barrier/cmake/CMakeLists_config.txt

# 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(HAVE_INET_ATON_ADV)

	ENDIF(NOT HAVE_INET_ATON)

	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(HAVE_PTHREAD)
	
	IF(APPLE)

		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(HAVE_X11_EXTENSIONS_DPMS_H)

		IF(NOT HAVE_X11_XKBLIB_H)
			MESSAGE(FATAL_ERROR "Missing header: " ${XKBlib})
		ENDIF(NOT HAVE_X11_XKBLIB_H)

		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(HAVE_ICE)

		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(HAVE_Xtst)

		IF(HAVE_Xext)
			LIST(APPEND libs Xext)
		ENDIF(HAVE_Xext)

		IF(HAVE_Xinerama)
			LIST(APPEND libs Xinerama)
		ELSE(HAVE_Xinerama)
			IF(HAVE_X11_EXTENSIONS_XINERAMA_H)
			MESSAGE(FATAL_ERROR "Missing library: Xinerama")
			ENDIF(HAVE_X11_EXTENSIONS_XINERAMA_H)
		ENDIF(HAVE_Xinerama)

	ENDIF(APPLE)

	# 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)
	ELSE(APPLE)
		ADD_DEFINITIONS(-DWINAPI_XWINDOWS=1)
	ENDIF(APPLE)

ELSE(UNIX)

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

ENDIF(UNIX)