131 lines
5.0 KiB
CMake
131 lines
5.0 KiB
CMake
cmake_minimum_required(VERSION 3.1.0)
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project(WriteCompilerDetectionHeader)
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set(CMAKE_INCLUDE_CURRENT_DIR ON)
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include(WriteCompilerDetectionHeader)
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get_property(cxx_known_features GLOBAL PROPERTY CMAKE_CXX_KNOWN_FEATURES)
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get_property(c_known_features GLOBAL PROPERTY CMAKE_C_KNOWN_FEATURES)
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write_compiler_detection_header(
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FILE "${CMAKE_CURRENT_BINARY_DIR}/test_compiler_detection.h"
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PREFIX TEST
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COMPILERS GNU Clang AppleClang MSVC
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VERSION 3.1
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PROLOG "// something"
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EPILOG "// more"
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FEATURES
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${cxx_known_features} ${c_known_features}
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)
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if (NOT CMAKE_CXX_COMPILE_FEATURES AND NOT CMAKE_C_COMPILE_FEATURES)
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file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/dummy.cpp"
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"int main(int,char**) { return 0; }\n"
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)
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add_executable(WriteCompilerDetectionHeader "${CMAKE_CURRENT_BINARY_DIR}/dummy.cpp")
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include(CheckCXXSourceCompiles)
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check_cxx_source_compiles("#include \"${CMAKE_CURRENT_BINARY_DIR}/test_compiler_detection.h\"\nint main() { return 0; }\n"
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file_include_works
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)
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if (file_include_works)
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message(SEND_ERROR "Inclusion of ${CMAKE_CURRENT_BINARY_DIR}/test_compiler_detection.h was expected to cause an error, but did not.")
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endif()
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return()
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endif()
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string(REGEX REPLACE "^([0-9]+)\\.[0-9]+\\.[0-9]+.*" "\\1" COMPILER_VERSION_MAJOR "${CMAKE_CXX_COMPILER_VERSION}")
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string(REGEX REPLACE "^[0-9]+\\.([0-9]+)\\.[0-9]+.*" "\\1" COMPILER_VERSION_MINOR "${CMAKE_CXX_COMPILER_VERSION}")
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string(REGEX REPLACE "^[0-9]+\\.[0-9]+\\.([0-9]+).*" "\\1" COMPILER_VERSION_PATCH "${CMAKE_CXX_COMPILER_VERSION}")
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macro(set_defines target true_defs false_defs)
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set(defines)
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foreach(def ${true_defs})
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list(APPEND defines ${def}=1)
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endforeach()
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foreach(def ${false_defs})
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list(APPEND defines ${def}=0)
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endforeach()
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target_compile_definitions(${target}
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PRIVATE
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${defines}
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EXPECTED_COMPILER_VERSION_MAJOR=${COMPILER_VERSION_MAJOR}
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EXPECTED_COMPILER_VERSION_MINOR=${COMPILER_VERSION_MINOR}
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EXPECTED_COMPILER_VERSION_PATCH=${COMPILER_VERSION_PATCH}
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)
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endmacro()
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if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU"
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OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang"
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OR CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
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# False for C++98 mode.
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list(APPEND false_defs EXPECTED_COMPILER_CXX_DELEGATING_CONSTRUCTORS)
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list(APPEND false_defs EXPECTED_COMPILER_CXX_VARIADIC_TEMPLATES)
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endif()
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# for msvc the compiler version determines which c++11 features are available.
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# Both variadic templates and delegating constructors support exist in
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# all versions that we write compile headers for.
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if (CMAKE_CXX_COMPILER_ID STREQUAL "MSVC" AND
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";${CMAKE_CXX_COMPILE_FEATURES};" MATCHES ";cxx_delegating_constructors;")
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list(APPEND true_defs EXPECTED_COMPILER_CXX_DELEGATING_CONSTRUCTORS)
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list(APPEND true_defs EXPECTED_COMPILER_CXX_VARIADIC_TEMPLATES)
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else(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
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list(APPEND false_defs EXPECTED_COMPILER_CXX_DELEGATING_CONSTRUCTORS)
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list(APPEND false_defs EXPECTED_COMPILER_CXX_VARIADIC_TEMPLATES)
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endif()
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if (CMAKE_C_COMPILER_ID STREQUAL "GNU"
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OR CMAKE_C_COMPILER_ID STREQUAL "Clang"
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OR CMAKE_C_COMPILER_ID STREQUAL "AppleClang")
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add_executable(C_undefined c_undefined.c)
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set_property(TARGET C_undefined PROPERTY CXX_STANDARD 90)
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target_compile_options(C_undefined PRIVATE -Werror=undef)
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endif()
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add_executable(WriteCompilerDetectionHeader main.cpp)
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set_property(TARGET WriteCompilerDetectionHeader PROPERTY CXX_STANDARD 98)
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set_defines(WriteCompilerDetectionHeader "${true_defs}" "${false_defs}")
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write_compiler_detection_header(
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FILE "${CMAKE_CURRENT_BINARY_DIR}/compiler_multi_files/multi_file_compiler_detection.h"
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PREFIX MULTI
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OUTPUT_FILES_VAR multi_files
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OUTPUT_DIR "${CMAKE_CURRENT_BINARY_DIR}/compiler_multi_files/compiler_support"
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COMPILERS GNU Clang AppleClang MSVC
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VERSION 3.1
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FEATURES
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${cxx_known_features} ${c_known_features}
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)
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add_executable(multi_files multi_files.cpp)
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set_property(TARGET multi_files PROPERTY CXX_STANDARD 98)
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target_include_directories(multi_files PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/compiler_multi_files)
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set_defines(multi_files "${true_defs}" "${false_defs}")
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if(MSVC)
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return() # MSVC has only one mode.
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endif()
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# Since GNU 4.7
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if (";${CMAKE_CXX_COMPILE_FEATURES};" MATCHES ";cxx_delegating_constructors;")
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list(APPEND true_defs EXPECTED_COMPILER_CXX_DELEGATING_CONSTRUCTORS)
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list(REMOVE_ITEM false_defs EXPECTED_COMPILER_CXX_DELEGATING_CONSTRUCTORS)
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endif()
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# Since GNU 4.4
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if (";${CMAKE_CXX_COMPILE_FEATURES};" MATCHES ";cxx_variadic_templates;")
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list(APPEND true_defs EXPECTED_COMPILER_CXX_VARIADIC_TEMPLATES)
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list(REMOVE_ITEM false_defs EXPECTED_COMPILER_CXX_VARIADIC_TEMPLATES)
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endif()
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add_executable(WriteCompilerDetectionHeader_11 main.cpp)
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set_property(TARGET WriteCompilerDetectionHeader_11 PROPERTY CXX_STANDARD 11)
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set_defines(WriteCompilerDetectionHeader_11 "${true_defs}" "${false_defs}")
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add_executable(multi_files_11 multi_files.cpp)
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set_property(TARGET multi_files_11 PROPERTY CXX_STANDARD 11)
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target_include_directories(multi_files_11 PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/compiler_multi_files)
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set_defines(multi_files_11 "${true_defs}" "${false_defs}")
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