# synergy -- mouse and keyboard sharing utility
# Copyright (C) 2009 Chris Schoeneman, Nick Bolton, Sorin Sbarnea
# 
# This package is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# found in the file COPYING that should have accompanied this file.
# 
# This package 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 this program.  If not, see <http://www.gnu.org/licenses/>.

# Declare libs, so we can use list in linker later. There's probably 
# a more elegant way of doing this; with SCons, when you check for the
# lib, it is automatically passed to the linker.
set(libs)

# Depending on the platform, pass in the required defines.
if (UNIX)

	# For config.h, detect the libraries, functions, etc.
	include(CheckIncludeFiles)
	include(CheckLibraryExists)
	include(CheckFunctionExists)
	include(CheckTypeSize)
	include(CheckIncludeFileCXX)
	include(CheckSymbolExists)
	include(CheckCSourceCompiles)

	check_include_file_cxx(istream HAVE_ISTREAM)
	check_include_file_cxx(ostream HAVE_OSTREAM)
	check_include_file_cxx(sstream HAVE_SSTREAM)

	check_include_files(inttypes.h HAVE_INTTYPES_H)
	check_include_files(locale.h HAVE_LOCALE_H)
	check_include_files(memory.h HAVE_MEMORY_H)
	check_include_files(stdlib.h HAVE_STDLIB_H)
	check_include_files(strings.h HAVE_STRINGS_H)
	check_include_files(string.h HAVE_STRING_H)
	check_include_files(sys/select.h HAVE_SYS_SELECT_H)
	check_include_files(sys/socket.h HAVE_SYS_SOCKET_H)
	check_include_files(sys/stat.h HAVE_SYS_STAT_H)
	check_include_files(sys/time.h HAVE_SYS_TIME_H)
	check_include_files(sys/utsname.h HAVE_SYS_UTSNAME_H)
	check_include_files(unistd.h HAVE_UNISTD_H)
	check_include_files(wchar.h HAVE_WCHAR_H)

	check_function_exists(getpwuid_r HAVE_GETPWUID_R)
	check_function_exists(gmtime_r HAVE_GMTIME_R)
	check_function_exists(nanosleep HAVE_NANOSLEEP)
	check_function_exists(poll HAVE_POLL)
	check_function_exists(sigwait HAVE_POSIX_SIGWAIT)
	check_function_exists(strftime HAVE_STRFTIME)
	check_function_exists(vsnprintf HAVE_VSNPRINTF)
	check_function_exists(inet_aton HAVE_INET_ATON)
	
	# For some reason, the check_function_exists macro doesn't detect
	# the inet_aton on some pure Unix platforms (e.g. sunos5). So we
	# need to do a more detailed check and also include some extra libs.
	if (NOT HAVE_INET_ATON)

		set(CMAKE_REQUIRED_LIBRARIES nsl)
		check_c_source_compiles(
			"#include <arpa/inet.h>\n int main() { inet_aton(0, 0); }" 
			HAVE_INET_ATON_ADV)
		set(CMAKE_REQUIRED_LIBRARIES)

		if (HAVE_INET_ATON_ADV)
			
			# Override the previous fail.
			set(HAVE_INET_ATON 1)

			# Assume that both nsl and socket will be needed,
			# it seems safe to add socket on the back of nsl,
			# since socket only ever needed when nsl is needed.
			list(APPEND libs nsl socket)

		endif()

	endif()

	check_type_size(char SIZEOF_CHAR)
	check_type_size(int SIZEOF_INT)
	check_type_size(long SIZEOF_LONG)
	check_type_size(short SIZEOF_SHORT)

	# pthread is used on both Linux and Mac
	check_library_exists("pthread" pthread_create "" HAVE_PTHREAD)
	if (HAVE_PTHREAD)
		list(APPEND libs pthread)
	else (HAVE_PTHREAD)
		message(FATAL_ERROR "Missing library: pthread")
	endif()
	
	if (APPLE)

		# build mac os x universal
		set(CMAKE_OSX_ARCHITECTURES "ppc;i386"
			CACHE STRING "Build architectures for OSX" FORCE)

		find_library(lib_ScreenSaver ScreenSaver)
		find_library(lib_IOKit IOKit)
		find_library(lib_ApplicationServices ApplicationServices)
		find_library(lib_Foundation Foundation)
		find_library(lib_Carbon Carbon)

		list(APPEND libs
			${lib_ScreenSaver}
			${lib_IOKit}
			${lib_ApplicationServices}
			${lib_Foundation}
			${lib_Carbon}
		)

	else (APPLE)

		set(XKBlib "X11/XKBlib.h")
		check_include_files("${XKBlib};X11/extensions/dpms.h" HAVE_X11_EXTENSIONS_DPMS_H)
		check_include_files("X11/extensions/Xinerama.h" HAVE_X11_EXTENSIONS_XINERAMA_H)
		check_include_files("${XKBlib};X11/extensions/XKBstr.h" HAVE_X11_EXTENSIONS_XKBSTR_H)
		check_include_files("X11/extensions/XKB.h" HAVE_XKB_EXTENSION)
		check_include_files("X11/extensions/XTest.h" HAVE_X11_EXTENSIONS_XTEST_H)
		check_include_files(${XKBlib} HAVE_X11_XKBLIB_H)

		if (HAVE_X11_EXTENSIONS_DPMS_H)
			# Assume that function prototypes declared, when include exists.
			set(HAVE_DPMS_PROTOTYPES 1)
		endif()

		if (NOT HAVE_X11_XKBLIB_H)
			message(FATAL_ERROR "Missing header: " ${XKBlib})
		endif()

		check_library_exists("SM;ICE" IceConnectionNumber "" HAVE_ICE)
		check_library_exists("X11;Xext" DPMSQueryExtension "" HAVE_Xext)
		check_library_exists("X11;Xext;Xtst" XTestQueryExtension "" HAVE_Xtst)
		check_library_exists("Xinerama" XineramaQueryExtension "" HAVE_Xinerama)

		if (HAVE_ICE)

			# Assume we have SM if we have ICE.
			set(HAVE_SM 1)
			list(APPEND libs SM ICE)

		endif()

		if (HAVE_Xtst)

			# Xtxt depends on X11.
			set(HAVE_X11)
			list(APPEND libs X11 Xtst)

		else (HAVE_Xtst)

			message(FATAL_ERROR "Missing library: Xtst")

		endif()

		if (HAVE_Xext)
			list(APPEND libs Xext)
		endif()

		if (HAVE_Xinerama)
			list(APPEND libs Xinerama)
		else (HAVE_Xinerama)
			if (HAVE_X11_EXTENSIONS_XINERAMA_H)
				message(FATAL_ERROR "Missing library: Xinerama")
			endif()
		endif()

	endif()

	# For config.h, set some static values; it may be a good idea to make
	# these values dynamic for non-standard UNIX compilers.
	set(ACCEPT_TYPE_ARG3 socklen_t)
	set(HAVE_CXX_BOOL 1)
	set(HAVE_CXX_CASTS 1)
	set(HAVE_CXX_EXCEPTIONS 1)
	set(HAVE_CXX_MUTABLE 1)
	set(HAVE_CXX_STDLIB 1)
	set(HAVE_PTHREAD_SIGNAL 1)
	set(SELECT_TYPE_ARG1 int)
	set(SELECT_TYPE_ARG234 "(fd_set *)")
	set(SELECT_TYPE_ARG5 "(struct timeval *)")
	set(STDC_HEADERS 1)
	set(TIME_WITH_SYS_TIME 1)
	set(HAVE_SOCKLEN_T 1)

	# For config.h, save the results based on a template (config.h.in).
	configure_file(${cmake_dir}/config.h.in ${root_dir}/config.h)

	add_definitions(-DSYSAPI_UNIX=1 -DHAVE_CONFIG_H)

	if (APPLE)
		add_definitions(-DWINAPI_CARBON=1 -D_THREAD_SAFE -DMACOSX_DEPLOYMENT_TARGET=10.4)
	else (APPLE)
		add_definitions(-DWINAPI_XWINDOWS=1)
	endif()

else (UNIX)

	list(APPEND libs Wtsapi32 Userenv)

	add_definitions(
		/DWIN32
		/D_WINDOWS
		/D_CRT_SECURE_NO_WARNINGS
		/DVERSION=\"${VERSION}\"
	)

endif()