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CMakeLists.txt
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####
# Set minimum version of CMake. Since command 'project' use
# VERSION sub-option we need 3.0.
cmake_minimum_required(VERSION 3.3)
####
# Set variables:
# * PROJECT_NAME
# * PROJECT_VERSION
project(sysfsled VERSION 0.1.1)
add_subdirectory(lib)
####
# Create targets
add_library(sysfsled src/led.cpp)
# used to make including easier, see https://github.com/boostcon/cppnow_presentations_2017/blob/master/05-19-2017_friday/effective_cmake__daniel_pfeifer__cppnow_05-19-2017.pdf
add_library(sysfsled::sysfsled ALIAS sysfsled)
# Generate:
# * ${CMAKE_CURRENT_BINARY_DIR}/generated_headers/x/X_EXPORT.h with X_EXPORT
# Renaming because:
# * We need prefix to fit OSX/iOS frameworks layout
# * File name match name of the macro
set(generated_headers "${CMAKE_CURRENT_BINARY_DIR}/generated_headers")
set(sysfsled_export "${generated_headers}/sysfsled/SYSFSLED_EXPORT.hpp")
include(GenerateExportHeader)
generate_export_header(sysfsled EXPORT_FILE_NAME ${sysfsled_export})
# Global includes. Used by all targets
# Note:
# * header location in project: include/x.hpp
# * header can be included by C++ code `#include <x/x.hpp>`
# * header location in project: ${CMAKE_CURRENT_BINARY_DIR}/generated_headers/x/X_EXPORT.h
# * header can be included by: `#include <X_EXPORT.h>`
target_include_directories(
sysfsled PUBLIC
#"$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/src>"
"$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/include>"
"$<BUILD_INTERFACE:${generated_headers}>"
)
target_include_directories(
sysfsled PRIVATE
"$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/src>"
)
# Link required library
target_link_libraries(sysfsled PUBLIC udevpp)
# Installation (https://github.com/forexample/package-example) {
# Layout. This works for all platforms:
# * <prefix>/lib/cmake/<PROJECT-NAME>
# * <prefix>/lib/
# * <prefix>/include/
set(config_install_dir "lib/cmake/${PROJECT_NAME}")
set(include_install_dir "include")
#set(generated_dir "${CMAKE_CURRENT_BINARY_DIR}/generated")
# Configuration
# set(version_config "${generated_dir}/${PROJECT_NAME}ConfigVersion.cmake")
# set(project_config "${generated_dir}/${PROJECT_NAME}Config.cmake")
set(version_config "${PROJECT_NAME}ConfigVersion.cmake")
set(project_config "${PROJECT_NAME}Config.cmake")
set(TARGETS_EXPORT_NAME "${PROJECT_NAME}Targets")
set(namespace "${PROJECT_NAME}::")
# Include module with fuction 'write_basic_package_version_file'
include(CMakePackageConfigHelpers)
# Configure '<PROJECT-NAME>ConfigVersion.cmake'
# Use:
# * PROJECT_VERSION
write_basic_package_version_file(
"${version_config}" COMPATIBILITY SameMajorVersion
)
# Configure '<PROJECT-NAME>Config.cmake'
# Use variables:
# * TARGETS_EXPORT_NAME
# * PROJECT_NAME
configure_package_config_file(
"cmake/Config.cmake.in"
"${project_config}"
INSTALL_DESTINATION "${config_install_dir}"
)
# Targets:
# * <prefix>/lib/libsysfsled.a
# * header location after install: <prefix>/include/sysfsled/sysfsled.hpp
# * headers can be included by C++ code `#include <sysfsled/sysfsled.hpp>`
install(
TARGETS sysfsled
EXPORT "${TARGETS_EXPORT_NAME}"
LIBRARY DESTINATION "lib"
ARCHIVE DESTINATION "lib"
RUNTIME DESTINATION "bin"
INCLUDES DESTINATION "${include_install_dir}"
)
# Install headers:
# * include/X.hpp -> <prefix>/include/<project/X.hpp
install(
DIRECTORY "src"
DESTINATION "${include_install_dir}"
FILES_MATCHING PATTERN "*.hpp"
)
# Install export headers:
# * ${CMAKE_CURRENT_BINARY_DIR}/.../X_EXPORT.h -> <prefix>/include/<project>/X_EXPORT.h
install(
FILES "${sysfsled_export}"
DESTINATION "${include_install_dir}/sysfsled"
)
# Install package configuration file and version file for find_package
# * <prefix>/lib/cmake/<project>/<project>Config.cmake
# * <prefix>/lib/cmake/<project>/<project>ConfigVersion.cmake
install(
FILES "$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/${project_config}>" "$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/${version_config}>"
DESTINATION "${config_install_dir}"
)
# Install the generated target import file
# * <prefix>/lib/cmake/<project>/<project>Config.cmake
install(
EXPORT "${TARGETS_EXPORT_NAME}"
NAMESPACE "${namespace}"
DESTINATION "${config_install_dir}"
)
# Finally, add the example subdirectory:
add_subdirectory(example)
#add_subdirectory(test)
# }