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188 lines
7.3 KiB
188 lines
7.3 KiB
cmake_minimum_required(VERSION 3.10)
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get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
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if(NOT _isMultiConfig AND NOT CMAKE_BUILD_TYPE)
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set(CMAKE_BUILD_TYPE Debug CACHE STRING "Choose the type of build" FORCE)
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endif()
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project(ConfigSources CXX)
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if("${CMAKE_CXX_COMPILER_ID};${CMAKE_CXX_SIMULATE_ID}" STREQUAL "Intel;MSVC")
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string(APPEND CMAKE_CXX_FLAGS_DEBUG " -Z7")
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string(APPEND CMAKE_CXX_FLAGS_RELWITHDEBINFO " -Z7")
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endif()
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# Source file(s) named with the configuration(s).
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file(GENERATE
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OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/config_$<CONFIG>.cpp"
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CONTENT [[
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#if defined(_WIN32) && defined(OBJ_SHARED)
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__declspec(dllexport)
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#endif
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void config_$<CONFIG>() {}
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]]
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)
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# Custom command outputs named with the configuration(s).
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add_custom_command(
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OUTPUT "custom1_$<CONFIG>.cpp"
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COMMAND ${CMAKE_COMMAND} -E copy "${CMAKE_CURRENT_SOURCE_DIR}/custom1.cpp.in" "custom1_$<CONFIG>.cpp"
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DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/custom1.cpp.in
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VERBATIM
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)
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# Output path starts in a generator expression.
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add_custom_command(
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OUTPUT "$<1:custom2_$<CONFIG>.cpp>"
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COMMAND ${CMAKE_COMMAND} -E copy "${CMAKE_CURRENT_SOURCE_DIR}/custom2.cpp.in" "custom2_$<CONFIG>.cpp"
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DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/custom2.cpp.in
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VERBATIM
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)
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# Source file generated as a custom command's byproduct.
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add_custom_command(
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OUTPUT custom3.txt
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BYPRODUCTS "$<1:custom3_$<CONFIG>.cpp>"
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COMMAND ${CMAKE_COMMAND} -E copy "${CMAKE_CURRENT_SOURCE_DIR}/custom3.cpp.in" "custom3_$<CONFIG>.cpp"
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COMMAND ${CMAKE_COMMAND} -E touch custom3.txt
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DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/custom3.cpp.in
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VERBATIM
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)
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# Source file generated as a custom target's byproduct.
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add_custom_target(custom4
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BYPRODUCTS "custom4_$<CONFIG>.cpp"
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COMMAND ${CMAKE_COMMAND} -E copy_if_different "${CMAKE_CURRENT_SOURCE_DIR}/custom4.cpp.in" "custom4_$<CONFIG>.cpp"
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VERBATIM
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)
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# Source file generated by appended custom command.
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add_custom_command(
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OUTPUT "custom5_$<CONFIG>.cpp"
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COMMAND ${CMAKE_COMMAND} -E echo custom5_$<CONFIG>.cpp
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DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/custom5.cpp.in
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VERBATIM
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)
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add_custom_command(APPEND
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OUTPUT "custom5_$<CONFIG>.cpp"
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COMMAND ${CMAKE_COMMAND} -E copy "${CMAKE_CURRENT_SOURCE_DIR}/custom5.cpp.in" "custom5_$<CONFIG>.cpp.in"
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VERBATIM
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)
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# Appending through any configuration's output affects all configurations.
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if(CMAKE_CONFIGURATION_TYPES MATCHES ";([^;]+)$")
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set(last_config "${CMAKE_MATCH_1}")
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else()
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set(last_config ${CMAKE_BUILD_TYPE})
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endif()
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add_custom_command(APPEND
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OUTPUT "custom5_${last_config}.cpp"
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COMMAND ${CMAKE_COMMAND} -E copy "custom5_$<CONFIG>.cpp.in" "custom5_$<CONFIG>.cpp"
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VERBATIM
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)
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foreach(n RANGE 1 5)
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foreach(other ${CMAKE_BUILD_TYPE} Release RelWithDebInfo MinSizeRel)
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set_property(SOURCE custom${n}_${other}.cpp PROPERTY COMPILE_DEFINITIONS CUSTOM_CFG_OTHER)
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endforeach()
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set_property(SOURCE custom${n}_Debug.cpp PROPERTY COMPILE_DEFINITIONS CUSTOM_CFG_DEBUG)
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endforeach()
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add_library(Custom STATIC
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custom1_$<CONFIG>.cpp
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custom2_$<CONFIG>.cpp
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custom3_$<CONFIG>.cpp custom3.txt
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custom4_$<CONFIG>.cpp
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custom5_$<CONFIG>.cpp
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)
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# Per-config sources via INTERFACE_SOURCES.
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add_library(iface INTERFACE)
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target_sources(iface INTERFACE
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"${CMAKE_CURRENT_SOURCE_DIR}/iface_src.cpp"
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"$<$<CONFIG:Debug>:${CMAKE_CURRENT_SOURCE_DIR}/iface_debug_src.cpp>"
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"$<$<NOT:$<CONFIG:Debug>>:${CMAKE_CURRENT_SOURCE_DIR}/iface_other_src.cpp>"
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"$<$<CONFIG:NotAConfig>:${CMAKE_CURRENT_SOURCE_DIR}/does_not_exist.cpp>"
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)
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target_compile_definitions(iface INTERFACE
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"$<$<CONFIG:Debug>:CFG_DEBUG>"
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"$<$<NOT:$<CONFIG:Debug>>:CFG_OTHER>"
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)
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add_executable(ConfigSources
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$<$<CONFIG:Debug>:main_debug.cpp>
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$<$<NOT:$<CONFIG:Debug>>:main_other.cpp>
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$<$<CONFIG:NotAConfig>:does_not_exist.cpp>
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${CMAKE_CURRENT_BINARY_DIR}/config_$<CONFIG>.cpp
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)
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target_link_libraries(ConfigSources Custom iface)
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# Per-config sources via LINK_LIBRARIES.
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add_library(iface_debug INTERFACE)
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target_sources(iface_debug INTERFACE
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"${CMAKE_CURRENT_SOURCE_DIR}/iface_src.cpp"
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"${CMAKE_CURRENT_SOURCE_DIR}/iface_debug_src.cpp"
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)
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add_library(iface_other INTERFACE)
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target_sources(iface_other INTERFACE
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"${CMAKE_CURRENT_SOURCE_DIR}/iface_src.cpp"
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"${CMAKE_CURRENT_SOURCE_DIR}/iface_other_src.cpp"
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)
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add_executable(ConfigSourcesLink main.cpp)
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target_compile_definitions(ConfigSourcesLink PRIVATE
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"$<$<CONFIG:Debug>:CFG_DEBUG>"
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"$<$<NOT:$<CONFIG:Debug>>:CFG_OTHER>"
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)
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target_link_libraries(ConfigSourcesLink PRIVATE
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Custom
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"$<$<CONFIG:Debug>:iface_debug>"
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"$<$<NOT:$<CONFIG:Debug>>:iface_other>"
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"$<$<CONFIG:NotAConfig>:iface_does_not_exist>"
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)
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# Per-config sources via INTERFACE_LINK_LIBRARIES.
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add_library(ConfigSourcesIface INTERFACE)
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target_link_libraries(ConfigSourcesIface INTERFACE
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"$<$<CONFIG:Debug>:iface_debug>"
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"$<$<NOT:$<CONFIG:Debug>>:iface_other>"
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"$<$<CONFIG:NotAConfig>:iface_does_not_exist>"
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)
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add_executable(ConfigSourcesLinkIface main.cpp)
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target_compile_definitions(ConfigSourcesLinkIface PRIVATE
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"$<$<CONFIG:Debug>:CFG_DEBUG>"
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"$<$<NOT:$<CONFIG:Debug>>:CFG_OTHER>"
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)
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target_link_libraries(ConfigSourcesLinkIface Custom ConfigSourcesIface)
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# A target with sources in only one configuration that is not the
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# first in CMAKE_CONFIGURATION_TYPES.
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if(CMAKE_CONFIGURATION_TYPES MATCHES ";([^;]+)")
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set(one_config "${CMAKE_MATCH_1}")
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else()
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set(one_config "${CMAKE_BUILD_TYPE}")
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endif()
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add_library(OneConfigOnly OBJECT "$<$<CONFIG:${one_config}>:${CMAKE_CURRENT_SOURCE_DIR}/iface_src.cpp>")
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set_property(TARGET OneConfigOnly PROPERTY LINKER_LANGUAGE CXX)
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add_executable(ConfigSourcesUseOne main_one_config.cpp)
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target_compile_definitions(ConfigSourcesUseOne PRIVATE "$<$<CONFIG:${one_config}>:CFG_ONE>")
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target_link_libraries(ConfigSourcesUseOne PRIVATE "$<$<CONFIG:${one_config}>:OneConfigOnly>")
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add_library(OneConfigOnlyIface INTERFACE)
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target_sources(OneConfigOnlyIface INTERFACE "$<$<CONFIG:${one_config}>:${CMAKE_CURRENT_SOURCE_DIR}/iface_src.cpp>")
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add_executable(ConfigSourcesUseOneIface main_one_config.cpp)
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target_compile_definitions(ConfigSourcesUseOneIface PRIVATE "$<$<CONFIG:${one_config}>:CFG_ONE>")
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target_link_libraries(ConfigSourcesUseOneIface PRIVATE "$<$<CONFIG:${one_config}>:OneConfigOnlyIface>")
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# ---------------------------------------------------------------------------
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# Makes sure that each configuration uses the correct generated file.
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add_library(ObjLibFromGeneratedSources OBJECT)
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set_property(TARGET ObjLibFromGeneratedSources PROPERTY POSITION_INDEPENDENT_CODE 1)
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target_compile_definitions(ObjLibFromGeneratedSources PRIVATE OBJ_SHARED)
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target_sources(ObjLibFromGeneratedSources PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/config_$<CONFIG>.cpp)
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add_library(SharedLibFromObjLibFromGeneratedSources SHARED shared.cpp)
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target_link_libraries(SharedLibFromObjLibFromGeneratedSources PRIVATE ObjLibFromGeneratedSources)
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# ---------------------------------------------------------------------------
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# Make sure that additional build-events do not confuse CMake when using generated files.
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add_library(SharedLibFromGeneratedSources SHARED)
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set_property(TARGET SharedLibFromGeneratedSources PROPERTY POSITION_INDEPENDENT_CODE 1)
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target_sources(SharedLibFromGeneratedSources PRIVATE
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shared.cpp
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${CMAKE_CURRENT_BINARY_DIR}/config_$<CONFIG>.cpp
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)
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add_custom_command(TARGET SharedLibFromGeneratedSources POST_BUILD
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COMMAND "${CMAKE_COMMAND}" "-E" "echo" "$<TARGET_FILE:SharedLibFromGeneratedSources>"
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)
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