AC_PREREQ(2.60)

AC_INIT([libtorrent-rasterbar], [0.14], [arvid@rasterbar.com])
AM_INIT_AUTOMAKE(foreign 1.10)
AC_CONFIG_SRCDIR([src/torrent.cpp])


dnl ---------------------------------------------------------------------------
dnl interface version info
dnl ---------------------------------------------------------------------------
dnl Advanced information about versioning:
dnl   * "Writing shared libraries" by Mike Hearn
dnl         http://navi.cx/~mike/writing-shared-libraries.html
dnl   * libtool.info chapter "Versioning"
dnl   * libtool.info chapter "Updating library version information"
dnl ---------------------------------------------------------------------------
dnl Versioning:
dnl  - CURRENT (Major):  Increment if the interface has changes. AGE is always
dnl                      *changed* at the same time.
dnl  - AGE (Micro):      Increment if any interfaces have been added; set to 0
dnl                      if any interfaces have been removed. Removal has
dnl                      precedence over adding, so set to 0 if both happened.
dnl                      It denotes upward compatibility.
dnl  - REVISION (Minor): Increment any time the source changes; set to
dnl                      0 if you incremented CURRENT.
dnl
dnl  To summarize. Any interface *change* increment CURRENT. If that interface
dnl  change does not break upward compatibility (ie it is an addition),
dnl  increment AGE, Otherwise AGE is reset to 0. If CURRENT has changed,
dnl  REVISION is set to 0, otherwise REVISION is incremented.
dnl ---------------------------------------------------------------------------
VERSION_INFO_CURRENT=1
VERSION_INFO_REVISION=0
VERSION_INFO_AGE=0
INTERFACE_VERSION_INFO=$VERSION_INFO_CURRENT:$VERSION_INFO_REVISION:$VERSION_INFO_AGE
AC_SUBST(INTERFACE_VERSION_INFO)
dnl ---------------------------------------------------------------------------

AC_PROG_CC

if test -z "$(which $CC)"; then
    AC_MSG_ERROR([Unable to find a working C compiler, giving up.])
fi

AC_PROG_CPP
AC_PROG_CXX

if test -z "$(which $CXX)"; then
    AC_MSG_ERROR([Unable to find a working C++ compiler, giving up.])
fi

AC_CACHE_SAVE
AC_PROG_INSTALL
AC_PROG_MAKE_SET
AC_PROG_LIBTOOL
# AC_PROG_RANLIB is obsolete by AC_PROC_LIBTOOL

AC_SYS_LARGEFILE

dnl Check for pthreads.
ACX_PTHREAD
dnl Apply pthread config.
CC=$PTHREAD_CC
CPPFLAGS="$CPPFLAGS $PTHREAD_CFLAGS"
LIBS="$LIBS $PTHREAD_LIBS"

AM_CONDITIONAL([ENABLE_SHIPPED_ASIO], false)

dnl Check for boost libraries.
AX_BOOST_BASE([1.35],[
   AX_BOOST_SYSTEM
   dnl check that Boost.System was found:
   if test -z "$BOOST_SYSTEM_LIB"; then
      AC_MSG_ERROR([unable to find Boost.System library, currently this is required.])
   fi

   AX_BOOST_ASIO
   dnl check that Boost.Asio was found:
   if test -z "$BOOST_ASIO_LIB"; then
      AC_MSG_ERROR([Unable to find Boost.Asio library, currently this is required.])
   fi
],[
   AX_BOOST_BASE([1.34],[

   dnl the user can choose which Asio library to use
   AC_ARG_WITH([asio],
	AS_HELP_STRING([--with-asio=shipped|system|your_path],
	[Specify the Asio library to use, shipped or system. Default is to use shipped library. You can also specify a path for your system.]),
	[[asio=$withval]],
	[[asio=shipped]]
   )

   dnl Check the value for the --with-asio switch
   AC_MSG_CHECKING([which Asio implementation to use])
   case "$asio" in
	"shipped")
		AC_MSG_RESULT(shipped)
		ASIO_HPP=`dirname $0`/include/libtorrent/asio.hpp
		ASIO_DIR=`dirname $0`/include/libtorrent/asio
		AC_CHECK_FILES($ASIO_HPP $ASIO_DIR/ssl/stream.hpp $ASIO_DIR/ip/tcp.hpp,
			enable_shipped_asio=yes,
			AC_MSG_ERROR([libtorrent-rasterbar depends on Asio library but it was not found.])
		)
		;;
	"system")
		AC_MSG_RESULT(system)
		ASIO_HPP=/usr/include/asio.hpp
		ASIO_DIR=/usr/include/asio
		AC_CHECK_FILES($ASIO_HPP $ASIO_DIR/ssl/stream.hpp $ASIO_DIR/ip/tcp.hpp,
			enable_shipped_asio=no,
			AC_MSG_ERROR([libtorrent-rasterbar depends on Asio library but it was not found on your system.])
		)
		;;
	*)
		AC_MSG_RESULT(detect)
		ASIO_HPP=$asio/../asio.hpp
		ASIO_DIR=$asio
		AC_CHECK_FILES($ASIO_HPP $ASIO_DIR/ssl/stream.hpp $ASIO_DIR/ip/tcp.hpp,
			enable_shipped_asio=no,
			AC_MSG_ERROR([libtorrent-rasterbar depends on Asio library but it was not found in the path you specified.])
		)
		;;
    esac
    AM_CONDITIONAL([ENABLE_SHIPPED_ASIO], [test x$enable_shipped_asio = "xyes"])
])
])

AC_MSG_NOTICE([BOOST_CPPFLAGS=$BOOST_CPPFLAGS])
AC_MSG_NOTICE([BOOST_LDFLAGS=$BOOST_LDFLAGS])

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

AX_BOOST_REGEX
dnl check that Boost.Regex was found:
if test -z "$BOOST_REGEX_LIB"; then
   AC_MSG_RESULT([Unable to find Boost.Regex library, example test_client will not be build.])
   BUILD_TESTCLIENT=no;
fi

AX_BOOST_PROGRAM_OPTIONS
dnl check that Boost.Program_options was found:
if test -z "$BOOST_PROGRAM_OPTIONS_LIB"; then
   AC_MSG_RESULT([Unable to find Boost.Program_options library, example test_client will not be build.])
   BUILD_TESTCLIENT=no;
fi

dnl Apply boost config.
CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
LDFLAGS="$LDFLAGS $BOOST_LDFLAGS"

if [[ "x$BUILD_TESTCLIENT" != "xno" ]]; then
	CLIENT_TEST_BIN=client_test;
	AC_SUBST(CLIENT_TEST_BIN)
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, [LIBS="$LIBS -lws2_32 -lwsock32";] , 
	AC_MSG_ERROR([wsock32 not found. Stopped.])) ,
	AC_MSG_ERROR([gethostbyname not found. Stopped.]))))
)

dnl find out what kind of logging to use
AC_ARG_WITH(
	[logging],
	AS_HELP_STRING([--with-logging=none|default|verbose],[Specify how much logging to use. Default is none.]),
	[[logging=$withval]],
	[[logging=none]]
)

COMPILETIME_OPTIONS=""
dnl Check the value for the --with-logging switch
AC_MSG_CHECKING([what form of logging to use])
case "$logging" in
	"none")
		AC_MSG_RESULT(none)
		;;
	"default")
		AC_MSG_RESULT(default)
		AC_DEFINE(TORRENT_LOGGING,,[define to use some logging])
		COMPILETIME_OPTIONS+="-DTORRENT_LOGGING "
		;;
	"verbose")
		AC_MSG_RESULT(verbose)
		AC_DEFINE(TORRENT_VERBOSE_LOGGING,,[define to use verbose logging])
		COMPILETIME_OPTIONS+="-DTORRENT_VERBOSE_LOGGING "
		;;
	*)
		AC_MSG_RESULT()
		AC_MSG_ERROR([Unknown logging option "$logging". Use either "none", "default" or "verbose".])
		;;
esac

dnl find out what kind of dht-support to use
AC_ARG_WITH(
	[dht],
	AS_HELP_STRING([--with-dht=on|off|logging],[Specify how to use DHT support. Option logging will add extra logging. Default is on.]),
	[[dht=$withval]],
	[[dht=on]]
)
dnl Check the value for the --with-dht switch
AC_MSG_CHECKING([how to use DHT])
case "$dht" in
	"on")
		AC_MSG_RESULT(on)
		;;
	"off")
		AC_MSG_RESULT(off)
		AC_DEFINE(TORRENT_DISABLE_DHT,,[define not to use DHT support])
		COMPILETIME_OPTIONS+="-DTORRENT_DISABLE_DHT "
		;;
	"logging")
		AC_MSG_RESULT(logging)
		AC_DEFINE(TORRENT_DHT_VERBOSE_LOGGING,,[define to use DHT support with extra logging])
		COMPILETIME_OPTIONS+="-DTORRENT_DHT_VERBOSE_LOGGING "
		;;
	*)
		AC_MSG_RESULT()
		AC_MSG_ERROR([Unknown dht option "$dht". Use either "on", "off" or "logging".])
		;;
esac
AM_CONDITIONAL(USE_DHT, test "x$dht" != "xoff")

dnl encryption support.
AC_ARG_WITH(
       [encryption],
       AS_HELP_STRING([--with-encryption=on|off],[Specify how to use encryption support. Default is on.]),
       [[encryption=$withval]],
       [[encryption=on]]
)

dnl Check the value for the --with-encryption switch
AC_MSG_CHECKING([how to use encryption])
case "$encryption" in
       "on")
               AC_MSG_RESULT(on)
               CHECK_SSL()
               AC_DEFINE(TORRENT_USE_OPENSSL,,[define to use openssl with libtorrent-rasterbar])
               COMPILETIME_OPTIONS+="-DTORRENT_USE_OPENSSL "

               ;;
       "off")
               AC_MSG_RESULT(off)
               AC_DEFINE(TORRENT_DISABLE_ENCRYPTION,,[define not to use encryption support])
               COMPILETIME_OPTIONS+="-DTORRENT_DISABLE_ENCRYPTION "
               ;;
       *)
               AC_MSG_RESULT()
               AC_MSG_ERROR([Unknown encryption option "$encryption". Use either "on" or "off".])
               ;;
esac
AM_CONDITIONAL(USE_ENCRYPTION, test "x$encryption" != "xoff")

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-rasterbar depends on zlib but zlib was not found on your system.])
		)
		;;
	"no")
		AC_MSG_RESULT()
		AC_MSG_ERROR([libtorrent-rasterbar 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"
	AM_CONDITIONAL([ENABLE_SHIPPED_ZLIB], true)
	ZLIBINCL="-I\$(top_srcdir)/zlib"
elif [[ "$zlib" = "system" ]]; then
	ZLIB="-lz"
	AM_CONDITIONAL([ENABLE_SHIPPED_ZLIB], false)
	ZLIBINCL=""
fi

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

dnl Check whether the examples should be build
AC_ARG_ENABLE(
	[examples],
	AS_HELP_STRING([--enable-examples],[Build the examples. Default is not to build them.]),
	[[examples=$enableval]],
	[[examples=no]]
)
dnl Check the value of the --with-examples switch
AC_MSG_CHECKING([if the examples should be build])
case "$examples" in
	"yes")
		AC_MSG_RESULT(yes)
		AM_CONDITIONAL([ENABLE_EXAMPLES], true)
		;;
	"no")
		AC_MSG_RESULT(no)
		AM_CONDITIONAL([ENABLE_EXAMPLES], false)
		;;
	"")
		AC_MSG_RESULT(yes (default))
		AM_CONDITIONAL([ENABLE_EXAMPLES], true)
		;;
	*)
		AC_MSG_RESULT()
		AC_MSG_ERROR([Unknown --enable-examples option "$examples". Use either "yes" or "no".])
		;;
esac

dnl Check whether the tests should be build
AC_ARG_ENABLE(
	[tests],
	AS_HELP_STRING([--enable-tests],[Build test files. Default is not to build them.]),
	[[tests=$enableval]],
	[[tests=no]]
)
dnl Check the value of the --with-tests switch
AC_MSG_CHECKING([if test files should be build])
case "$tests" in
	"yes")
		AC_MSG_RESULT(yes)
		AM_CONDITIONAL([ENABLE_TESTS], true)
		;;
	"no")
		AC_MSG_RESULT(no)
		AM_CONDITIONAL([ENABLE_TESTS], false)
		;;
	"")
		AC_MSG_RESULT(yes (default))
		AM_CONDITIONAL([ENABLE_TESTS], true)
		;;
	*)
		AC_MSG_RESULT()
		AC_MSG_ERROR([Unknown --enable-tests option "$tests". Use either "yes" or "no".])
		;;
esac

dnl Set some defines if we are building a shared library
if [[ "x$enable_shared" == "xyes" ]]; then
	AC_DEFINE(TORRENT_BUILDING_SHARED,,[Make sure the functions and classes are exported.])
	AC_DEFINE(TORRENT_LINKING_SHARED,,[Make sure the functions and classes are exported.])
fi

dnl want some debugging symbols with that?
AC_ARG_ENABLE(
	[debug],
	AS_HELP_STRING([--enable-debug],[Set compiler flags for debug symbols, default is no debugging.]),
	[case "$enableval" in
		no)
			AC_DEFINE(NDEBUG,,[Define to disable debugging])
			DEBUGFLAGS=""
			COMPILETIME_OPTIONS+="-DNDEBUG "
			;;
		yes)
			DEBUGFLAGS="-g"
			COMPILETIME_OPTIONS+="-DLT_DEBUG "
			;;
		*)
			DEBUGFLAGS="$enableval"
			;;
	esac],
	[DEBUGFLAGS=""
	AC_DEFINE(NDEBUG,,[Define to disable debugging])]
)
AC_SUBST(DEBUGFLAGS)

dnl Compile time options.
AC_SUBST(COMPILETIME_OPTIONS)

AC_OUTPUT([Makefile src/Makefile include/Makefile zlib/Makefile examples/Makefile test/Makefile libtorrent-rasterbar.pc])