b0f46c48f6
Previously compilers that only supported the meta-level flags would not have any of the granular features listed. Now we presume that they have full support and enable all the features. Update granular feature tests to skip the actual compilation checks for the presumed features.
220 lines
9.1 KiB
CMake
220 lines
9.1 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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include(CheckCXXSourceCompiles)
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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 "${CMAKE_CURRENT_BINARY_DIR}/test_compiler_detection.h"
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PREFIX TEST
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COMPILERS GNU Clang AppleClang MSVC SunPro Intel
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VERSION 3.1
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PROLOG "// something"
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EPILOG "// more"
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FEATURES
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${cxx_known_features} ${c_known_features}
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)
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write_compiler_detection_header(
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FILE "${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 "${CMAKE_CURRENT_BINARY_DIR}/compiler_multi_files/compiler_support"
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COMPILERS GNU Clang AppleClang MSVC SunPro Intel
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VERSION 3.1
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FEATURES
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${cxx_known_features} ${c_known_features}
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)
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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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# Only run the compiler detection header test for compilers with
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# detailed features tables, not just meta-features
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if (CMAKE_C_COMPILE_FEATURES)
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if(NOT CMAKE_C_COMPILER_ID MATCHES "^(Cray|PGI|XL|XLClang)$")
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set(C_expected_features ${CMAKE_C_COMPILE_FEATURES})
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list(FILTER C_expected_features EXCLUDE REGEX "^c_std_[0-9][0-9]")
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endif()
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endif()
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if (C_expected_features)
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string(REGEX REPLACE "^([0-9]+)\\.[0-9]+\\.[0-9]+.*" "\\1" COMPILER_VERSION_MAJOR "${CMAKE_C_COMPILER_VERSION}")
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string(REGEX REPLACE "^[0-9]+\\.([0-9]+)\\.[0-9]+.*" "\\1" COMPILER_VERSION_MINOR "${CMAKE_C_COMPILER_VERSION}")
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string(REGEX REPLACE "^[0-9]+\\.[0-9]+\\.([0-9]+).*" "\\1" COMPILER_VERSION_PATCH "${CMAKE_C_COMPILER_VERSION}")
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if (CMAKE_C_COMPILER_ID STREQUAL "GNU"
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OR (CMAKE_C_COMPILER_ID STREQUAL "Clang" AND NOT "x${CMAKE_CXX_SIMULATE_ID}" STREQUAL "xMSVC")
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OR CMAKE_C_COMPILER_ID STREQUAL "AppleClang"
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OR CMAKE_C_COMPILER_ID STREQUAL "Intel")
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add_executable(WriteCompilerDetectionHeader_C11 main.c)
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set_property(TARGET WriteCompilerDetectionHeader_C11 PROPERTY C_STANDARD 11)
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set_defines(WriteCompilerDetectionHeader_C11 "EXPECTED_COMPILER_C_FUNCTION_PROTOTYPES;EXPECTED_COMPILER_C_RESTRICT" "")
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add_executable(WriteCompilerDetectionHeader_C11_multi main_multi.c)
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set_property(TARGET WriteCompilerDetectionHeader_C11_multi PROPERTY C_STANDARD 11)
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set_defines(WriteCompilerDetectionHeader_C11_multi "EXPECTED_COMPILER_C_FUNCTION_PROTOTYPES;EXPECTED_COMPILER_C_RESTRICT" "")
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target_include_directories(WriteCompilerDetectionHeader_C11_multi PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/compiler_multi_files)
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add_executable(C_undefined c_undefined.c)
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set_property(TARGET C_undefined PROPERTY C_STANDARD 90)
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include(CheckCCompilerFlag)
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check_c_compiler_flag(-Werror=undef use_error_undef)
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if (use_error_undef)
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target_compile_options(C_undefined PRIVATE -Werror=undef)
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endif()
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add_executable(WriteCompilerDetectionHeader_C main.c)
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set_property(TARGET WriteCompilerDetectionHeader_C PROPERTY C_STANDARD 90)
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set_defines(WriteCompilerDetectionHeader_C "EXPECTED_COMPILER_C_FUNCTION_PROTOTYPES" "EXPECTED_COMPILER_C_RESTRICT")
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add_executable(WriteCompilerDetectionHeader_C_multi main_multi.c)
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set_property(TARGET WriteCompilerDetectionHeader_C_multi PROPERTY C_STANDARD 90)
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set_defines(WriteCompilerDetectionHeader_C_multi "EXPECTED_COMPILER_C_FUNCTION_PROTOTYPES" "EXPECTED_COMPILER_C_RESTRICT")
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target_include_directories(WriteCompilerDetectionHeader_C_multi PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/compiler_multi_files)
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endif()
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endif()
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if (CMAKE_CXX_COMPILE_FEATURES)
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if(NOT CMAKE_CXX_COMPILER_ID MATCHES "^(Cray|PGI|XL|XLClang)$")
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set(CXX_expected_features ${CMAKE_CXX_COMPILE_FEATURES})
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list(FILTER CXX_expected_features EXCLUDE REGEX "^cxx_std_[0-9][0-9]")
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endif()
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endif()
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if (NOT CXX_expected_features)
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file(WRITE "${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 "${CMAKE_CURRENT_BINARY_DIR}/dummy.cpp")
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if(UNIX OR NOT CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
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check_cxx_source_compiles("#include \"${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 ${CMAKE_CURRENT_BINARY_DIR}/test_compiler_detection.h was expected to cause an error, but did not.")
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endif()
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endif()
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return()
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endif()
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string(REGEX REPLACE "^([0-9]+)\\.[0-9]+\\.[0-9]+.*" "\\1" COMPILER_VERSION_MAJOR "${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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if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU"
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OR (CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND NOT "x${CMAKE_CXX_SIMULATE_ID}" STREQUAL "xMSVC")
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OR CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang"
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OR CMAKE_CXX_COMPILER_ID STREQUAL "SunPro"
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OR CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
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# False for C++98 mode.
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list(APPEND false_defs EXPECTED_COMPILER_CXX_DELEGATING_CONSTRUCTORS)
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list(APPEND false_defs EXPECTED_COMPILER_CXX_VARIADIC_TEMPLATES)
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endif()
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# for msvc the compiler version determines which c++11 features are available.
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if (CMAKE_CXX_COMPILER_ID STREQUAL "MSVC"
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OR (CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND "x${CMAKE_CXX_SIMULATE_ID}" STREQUAL "xMSVC"))
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if(";${CMAKE_CXX_COMPILE_FEATURES};" MATCHES ";cxx_delegating_constructors;")
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list(APPEND true_defs EXPECTED_COMPILER_CXX_DELEGATING_CONSTRUCTORS)
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list(APPEND true_defs EXPECTED_COMPILER_CXX_VARIADIC_TEMPLATES)
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else()
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list(APPEND false_defs EXPECTED_COMPILER_CXX_DELEGATING_CONSTRUCTORS)
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list(APPEND false_defs EXPECTED_COMPILER_CXX_VARIADIC_TEMPLATES)
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endif()
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endif()
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add_executable(WriteCompilerDetectionHeader main.cpp)
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set_property(TARGET WriteCompilerDetectionHeader PROPERTY CXX_STANDARD 98)
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set_defines(WriteCompilerDetectionHeader "${true_defs}" "${false_defs}")
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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}" "${false_defs}")
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# test for ALLOW_UNKNOWN_COMPILERS
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# use a compiler does not match the current one,
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# so one always hits the fallback code
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if (CMAKE_CXX_COMPILER_ID STREQUAL "SunPro")
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set(OTHER_CXX "Intel")
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else()
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set(OTHER_CXX "SunPro")
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endif()
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write_compiler_detection_header(
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FILE "${CMAKE_CURRENT_BINARY_DIR}/test_compiler_detection_allow_unknown.h"
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PREFIX TEST
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COMPILERS ${OTHER_CXX}
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FEATURES cxx_nullptr
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ALLOW_UNKNOWN_COMPILERS
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)
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# intentionally abuse the TEST_NULLPTR variable: this will only work
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# with the fallback code.
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check_cxx_source_compiles("#include \"${CMAKE_CURRENT_BINARY_DIR}/test_compiler_detection_allow_unknown.h\"
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int main() {\n int i = TEST_NULLPTR;\n return 0; }\n"
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file_include_works_allow_unknown
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)
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if (NOT file_include_works_allow_unknown)
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message(SEND_ERROR "Inclusion of ${CMAKE_CURRENT_BINARY_DIR}/test_compiler_detection_allow_unknown.h was expected to work, but did not.")
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endif()
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# test for BARE_FEATURES
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write_compiler_detection_header(
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FILE "${CMAKE_CURRENT_BINARY_DIR}/test_compiler_detection_bare_features.h"
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PREFIX TEST
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COMPILERS GNU Clang AppleClang MSVC SunPro Intel
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VERSION 3.1
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BARE_FEATURES cxx_nullptr cxx_override cxx_noexcept cxx_final
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)
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add_executable(WriteCompilerDetectionHeaderBareFeatures main_bare.cpp)
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set_property(TARGET WriteCompilerDetectionHeaderBareFeatures PROPERTY CXX_STANDARD 11)
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