mirror of
https://github.com/Kitware/CMake.git
synced 2025-12-31 02:39:48 -06:00
e5d9fce03f
Divert LCC compiler as a new one, instead of treating it as GNU. Since old times, Elbrus C/C++/Fortran Compiler (LCC) by MCST has been passing checks for GNU compilers, so it has been identified as GNU. Now, with intent of seriously upstreaming its support, it has been added as a separate LCC compiler, and its version displays not a supported GCC version, but LCC version itself (e.g. LCC 1.25.19 instead of GNU 7.3.0). This commit adds its support for detection, and also converts basically every check like 'is this compiler GNU?' to 'is this compiler GNU or LCC?'. The only places where this check is untouched, is where it regards other platforms where LCC is unavailable (primarily non-Linux), and where it REALLY differs from GNU compiler. Note: this transition may break software that are already ported to Elbrus, but hardly relies that LCC will be detected as GNU; still such software is not known.
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 "^(LCC|Cray|PGI|NVHPC|XL|XLClang|IntelLLVM|Fujitsu|FujitsuClang)$")
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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 ${CMAKE_CURRENT_BINARY_DIR}/compiler_multi_files)
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endif()
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endif()
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if (CMAKE_CXX_COMPILE_FEATURES)
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if (NOT CMAKE_CXX_COMPILER_ID MATCHES "^(LCC|Cray|PGI|NVHPC|XL|XLClang|IntelLLVM|Fujitsu|FujitsuClang)$")
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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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