)
			DEBUGFLAGS="-g"
			;;
		*)
			DEBUGFLAGS="$enableval"
			;;
	esac],
	[DEBUGFLAGS="-g"]
)
AC_SUBST(DEBUGFLAGS)

AC_CONFIG_FILES(Makefile src/Makefile include/Makefile examples/Makefile test/Makefile)
AC_OUTPUT