# check if compiling into source directories
STRING(COMPARE EQUAL "${CMAKE_SOURCE_DIR}" "${CMAKE_BINARY_DIR}" insource)
if(insource)
    MESSAGE(FATAL_ERROR "${PROJECT_NAME} requires an out of source build. Goto ./Build and tapes cmake ../")
endif(insource)

project(Addons_ckernelapi_scalfmm CXX C)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${ScaLFMM_CXX_FLAGS}")

# Active language
# -----------------------
ENABLE_LANGUAGE(CXX C)
MESSAGE(STATUS " CXX  ${CMAKE_CXX_COMPILER_ID}" )

# Options
OPTION( SCALFMM_ADDON_CKERNELAPI "Set to ON to build ScaFMM FMM API interface" OFF )

# if ask to build addon
if(SCALFMM_ADDON_CKERNELAPI)
	# first build lib scalfmmckernelapi
	set(LIBRARY_OUTPUT_PATH ../lib/${CMAKE_BUILD_TYPE})

	# Searching all cpp file
	file( GLOB_RECURSE source_lib_files Src/*.cpp )

	# Adding cpp files to project
	add_library( scalfmmckernelapi STATIC ${source_lib_files} )

	# Add blas library (even if it is set to off)
	target_link_libraries( scalfmmckernelapi scalfmm)

	# Adding the entire project dir as an include dir
	INCLUDE_DIRECTORIES(
         ${CMAKE_BINARY_DIR}/Src 
         ${CMAKE_SOURCE_DIR}/Src   
         ${SCALFMM_INCLUDES}
    )

	# Install lib
	install( TARGETS scalfmmckernelapi ARCHIVE DESTINATION lib )

	# Install header
	SET(my_include_dirs "Src")
	
	file( GLOB hpp_in_dir Src/*.hpp )
	INSTALL( FILES ${hpp_in_dir} DESTINATION include/ScalFmm/CKernelApi )

	file( GLOB_RECURSE source_tests_files Tests/*.c )
	INCLUDE_DIRECTORIES( ${CMAKE_BINARY_DIR}/Src )

	# Then build test files
	foreach(exec ${source_tests_files}) 
		get_filename_component(
			execname ${exec}
			NAME_WE
		)

	    set(compile_exec "TRUE")
	
	    foreach(fuse_key ${FUSE_LIST})
	        file(STRINGS "${exec}" lines_fuse REGEX "@FUSE_${fuse_key}")
	        if(lines_fuse)
		        if( NOT ScalFMM_USE_${fuse_key} )
			        MESSAGE( STATUS "This needs ${fuse_key} = ${exec}" )
			        set(compile_exec "FALSE")
		        endif()
	        endif()
	    endforeach()

		# Dependency are OK
		if( compile_exec )
			add_executable(	${execname} ${exec} )
			# link to scalfmm and scalfmmckernelapi
			target_link_libraries(
				${execname}
				${scalfmm_lib}
				scalfmmckernelapi
				# ${BLAS_LIBRARIES}
				# ${LAPACK_LIBRARIES}
			    ${SCALFMM_LIBRARIES}
				)
		endif()
	endforeach(exec)
endif()