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