include/freeDiameter/CMakeLists.txt - freeDiameter-old - Gitiles

 #CMake configuration for freeDiameter include directory

 Project("freeDiameter includes directory" C)

 ########################
 # Configurable parameters

 # Disable SCTP support completely ?
 OPTION(DISABLE_SCTP "Disable SCTP support?" OFF)
 IF (NOT DISABLE_SCTP)
 	OPTION(DEBUG_SCTP "Verbose SCTP (for debug)?" OFF)
 	OPTION(SCTP_USE_MAPPED_ADDRESSES "Use v6-mapped v4 addresses in SCTP (workaround some SCTP limitations)?" OFF)
 ENDIF (NOT DISABLE_SCTP)

 # Find TODO items in the code easily ?
 OPTION(ERRORS_ON_TODO "(development) Generate compilation errors on TODO items ?" OFF)

 # In DEBUG mode, each log can contain pid, calling function and file for easy debug. Set to ON to display this information.
 OPTION(DEBUG_WITH_META "Show calling location in logs?" OFF)

 # Create the absolute path for searching extensions
 SET(DEFAULT_EXTENSIONS_PATH ${CMAKE_INSTALL_PREFIX}/${INSTALL_EXTENSIONS_SUFFIX})

 # IDNA considerations
 OPTION(DIAMID_IDNA_IGNORE "Ignore completely invalid characters in Diameter Identities (process blindly)?" OFF)
 IF (NOT DIAMID_IDNA_IGNORE)
 	OPTION (DIAMID_IDNA_REJECT "Reject internationalized Diameter Identities, do not attempt to convert it (stringprep) ?" OFF)
 ENDIF (NOT DIAMID_IDNA_IGNORE)

 # Disable expiration of connections with dynamically connected peers as per RFC 3539 ? (default is enabled)
 # Note: if someone needs, we could also make the delay configurable here...
 OPTION(DISABLE_PEER_EXPIRY "Disable RFC3539 Peers Connections Expiration after inactivity?" OFF)

 # The following workaround increases compatibility with some implementations without breaking anything in freeDiameter,
 # so it can be enabled without risk. We keep it disabled by default anyway for those people who use freeDiameter to check the
 # compliancy of their implementation with the Diameter RFC...
 OPTION(WORKAROUND_ACCEPT_INVALID_VSAI "Do not reject a CER/CEA with a Vendor-Specific-Application-Id AVP containing both Auth- and Acct- application AVPs?" OFF)

 MARK_AS_ADVANCED(DISABLE_SCTP DEBUG_SCTP SCTP_USE_MAPPED_ADDRESSES ERRORS_ON_TODO DEBUG_WITH_META DIAMID_IDNA_IGNORE DIAMID_IDNA_REJECT DISABLE_PEER_EXPIRY WORKAROUND_ACCEPT_INVALID_VSAI)

 ########################
 ### System checks part

 INCLUDE (CheckLibraryExists)
 INCLUDE (CheckFunctionExists)
 INCLUDE (CheckIncludeFiles)
 INCLUDE (CheckSymbolExists)
 INCLUDE (CheckCSourceCompiles)
 INCLUDE (TestBigEndian)


 ### System checks -- mandatory support

 # We need the getopt_long function
 CHECK_FUNCTION_EXISTS (getopt_long HAVE_LONG_OPTIONS)
 IF (NOT HAVE_LONG_OPTIONS)
    MESSAGE(SEND_ERROR "The getopt_long function is not found, please add needed library in build system")
 ENDIF (NOT HAVE_LONG_OPTIONS)

 # getifaddrs ?
 CHECK_FUNCTION_EXISTS (getifaddrs HAVE_GETIFADDRS)
 IF (NOT HAVE_GETIFADDRS)
    MESSAGE(SEND_ERROR "The getifaddrs function is currently required by freeDiameter.")
 ENDIF (NOT HAVE_GETIFADDRS)


 ### System checks -- for freeDiameter-host.h

 # Check byte ordering
 TEST_BIG_ENDIAN(HOST_BIG_ENDIAN)

 # Check if ntohll is provided on the system
 CHECK_SYMBOL_EXISTS(ntohll netinet/in.h HAVE_NTOHLL)

 # malloc.h ?
 CHECK_INCLUDE_FILES (malloc.h HAVE_MALLOC_H)

 # strndup ? Missing on OS X
 CHECK_FUNCTION_EXISTS (strndup HAVE_STRNDUP)


 ### System checks -- for includes / link

 # pthreads
 INCLUDE(FindThreads)
 SET(CMAKE_THREAD_LIBS_INIT ${CMAKE_THREAD_LIBS_INIT} PARENT_SCOPE)

 # clock_gettime
 SET(HAVE_CLOCK_GETTIME "")
 CHECK_FUNCTION_EXISTS (clock_gettime HAVE_NATIVE_CLOCK_GETTIME)
 IF (HAVE_NATIVE_CLOCK_GETTIME)
    SET(CLOCK_GETTIME_LIBS "")
    SET(HAVE_CLOCK_GETTIME 1)
 ELSE (HAVE_NATIVE_CLOCK_GETTIME)
    CHECK_LIBRARY_EXISTS (rt clock_gettime "" HAVE_LIBRT)
    IF (HAVE_LIBRT)
      SET(CLOCK_GETTIME_LIBS "-lrt")
      SET(HAVE_CLOCK_GETTIME 1)
    ELSE (HAVE_LIBRT)
      CHECK_LIBRARY_EXISTS (posix4 clock_gettime "" HAVE_LIBPOSIX4)
      IF (HAVE_LIBPOSIX4)
        SET(CLOCK_GETTIME_LIBS "-lposix4")
        SET(HAVE_CLOCK_GETTIME 1)
      ENDIF (HAVE_LIBPOSIX4)
    ENDIF (HAVE_LIBRT)
 ENDIF (HAVE_NATIVE_CLOCK_GETTIME)
 SET(CLOCK_GETTIME_LIBS ${CLOCK_GETTIME_LIBS} PARENT_SCOPE)

 # dlopen and dlclose: CMAKE_DL_LIBS

 # We need the sctp_connectx function among others
 # We need the IPPROTO_SCTP symbol from sys/socket.h, netinet/in.h or netinet/sctp.h
 IF(NOT DISABLE_SCTP)
 	CHECK_FUNCTION_EXISTS(sctp_connectx HAVE_NATIVE_SCTP)
 	IF(NOT HAVE_NATIVE_SCTP)
 		FIND_PACKAGE(SCTP REQUIRED)
 	ENDIF(NOT HAVE_NATIVE_SCTP)
 	# Now check the number of args of this function, since it changed between Ubuntu 9.04 and 9.10
    	SET(CHECK_SCTP_CONNECTX_4_ARGS_SOURCE_CODE "
 		#include <unistd.h>
 		#include <netinet/sctp.h>
 		int main() {
 		   return sctp_connectx(0, NULL, 0, NULL);
 		}
 		")
 	SET(CMAKE_REQUIRED_INCLUDES ${SCTP_INCLUDE_DIR})
 	SET(CMAKE_REQUIRED_LIBRARIES ${SCTP_LIBRARIES})
 	CHECK_C_SOURCE_COMPILES("${CHECK_SCTP_CONNECTX_4_ARGS_SOURCE_CODE}" SCTP_CONNECTX_4_ARGS)
 ELSE (NOT DISABLE_SCTP)
 	MESSAGE(STATUS "Disabled SCTP support.")
 ENDIF(NOT DISABLE_SCTP)
 SET(SCTP_INCLUDE_DIR ${SCTP_INCLUDE_DIR} PARENT_SCOPE)
 SET(SCTP_LIBRARIES ${SCTP_LIBRARIES} PARENT_SCOPE)

 # IDNA process: we use libidn from GNU (unless the function & header files are included in libc)
 IF(NOT DIAMID_IDNA_IGNORE  AND NOT DIAMID_IDNA_REJECT)
 	FIND_PACKAGE(IDNA)
    	SET(CHECK_IDNA_SOURCE_CODE "
 		#include <idna.h>
 		int main() {
 		   return idna_to_ascii_8z(NULL, NULL, 0);
 		}
 		")
 	SET(CMAKE_REQUIRED_INCLUDES ${IDNA_INCLUDE_DIR})
 	SET(CMAKE_REQUIRED_LIBRARIES ${IDNA_LIBRARIES})
 	CHECK_C_SOURCE_COMPILES("${CHECK_IDNA_SOURCE_CODE}" HAS_IDNA_SUPPORT)
 	IF(NOT HAS_IDNA_SUPPORT)
 		MESSAGE(SEND_ERROR "Unable to find idna.h header or idna_to_ascii_8z function, please install libidn-dev or equivalent, or set DIAMID_IDNA_IGNORE or DIAMID_IDNA_REJECT")
 	ENDIF(NOT HAS_IDNA_SUPPORT)
 ELSE (NOT DIAMID_IDNA_IGNORE  AND NOT DIAMID_IDNA_REJECT)
 	MESSAGE(STATUS "Non-default Internationalized Domain Names (IDN) behavior selected (no stringprep).")
 ENDIF(NOT DIAMID_IDNA_IGNORE  AND NOT DIAMID_IDNA_REJECT)
 SET(IDNA_INCLUDE_DIR ${IDNA_INCLUDE_DIR} PARENT_SCOPE)
 SET(IDNA_LIBRARIES ${IDNA_LIBRARIES} PARENT_SCOPE)


 # Require GNU TLS for building the library
 FIND_PACKAGE(GnuTLS REQUIRED)
 SET(GNUTLS_INCLUDE_DIR ${GNUTLS_INCLUDE_DIR} PARENT_SCOPE)
 SET(GNUTLS_LIBRARIES ${GNUTLS_LIBRARIES} PARENT_SCOPE)

 find_path(GCRYPT_INCLUDE_DIR NAMES gcrypt.h)
 If ( NOT GCRYPT_INCLUDE_DIR )
 	MESSAGE(SEND_ERROR "Unable to find gcrypt.h, please install libgcrypt-dev or equivalent")
 Endif ( NOT GCRYPT_INCLUDE_DIR )
 MARK_AS_ADVANCED(GCRYPT_INCLUDE_DIR)
 SET(GCRYPT_INCLUDE_DIR ${GCRYPT_INCLUDE_DIR} PARENT_SCOPE)

 # Also we need libgcrypt to... display its version :(
 find_library(GCRYPT_LIBRARY
   NAMES gcrypt
 )
 If ( NOT GCRYPT_LIBRARY )
 	MESSAGE(SEND_ERROR "Unable to find libgcrypt, please install libgcrypt or equivalent")
 Endif ( NOT GCRYPT_LIBRARY )
 SET(GCRYPT_LIBRARY ${GCRYPT_LIBRARY} PARENT_SCOPE)


 # Check if AI_ADDRCONFIG is available on the system
 CHECK_SYMBOL_EXISTS(AI_ADDRCONFIG "netdb.h" HAVE_AI_ADDRCONFIG)


 # Check if barriers are available (for test_fifo)
 SET(CMAKE_REQUIRED_INCLUDES "pthread.h")
 SET(CMAKE_REQUIRED_LIBRARIES ${CMAKE_THREAD_LIBS_INIT})
 CHECK_FUNCTION_EXISTS (pthread_barrier_wait HAVE_PTHREAD_BAR)
 SET(HAVE_PTHREAD_BAR ${HAVE_PTHREAD_BAR} PARENT_SCOPE)


 ##########################

 # Additional hg version when relevant, stored in version.h
 if (EXISTS "${CMAKE_SOURCE_DIR}/.hg")
 	# Search for hg binary to use
 	FIND_PROGRAM(HGCOMMAND hg)
 	if (HGCOMMAND)
 		# Ok, add the custom target so that hg is executed at every build
 		ADD_CUSTOM_TARGET(version_information
 				   COMMAND ${CMAKE_COMMAND} -D HGCOMMAND="${HGCOMMAND}" -D SRC="${CMAKE_CURRENT_SOURCE_DIR}/version.h.in" -D DST="${CMAKE_CURRENT_BINARY_DIR}/version.h" -P "${CMAKE_SOURCE_DIR}/cmake/Modules/GetVersionWithHg.cmake"
 				   DEPENDS "${CMAKE_SOURCE_DIR}/.hg/dirstate"
 				   WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
 				   COMMENT "Retrieving version of the hg repository"
 				   )
 	else (HGCOMMAND)
 		# Display at least "unknown" rev in this case
 		SET(FD_PROJECT_VERSION_HG "unknown")
 		CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/version.h.in ${CMAKE_CURRENT_BINARY_DIR}/version.h)
 		ADD_CUSTOM_TARGET(version_information DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/version.h)
 	endif(HGCOMMAND)
 else (EXISTS "${CMAKE_SOURCE_DIR}/.hg")
 	# We use the pure version number without extension
 	CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/version.h.in ${CMAKE_CURRENT_BINARY_DIR}/version.h)
 	ADD_CUSTOM_TARGET(version_information DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/version.h)
 endif (EXISTS "${CMAKE_SOURCE_DIR}/.hg")


 ##########################

 # LFDPROTO_LIBS = libraries required by the libfdproto.
 SET(LFDPROTO_LIBS ${CLOCK_GETTIME_LIBS} ${CMAKE_THREAD_LIBS_INIT} ${IDNA_LIBRARIES} PARENT_SCOPE)
 # And includes paths
 SET(LFDPROTO_INCLUDES ${IDNA_INCLUDE_DIR} PARENT_SCOPE)
 # Dependencies: the libraries required by any code linking to libfdproto.
 SET(LFDPROTO_LINK_INTERFACES ${CMAKE_THREAD_LIBS_INIT} PARENT_SCOPE)

 # LFDCORE_LIBS = libraries required by the libfdcore (in addition to libfdproto and its dependencies)
 SET(LFDCORE_LIBS ${CLOCK_GETTIME_LIBS} ${CMAKE_DL_LIBS} ${SCTP_LIBRARIES} ${GCRYPT_LIBRARY} ${GNUTLS_LIBRARIES} PARENT_SCOPE)
 # And includes paths
 SET(LFDCORE_INCLUDES ${SCTP_INCLUDE_DIR} ${GNUTLS_INCLUDE_DIR} ${GCRYPT_INCLUDE_DIR} PARENT_SCOPE)
 # And dependencies
 SET(LFDCORE_LINK_INTERFACES "" PARENT_SCOPE)
 		# We don't force other libraries, the programs will link with what it needs
                 # (such as libgnutls if it uses GNUTLS_DEBUG() macro
 		# or libfdproto if it uses some of its interfaces directly)
 		# See freeDiameterd/CMakeLists.txt for an example.

 ##########################

 # Generate the host.h file
 CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/freeDiameter-host.h.in ${CMAKE_CURRENT_BINARY_DIR}/freeDiameter-host.h)

 ####
 ## INSTALL section ##

 # The headers from this directory are required to develop new extensions for freeDiameter.
 INSTALL(FILES ${CMAKE_CURRENT_BINARY_DIR}/freeDiameter-host.h libfdproto.h libfdcore.h extension.h
 	DESTINATION ${INSTALL_HEADERS_SUFFIX}
 	COMPONENT freeDiameter-dev)
	#CMake configuration for freeDiameter include directory

	Project("freeDiameter includes directory" C)

	########################
	# Configurable parameters

	# Disable SCTP support completely ?
	OPTION(DISABLE_SCTP "Disable SCTP support?" OFF)
	IF (NOT DISABLE_SCTP)
	OPTION(DEBUG_SCTP "Verbose SCTP (for debug)?" OFF)
	OPTION(SCTP_USE_MAPPED_ADDRESSES "Use v6-mapped v4 addresses in SCTP (workaround some SCTP limitations)?" OFF)
	ENDIF (NOT DISABLE_SCTP)

	# Find TODO items in the code easily ?
	OPTION(ERRORS_ON_TODO "(development) Generate compilation errors on TODO items ?" OFF)

	# In DEBUG mode, each log can contain pid, calling function and file for easy debug. Set to ON to display this information.
	OPTION(DEBUG_WITH_META "Show calling location in logs?" OFF)

	# Create the absolute path for searching extensions
	SET(DEFAULT_EXTENSIONS_PATH ${CMAKE_INSTALL_PREFIX}/${INSTALL_EXTENSIONS_SUFFIX})

	# IDNA considerations
	OPTION(DIAMID_IDNA_IGNORE "Ignore completely invalid characters in Diameter Identities (process blindly)?" OFF)
	IF (NOT DIAMID_IDNA_IGNORE)
	OPTION (DIAMID_IDNA_REJECT "Reject internationalized Diameter Identities, do not attempt to convert it (stringprep) ?" OFF)
	ENDIF (NOT DIAMID_IDNA_IGNORE)

	# Disable expiration of connections with dynamically connected peers as per RFC 3539 ? (default is enabled)
	# Note: if someone needs, we could also make the delay configurable here...
	OPTION(DISABLE_PEER_EXPIRY "Disable RFC3539 Peers Connections Expiration after inactivity?" OFF)

	# The following workaround increases compatibility with some implementations without breaking anything in freeDiameter,
	# so it can be enabled without risk. We keep it disabled by default anyway for those people who use freeDiameter to check the
	# compliancy of their implementation with the Diameter RFC...
	OPTION(WORKAROUND_ACCEPT_INVALID_VSAI "Do not reject a CER/CEA with a Vendor-Specific-Application-Id AVP containing both Auth- and Acct- application AVPs?" OFF)

	MARK_AS_ADVANCED(DISABLE_SCTP DEBUG_SCTP SCTP_USE_MAPPED_ADDRESSES ERRORS_ON_TODO DEBUG_WITH_META DIAMID_IDNA_IGNORE DIAMID_IDNA_REJECT DISABLE_PEER_EXPIRY WORKAROUND_ACCEPT_INVALID_VSAI)

	########################
	### System checks part

	INCLUDE (CheckLibraryExists)
	INCLUDE (CheckFunctionExists)
	INCLUDE (CheckIncludeFiles)
	INCLUDE (CheckSymbolExists)
	INCLUDE (CheckCSourceCompiles)
	INCLUDE (TestBigEndian)


	### System checks -- mandatory support

	# We need the getopt_long function
	CHECK_FUNCTION_EXISTS (getopt_long HAVE_LONG_OPTIONS)
	IF (NOT HAVE_LONG_OPTIONS)
	MESSAGE(SEND_ERROR "The getopt_long function is not found, please add needed library in build system")
	ENDIF (NOT HAVE_LONG_OPTIONS)

	# getifaddrs ?
	CHECK_FUNCTION_EXISTS (getifaddrs HAVE_GETIFADDRS)
	IF (NOT HAVE_GETIFADDRS)
	MESSAGE(SEND_ERROR "The getifaddrs function is currently required by freeDiameter.")
	ENDIF (NOT HAVE_GETIFADDRS)


	### System checks -- for freeDiameter-host.h

	# Check byte ordering
	TEST_BIG_ENDIAN(HOST_BIG_ENDIAN)

	# Check if ntohll is provided on the system
	CHECK_SYMBOL_EXISTS(ntohll netinet/in.h HAVE_NTOHLL)

	# malloc.h ?
	CHECK_INCLUDE_FILES (malloc.h HAVE_MALLOC_H)

	# strndup ? Missing on OS X
	CHECK_FUNCTION_EXISTS (strndup HAVE_STRNDUP)


	### System checks -- for includes / link

	# pthreads
	INCLUDE(FindThreads)
	SET(CMAKE_THREAD_LIBS_INIT ${CMAKE_THREAD_LIBS_INIT} PARENT_SCOPE)

	# clock_gettime
	SET(HAVE_CLOCK_GETTIME "")
	CHECK_FUNCTION_EXISTS (clock_gettime HAVE_NATIVE_CLOCK_GETTIME)
	IF (HAVE_NATIVE_CLOCK_GETTIME)
	SET(CLOCK_GETTIME_LIBS "")
	SET(HAVE_CLOCK_GETTIME 1)
	ELSE (HAVE_NATIVE_CLOCK_GETTIME)
	CHECK_LIBRARY_EXISTS (rt clock_gettime "" HAVE_LIBRT)
	IF (HAVE_LIBRT)
	SET(CLOCK_GETTIME_LIBS "-lrt")
	SET(HAVE_CLOCK_GETTIME 1)
	ELSE (HAVE_LIBRT)
	CHECK_LIBRARY_EXISTS (posix4 clock_gettime "" HAVE_LIBPOSIX4)
	IF (HAVE_LIBPOSIX4)
	SET(CLOCK_GETTIME_LIBS "-lposix4")
	SET(HAVE_CLOCK_GETTIME 1)
	ENDIF (HAVE_LIBPOSIX4)
	ENDIF (HAVE_LIBRT)
	ENDIF (HAVE_NATIVE_CLOCK_GETTIME)
	SET(CLOCK_GETTIME_LIBS ${CLOCK_GETTIME_LIBS} PARENT_SCOPE)

	# dlopen and dlclose: CMAKE_DL_LIBS

	# We need the sctp_connectx function among others
	# We need the IPPROTO_SCTP symbol from sys/socket.h, netinet/in.h or netinet/sctp.h
	IF(NOT DISABLE_SCTP)
	CHECK_FUNCTION_EXISTS(sctp_connectx HAVE_NATIVE_SCTP)
	IF(NOT HAVE_NATIVE_SCTP)
	FIND_PACKAGE(SCTP REQUIRED)
	ENDIF(NOT HAVE_NATIVE_SCTP)
	# Now check the number of args of this function, since it changed between Ubuntu 9.04 and 9.10
	SET(CHECK_SCTP_CONNECTX_4_ARGS_SOURCE_CODE "
	#include <unistd.h>
	#include <netinet/sctp.h>
	int main() {
	return sctp_connectx(0, NULL, 0, NULL);
	}
	")
	SET(CMAKE_REQUIRED_INCLUDES ${SCTP_INCLUDE_DIR})
	SET(CMAKE_REQUIRED_LIBRARIES ${SCTP_LIBRARIES})
	CHECK_C_SOURCE_COMPILES("${CHECK_SCTP_CONNECTX_4_ARGS_SOURCE_CODE}" SCTP_CONNECTX_4_ARGS)
	ELSE (NOT DISABLE_SCTP)
	MESSAGE(STATUS "Disabled SCTP support.")
	ENDIF(NOT DISABLE_SCTP)
	SET(SCTP_INCLUDE_DIR ${SCTP_INCLUDE_DIR} PARENT_SCOPE)
	SET(SCTP_LIBRARIES ${SCTP_LIBRARIES} PARENT_SCOPE)

	# IDNA process: we use libidn from GNU (unless the function & header files are included in libc)
	IF(NOT DIAMID_IDNA_IGNORE AND NOT DIAMID_IDNA_REJECT)
	FIND_PACKAGE(IDNA)
	SET(CHECK_IDNA_SOURCE_CODE "
	#include <idna.h>
	int main() {
	return idna_to_ascii_8z(NULL, NULL, 0);
	}
	")
	SET(CMAKE_REQUIRED_INCLUDES ${IDNA_INCLUDE_DIR})
	SET(CMAKE_REQUIRED_LIBRARIES ${IDNA_LIBRARIES})
	CHECK_C_SOURCE_COMPILES("${CHECK_IDNA_SOURCE_CODE}" HAS_IDNA_SUPPORT)
	IF(NOT HAS_IDNA_SUPPORT)
	MESSAGE(SEND_ERROR "Unable to find idna.h header or idna_to_ascii_8z function, please install libidn-dev or equivalent, or set DIAMID_IDNA_IGNORE or DIAMID_IDNA_REJECT")
	ENDIF(NOT HAS_IDNA_SUPPORT)
	ELSE (NOT DIAMID_IDNA_IGNORE AND NOT DIAMID_IDNA_REJECT)
	MESSAGE(STATUS "Non-default Internationalized Domain Names (IDN) behavior selected (no stringprep).")
	ENDIF(NOT DIAMID_IDNA_IGNORE AND NOT DIAMID_IDNA_REJECT)
	SET(IDNA_INCLUDE_DIR ${IDNA_INCLUDE_DIR} PARENT_SCOPE)
	SET(IDNA_LIBRARIES ${IDNA_LIBRARIES} PARENT_SCOPE)


	# Require GNU TLS for building the library
	FIND_PACKAGE(GnuTLS REQUIRED)
	SET(GNUTLS_INCLUDE_DIR ${GNUTLS_INCLUDE_DIR} PARENT_SCOPE)
	SET(GNUTLS_LIBRARIES ${GNUTLS_LIBRARIES} PARENT_SCOPE)

	find_path(GCRYPT_INCLUDE_DIR NAMES gcrypt.h)
	If ( NOT GCRYPT_INCLUDE_DIR )
	MESSAGE(SEND_ERROR "Unable to find gcrypt.h, please install libgcrypt-dev or equivalent")
	Endif ( NOT GCRYPT_INCLUDE_DIR )
	MARK_AS_ADVANCED(GCRYPT_INCLUDE_DIR)
	SET(GCRYPT_INCLUDE_DIR ${GCRYPT_INCLUDE_DIR} PARENT_SCOPE)

	# Also we need libgcrypt to... display its version :(
	find_library(GCRYPT_LIBRARY
	NAMES gcrypt
	)
	If ( NOT GCRYPT_LIBRARY )
	MESSAGE(SEND_ERROR "Unable to find libgcrypt, please install libgcrypt or equivalent")
	Endif ( NOT GCRYPT_LIBRARY )
	SET(GCRYPT_LIBRARY ${GCRYPT_LIBRARY} PARENT_SCOPE)


	# Check if AI_ADDRCONFIG is available on the system
	CHECK_SYMBOL_EXISTS(AI_ADDRCONFIG "netdb.h" HAVE_AI_ADDRCONFIG)


	# Check if barriers are available (for test_fifo)
	SET(CMAKE_REQUIRED_INCLUDES "pthread.h")
	SET(CMAKE_REQUIRED_LIBRARIES ${CMAKE_THREAD_LIBS_INIT})
	CHECK_FUNCTION_EXISTS (pthread_barrier_wait HAVE_PTHREAD_BAR)
	SET(HAVE_PTHREAD_BAR ${HAVE_PTHREAD_BAR} PARENT_SCOPE)


	##########################

	# Additional hg version when relevant, stored in version.h
	if (EXISTS "${CMAKE_SOURCE_DIR}/.hg")
	# Search for hg binary to use
	FIND_PROGRAM(HGCOMMAND hg)
	if (HGCOMMAND)
	# Ok, add the custom target so that hg is executed at every build
	ADD_CUSTOM_TARGET(version_information
	COMMAND ${CMAKE_COMMAND} -D HGCOMMAND="${HGCOMMAND}" -D SRC="${CMAKE_CURRENT_SOURCE_DIR}/version.h.in" -D DST="${CMAKE_CURRENT_BINARY_DIR}/version.h" -P "${CMAKE_SOURCE_DIR}/cmake/Modules/GetVersionWithHg.cmake"
	DEPENDS "${CMAKE_SOURCE_DIR}/.hg/dirstate"
	WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
	COMMENT "Retrieving version of the hg repository"
	)
	else (HGCOMMAND)
	# Display at least "unknown" rev in this case
	SET(FD_PROJECT_VERSION_HG "unknown")
	CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/version.h.in ${CMAKE_CURRENT_BINARY_DIR}/version.h)
	ADD_CUSTOM_TARGET(version_information DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/version.h)
	endif(HGCOMMAND)
	else (EXISTS "${CMAKE_SOURCE_DIR}/.hg")
	# We use the pure version number without extension
	CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/version.h.in ${CMAKE_CURRENT_BINARY_DIR}/version.h)
	ADD_CUSTOM_TARGET(version_information DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/version.h)
	endif (EXISTS "${CMAKE_SOURCE_DIR}/.hg")


	##########################

	# LFDPROTO_LIBS = libraries required by the libfdproto.
	SET(LFDPROTO_LIBS ${CLOCK_GETTIME_LIBS} ${CMAKE_THREAD_LIBS_INIT} ${IDNA_LIBRARIES} PARENT_SCOPE)
	# And includes paths
	SET(LFDPROTO_INCLUDES ${IDNA_INCLUDE_DIR} PARENT_SCOPE)
	# Dependencies: the libraries required by any code linking to libfdproto.
	SET(LFDPROTO_LINK_INTERFACES ${CMAKE_THREAD_LIBS_INIT} PARENT_SCOPE)

	# LFDCORE_LIBS = libraries required by the libfdcore (in addition to libfdproto and its dependencies)
	SET(LFDCORE_LIBS ${CLOCK_GETTIME_LIBS} ${CMAKE_DL_LIBS} ${SCTP_LIBRARIES} ${GCRYPT_LIBRARY} ${GNUTLS_LIBRARIES} PARENT_SCOPE)
	# And includes paths
	SET(LFDCORE_INCLUDES ${SCTP_INCLUDE_DIR} ${GNUTLS_INCLUDE_DIR} ${GCRYPT_INCLUDE_DIR} PARENT_SCOPE)
	# And dependencies
	SET(LFDCORE_LINK_INTERFACES "" PARENT_SCOPE)
	# We don't force other libraries, the programs will link with what it needs
	# (such as libgnutls if it uses GNUTLS_DEBUG() macro
	# or libfdproto if it uses some of its interfaces directly)
	# See freeDiameterd/CMakeLists.txt for an example.

	##########################

	# Generate the host.h file
	CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/freeDiameter-host.h.in ${CMAKE_CURRENT_BINARY_DIR}/freeDiameter-host.h)

	####
	## INSTALL section ##

	# The headers from this directory are required to develop new extensions for freeDiameter.
	INSTALL(FILES ${CMAKE_CURRENT_BINARY_DIR}/freeDiameter-host.h libfdproto.h libfdcore.h extension.h
	DESTINATION ${INSTALL_HEADERS_SUFFIX}
	COMPONENT freeDiameter-dev)