Crow/CMakeLists.txt

#####################################
# Define Project-Wide Settings
#####################################
cmake_minimum_required(VERSION 3.15.0 FATAL_ERROR)

# Define the project name and language
project(Crow
	LANGUAGES CXX
)

# Set required C++ standard
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED TRUE)

# Default to build type "Release"
if(NOT CMAKE_BUILD_TYPE)
	message(STATUS "No build type selected, default to Release")
	set(CMAKE_BUILD_TYPE "Release")
endif()

#####################################
# Define Options
#####################################
option(CROW_BUILD_EXAMPLES     "Build the examples in the project"      ON )
option(CROW_BUILD_TESTS        "Build the tests in the project"         ON )
option(CROW_AMALGAMATE         "Combine all headers into one"           OFF)
option(CROW_INSTALL            "Add install step for Crow"              ON )

option(CROW_ENABLE_SSL         "Enable SSL capabilities (OpenSSL)"      OFF)
option(CROW_ENABLE_COMPRESSION "Enable compression capabilities (ZLIB)" OFF)

#####################################
# Define Targets
#####################################
add_library(Crow INTERFACE)
add_library(Crow::Crow ALIAS Crow)

target_include_directories(Crow
	INTERFACE
		$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
		$<INSTALL_INTERFACE:include>
)

find_package(Boost 1.64 COMPONENTS system date_time REQUIRED)
find_package(Threads REQUIRED)

target_link_libraries(Crow
	INTERFACE
		Boost::boost Boost::system Boost::date_time
		Threads::Threads
)

if(CROW_ENABLE_COMPRESSION)
	find_package(ZLIB REQUIRED)
	target_link_libraries(Crow INTERFACE ZLIB::ZLIB)
	target_compile_definitions(Crow INTERFACE CROW_ENABLE_COMPRESSION)
endif()

if(CROW_ENABLE_SSL)
	find_package(OpenSSL REQUIRED)
	target_link_libraries(Crow INTERFACE OpenSSL::SSL)
	target_compile_definitions(Crow INTERFACE CROW_ENABLE_SSL)
endif()

if(CROW_AMALGAMATE)
	add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/crow_all.h
		COMMAND python3 ${CMAKE_CURRENT_SOURCE_DIR}/scripts/merge_all.py
		${CMAKE_CURRENT_SOURCE_DIR}/include
		${CMAKE_CURRENT_BINARY_DIR}/crow_all.h
		WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
		DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/include/*.h ${CMAKE_CURRENT_SOURCE_DIR}/include/crow/*.h ${CMAKE_CURRENT_SOURCE_DIR}/include/crow/middlewares/*.h
	)

	add_custom_target(crow_amalgamated ALL DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/crow_all.h)
endif()

# Examples
if(CROW_BUILD_EXAMPLES)
	add_subdirectory(examples)
endif()

# Tests
if(NOT MSVC AND CROW_BUILD_TESTS)
	if(NOT CROW_ENABLE_COMPRESSION)
		message(STATUS "Compression tests are omitted. (Configure with CROW_ENABLE_COMPRESSION=ON to enable them)")
	endif()
	if(NOT CROW_ENABLE_SSL)
		message(STATUS "SSL tests are omitted. (Configure with CROW_ENABLE_SSL=ON to enable them)")
	endif()

	add_subdirectory(tests)
	enable_testing()
	add_test(NAME crow_test COMMAND ${CMAKE_CURRENT_BINARY_DIR}/tests/unittest)
	add_test(NAME template_test COMMAND ${CMAKE_CURRENT_BINARY_DIR}/tests/template/test.py WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/tests/template)
endif()

#####################################
# Install Files
#####################################
if(CROW_INSTALL)
	install(TARGETS Crow EXPORT CrowTargets)
	install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/include/ DESTINATION include)

	install(EXPORT CrowTargets
		FILE CrowTargets.cmake
		NAMESPACE Crow::
		DESTINATION lib/cmake/Crow
	)

	include(CMakePackageConfigHelpers)
	configure_package_config_file(
		"${CMAKE_CURRENT_SOURCE_DIR}/cmake/CrowConfig.cmake.in"
		"${CMAKE_CURRENT_BINARY_DIR}/CrowConfig.cmake"
		INSTALL_DESTINATION lib/cmake/Crow
	)
	install(FILES
    "${CMAKE_CURRENT_BINARY_DIR}/CrowConfig.cmake"
    DESTINATION lib/cmake/Crow
  )
endif()

set(CPACK_GENERATOR "DEB")
set(CPACK_DEBIAN_PACKAGE_MAINTAINER "CrowCpp")
set(CPACK_DEBIAN_PACKAGE_SHLIBDEPS ON)

include(CPack)