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cmake_minimum_required(VERSION 2.8)
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project(SystemIncludeDirectories)
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add_library(systemlib systemlib.cpp)
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target_include_directories(systemlib PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/systemlib")
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add_library(upstream upstream.cpp)
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target_link_libraries(upstream LINK_PUBLIC systemlib)
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target_compile_options(upstream PRIVATE -Werror=unused-variable)
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target_include_directories(upstream SYSTEM PUBLIC
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$<TARGET_PROPERTY:systemlib,INTERFACE_INCLUDE_DIRECTORIES>
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)
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add_library(config_specific INTERFACE)
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set(testConfig ${CMAKE_BUILD_TYPE})
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target_include_directories(config_specific SYSTEM INTERFACE
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"$<$<CONFIG:${testConfig}>:${CMAKE_CURRENT_SOURCE_DIR}/config_specific>"
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)
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add_library(consumer consumer.cpp)
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target_link_libraries(consumer upstream config_specific)
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target_compile_options(consumer PRIVATE -Werror=unused-variable)
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add_library(iface IMPORTED INTERFACE)
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set_property(TARGET iface PROPERTY INTERFACE_INCLUDE_DIRECTORIES "${CMAKE_CURRENT_SOURCE_DIR}/systemlib_header_only")
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add_library(imported_consumer imported_consumer.cpp)
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target_link_libraries(imported_consumer iface)
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target_compile_options(imported_consumer PRIVATE -Werror=unused-variable)
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add_library(imported_consumer2 imported_consumer.cpp)
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target_link_libraries(imported_consumer2 imported_consumer)
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target_compile_options(imported_consumer2 PRIVATE -Werror=unused-variable)
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macro(do_try_compile error_option)
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set(TC_ARGS
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IFACE_TRY_COMPILE_${error_option}
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"${CMAKE_CURRENT_BINARY_DIR}/try_compile_iface" "${CMAKE_CURRENT_SOURCE_DIR}/imported_consumer.cpp"
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LINK_LIBRARIES iface
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)
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if (${error_option} STREQUAL WITH_ERROR)
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list(APPEND TC_ARGS COMPILE_DEFINITIONS -Werror=unused-variable)
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endif()
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try_compile(${TC_ARGS})
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endmacro()
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do_try_compile(NO_ERROR)
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if (NOT IFACE_TRY_COMPILE_NO_ERROR)
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message(SEND_ERROR "try_compile failed with imported target.")
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endif()
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do_try_compile(WITH_ERROR)
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if (NOT IFACE_TRY_COMPILE_WITH_ERROR)
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message(SEND_ERROR "try_compile failed with imported target with error option.")
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endif()
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