cmake_minimum_required(VERSION 3.0)

project(eismultiplexer)

find_package(PkgConfig REQUIRED)
find_package(Doxygen)
pkg_check_modules(LIBUSB REQUIRED libusb-1.0)

if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
	set(CMAKE_INSTALL_PREFIX "/usr" CACHE PATH "..." FORCE)
endif(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)

set(SRC_FILES eismultiplexer.c usbshm.c)
add_library(${PROJECT_NAME} SHARED ${SRC_FILES})
target_link_libraries(${PROJECT_NAME} ${LIBUSB_LIBRARIES})
target_include_directories(${PROJECT_NAME} PUBLIC ${LIBUSB_INCLUDE_DIRS})
add_definitions("-std=c17 -Wall -O2 -fno-strict-aliasing")
install(TARGETS ${PROJECT_NAME} DESTINATION lib)
install(FILES ./eismultiplexer.h DESTINATION include)

link_directories(${CMAKE_CURRENT_BINARY_DIR})
add_executable(${PROJECT_NAME}_cli main.c)
add_dependencies(${PROJECT_NAME}_cli ${PROJECT_NAME})
target_link_libraries( ${PROJECT_NAME}_cli ${PROJECT_NAME})
add_definitions("-std=c17 -Wall -O2 -fno-strict-aliasing")
install(TARGETS ${PROJECT_NAME}_cli DESTINATION bin)

configure_file(pkgconfig/eismuliplexer.pc.in pkgconfig/eismuliplexer.pc @ONLY)
install(FILES ${CMAKE_CURRENT_BINARY_DIR}/pkgconfig/eismuliplexer.pc DESTINATION lib/pkgconfig)

if (DOXYGEN_FOUND)
	set(DOXYGEN_IN ${CMAKE_CURRENT_SOURCE_DIR}/doc/libeismulitplexer.doxygen.in)
	set(DOXYGEN_OUT ${CMAKE_CURRENT_BINARY_DIR}/doc/libeismulitplexer.doxygen)
	configure_file(${DOXYGEN_IN} ${DOXYGEN_OUT} @ONLY)
	message("Doxygen build started")

	add_custom_target(doc
		COMMAND ${DOXYGEN_EXECUTABLE} ${DOXYGEN_OUT}
		WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
		COMMENT "Generating API documentation with Doxygen"
		VERBATIM )
else (DOXYGEN_FOUND)
  message("Doxygen needs to be installed to generate the doxygen documentation")
endif (DOXYGEN_FOUND)

if(CMAKE_SYSTEM_NAME MATCHES "^Linux")
	set(UDEV_RULES_INSTALL_DIR /lib/udev/rules.d CACHE PATH "install directory for linux udev config")
	install(FILES 90-eismultiplexer.rules DESTINATION ${UDEV_RULES_INSTALL_DIR})
endif()
