ETISSCMakeFunctions.cmake

macro(ETISS_LIST_INSERT _list_)
	foreach(_ETISS_MACRO_E ${ARGN})
		list(FIND ${_list_} "${_ETISS_MACRO_E}" _ETISS_MACRO_FOUND)
		if (${_ETISS_MACRO_FOUND} GREATER -1)
		else()
			list(APPEND ${_list_} "${_ETISS_MACRO_E}")
		endif()
	endforeach()
endmacro()

macro(ETISS_GET_GLOBAL_VARS DESTINATION_VARIABLE)
	list(APPEND ${DESTINATION_VARIABLE} "ETISS_FILES_SRC")
	list(APPEND ${DESTINATION_VARIABLE} "ETISS_FILES_LIB")
	list(APPEND ${DESTINATION_VARIABLE} "ETISS_FILES_DLL")
	list(APPEND ${DESTINATION_VARIABLE} "ETISS_FILES_LNK")
	list(APPEND ${DESTINATION_VARIABLE} "ETISS_LIBRARIES")
	list(APPEND ${DESTINATION_VARIABLE} "ETISS_INCLUDE_DIRS")
endmacro()

# copies local variables to the parent scope
macro(ETISS_UPDATE_GLOBAL_VARIABLES)
	ETISS_GET_GLOBAL_VARS(_ETISS_MACRO_GVARS)
	foreach(_ETISS_MACRO_TMP ${_ETISS_MACRO_GVARS})
		set(${_ETISS_MACRO_TMP} ${${_ETISS_MACRO_TMP}} PARENT_SCOPE)
	endforeach()
endmacro()

function(ETISS_TO_MAKEFILE_LIST DESTINATION_VARIABLE)
	unset(${DESTINATION_VARIABLE})
	foreach(arg ${ARGN})
		if (arg MATCHES ".* .*")
			if (arg MATCHES "\".*\"")
				set(${DESTINATION_VARIABLE} "${${DESTINATION_VARIABLE}} ${arg}")
			else()
				set(${DESTINATION_VARIABLE} "${${DESTINATION_VARIABLE}} \"${arg}\"")
			endif()
		else()
			set(${DESTINATION_VARIABLE} "${${DESTINATION_VARIABLE}} ${arg}")
		endif()
	endforeach()
	set(${DESTINATION_VARIABLE} ${${DESTINATION_VARIABLE}} PARENT_SCOPE)
endfunction()

function(ETISS_TO_MAKEFILE_LIBRARIES DESTINATION_VARIABLE)
	unset(${DESTINATION_VARIABLE})
	foreach(arg ${ARGN})
		if (arg MATCHES "-l.*") # already in the right form for a Makefile
			list(APPEND ${DESTINATION_VARIABLE} "${arg}")
		elseif (arg MATCHES "-L.*") # already in the right form for a Makefile
			list(APPEND ${DESTINATION_VARIABLE} "${arg}")
		elseif (arg MATCHES ".*${CMAKE_STATIC_LIBRARY_PREFIX}[^/\\\\]+${CMAKE_STATIC_LIBRARY_SUFFIX}") # static library
			list(APPEND ${DESTINATION_VARIABLE} "${arg}")
		else() # shared library
			get_filename_component(argp "${arg}" PATH)
			if (argp)
				list(APPEND ${DESTINATION_VARIABLE} "-L${argp}")
			endif()
			get_filename_component(argf "${arg}" NAME_WE)
			STRING(REGEX REPLACE "^${CMAKE_SHARED_LIBRARY_PREFIX}" "" argf ${argf})
			list(APPEND ${DESTINATION_VARIABLE} "-l${argf}")
		endif()
	endforeach()
	ETISS_TO_MAKEFILE_LIST(DESTINATION_VARIABLE_TMP ${${DESTINATION_VARIABLE}})
	set(${DESTINATION_VARIABLE} ${DESTINATION_VARIABLE_TMP} PARENT_SCOPE)
endfunction()

#don't call this function! use ETISS(ADD_LIBRARY "yourlibrary") instead
function(ETISS_ADD_LIBRARY)
	set(options OPTIONAL)
  	cmake_parse_arguments(TMP "${options}" "" "" ${ARGN} )
	foreach(arg ${TMP_UNPARSED_ARGUMENTS})
		if (arg MATCHES "^-l.*")
			message("Trimmed library name from ${arg} ...")
			string(SUBSTRING ${arg} 2 -1 arg)
			message("	... to ${arg}")
		endif()
		unset(FOUND)
		find_library(FOUND ${arg})
		if (ETISS_ADD_LIBARY_OPTIONAL)
			if (NOT FOUND)
				message(INFO "Library ${arg} could not be found. The optinal library will not be added.")
			else()
				ETISS_LIST_INSERT(ETISS_FILES_LNK	${arg})
				ETISS_LIST_INSERT(ETISS_LIBRARIES	${arg})
				#list(APPEND ETISS_FILES_LNK	${arg})				
				#list(APPEND ETISS_LIBRARIES	${arg})
			endif()
		else()
			if (NOT FOUND)
				message(ERROR "Library ${arg} could not be found. This may lead to problems.")
			endif()
			ETISS_LIST_INSERT(ETISS_FILES_LNK	${arg})
			ETISS_LIST_INSERT(ETISS_LIBRARIES	${arg})
		endif()
	endforeach()
	ETISS_UPDATE_GLOBAL_VARIABLES()
endfunction()

#NOTE: automatically copies global etiss variables to the parent scope if needed
macro(ETISS CURRENT_COMMAND)
		
		if ("${CURRENT_COMMAND}" STREQUAL "ADD_LIBRARY")
			ETISS_ADD_LIBRARY(${ARGN})
		else()
			message(FATAL_ERROR "Unknown command passed to the ETISS function: " ${CURRENT_COMMAND})
		endif()
		
		get_directory_property(_ETISS_MACRO_hasParent PARENT_DIRECTORY)
		if(_ETISS_MACRO_hasParent)
  			ETISS_UPDATE_GLOBAL_VARIABLES()
		endif()
endmacro()