diff options
Diffstat (limited to 'Modules/Compiler/Clang.cmake')
| -rw-r--r-- | Modules/Compiler/Clang.cmake | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/Modules/Compiler/Clang.cmake b/Modules/Compiler/Clang.cmake index f65916f..cd47aa6 100644 --- a/Modules/Compiler/Clang.cmake +++ b/Modules/Compiler/Clang.cmake @@ -105,3 +105,123 @@ else() set(CMAKE_${lang}_COMPILE_OPTIONS_CREATE_PCH -Xclang -emit-pch -Xclang -include -Xclang <PCH_HEADER>) endmacro() endif() + +macro(__compiler_clang_cxx_standards lang) + if("x${CMAKE_${lang}_COMPILER_FRONTEND_VARIANT}" STREQUAL "xGNU") + if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 2.1) + set(CMAKE_${lang}98_STANDARD_COMPILE_OPTION "-std=c++98") + set(CMAKE_${lang}98_EXTENSION_COMPILE_OPTION "-std=gnu++98") + endif() + + if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 3.1) + set(CMAKE_${lang}98_STANDARD__HAS_FULL_SUPPORT ON) + set(CMAKE_${lang}11_STANDARD_COMPILE_OPTION "-std=c++11") + set(CMAKE_${lang}11_EXTENSION_COMPILE_OPTION "-std=gnu++11") + set(CMAKE_${lang}11_STANDARD__HAS_FULL_SUPPORT ON) + elseif(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 2.1) + set(CMAKE_${lang}11_STANDARD_COMPILE_OPTION "-std=c++0x") + set(CMAKE_${lang}11_EXTENSION_COMPILE_OPTION "-std=gnu++0x") + endif() + + if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 3.5) + set(CMAKE_${lang}14_STANDARD_COMPILE_OPTION "-std=c++14") + set(CMAKE_${lang}14_EXTENSION_COMPILE_OPTION "-std=gnu++14") + set(CMAKE_${lang}14_STANDARD__HAS_FULL_SUPPORT ON) + elseif(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 3.4) + set(CMAKE_${lang}14_STANDARD_COMPILE_OPTION "-std=c++1y") + set(CMAKE_${lang}14_EXTENSION_COMPILE_OPTION "-std=gnu++1y") + set(CMAKE_${lang}14_STANDARD__HAS_FULL_SUPPORT ON) + endif() + + set(_clang_version_std17 5.0) + if(CMAKE_SYSTEM_NAME STREQUAL "Android") + set(_clang_version_std17 6.0) + endif() + + if (NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS "${_clang_version_std17}") + set(CMAKE_${lang}17_STANDARD_COMPILE_OPTION "-std=c++17") + set(CMAKE_${lang}17_EXTENSION_COMPILE_OPTION "-std=gnu++17") + elseif (NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 3.5) + set(CMAKE_${lang}17_STANDARD_COMPILE_OPTION "-std=c++1z") + set(CMAKE_${lang}17_EXTENSION_COMPILE_OPTION "-std=gnu++1z") + endif() + + if (NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS "${_clang_version_std17}") + set(CMAKE_${lang}20_STANDARD_COMPILE_OPTION "-std=c++2a") + set(CMAKE_${lang}20_EXTENSION_COMPILE_OPTION "-std=gnu++2a") + endif() + + unset(_clang_version_std17) + + if("x${CMAKE_${lang}_SIMULATE_ID}" STREQUAL "xMSVC") + # The MSVC standard library requires C++14, and MSVC itself has no + # notion of operating in a mode not aware of at least that standard. + set(CMAKE_${lang}98_STANDARD_COMPILE_OPTION "-std=c++14") + set(CMAKE_${lang}98_EXTENSION_COMPILE_OPTION "-std=gnu++14") + set(CMAKE_${lang}11_STANDARD_COMPILE_OPTION "-std=c++14") + set(CMAKE_${lang}11_EXTENSION_COMPILE_OPTION "-std=gnu++14") + + # This clang++ is missing some features because of MSVC compatibility. + unset(CMAKE_${lang}11_STANDARD__HAS_FULL_SUPPORT) + unset(CMAKE_${lang}14_STANDARD__HAS_FULL_SUPPORT) + unset(CMAKE_${lang}17_STANDARD__HAS_FULL_SUPPORT) + unset(CMAKE_${lang}20_STANDARD__HAS_FULL_SUPPORT) + endif() + + __compiler_check_default_language_standard(${lang} 2.1 98) + elseif(CMAKE_${lang}_COMPILER_VERSION VERSION_GREATER_EQUAL 3.9 + AND CMAKE_${lang}_SIMULATE_VERSION VERSION_GREATER_EQUAL 19.0) + # This version of clang-cl and the MSVC version it simulates have + # support for -std: flags. + set(CMAKE_${lang}98_STANDARD_COMPILE_OPTION "") + set(CMAKE_${lang}98_EXTENSION_COMPILE_OPTION "") + set(CMAKE_${lang}98_STANDARD__HAS_FULL_SUPPORT ON) + set(CMAKE_${lang}11_STANDARD_COMPILE_OPTION "") + set(CMAKE_${lang}11_EXTENSION_COMPILE_OPTION "") + set(CMAKE_${lang}14_STANDARD_COMPILE_OPTION "-std:c++14") + set(CMAKE_${lang}14_EXTENSION_COMPILE_OPTION "-std:c++14") + if (CMAKE_${lang}_COMPILER_VERSION VERSION_GREATER_EQUAL 6.0) + set(CMAKE_${lang}17_STANDARD_COMPILE_OPTION "-std:c++17") + set(CMAKE_${lang}17_EXTENSION_COMPILE_OPTION "-std:c++17") + set(CMAKE_${lang}20_STANDARD_COMPILE_OPTION "-std:c++latest") + set(CMAKE_${lang}20_EXTENSION_COMPILE_OPTION "-std:c++latest") + else() + set(CMAKE_${lang}17_STANDARD_COMPILE_OPTION "-std:c++latest") + set(CMAKE_${lang}17_EXTENSION_COMPILE_OPTION "-std:c++latest") + endif() + + __compiler_check_default_language_standard(${lang} 3.9 14) + else() + # This version of clang-cl, or the MSVC version it simulates, does not have + # language standards. Set these options as empty strings so the feature + # test infrastructure can at least check to see if they are defined. + set(CMAKE_${lang}98_STANDARD_COMPILE_OPTION "") + set(CMAKE_${lang}98_EXTENSION_COMPILE_OPTION "") + set(CMAKE_${lang}11_STANDARD_COMPILE_OPTION "") + set(CMAKE_${lang}11_EXTENSION_COMPILE_OPTION "") + set(CMAKE_${lang}14_STANDARD_COMPILE_OPTION "") + set(CMAKE_${lang}14_EXTENSION_COMPILE_OPTION "") + set(CMAKE_${lang}17_STANDARD_COMPILE_OPTION "") + set(CMAKE_${lang}17_EXTENSION_COMPILE_OPTION "") + set(CMAKE_${lang}20_STANDARD_COMPILE_OPTION "") + set(CMAKE_${lang}20_EXTENSION_COMPILE_OPTION "") + + # There is no meaningful default for this + set(CMAKE_${lang}_STANDARD_DEFAULT "") + + # There are no compiler modes so we only need to test features once. + # Override the default macro for this special case. Pretend that + # all language standards are available so that at least compilation + # can be attempted. + macro(cmake_record_${lang}_compile_features) + list(APPEND CMAKE_${lang}_COMPILE_FEATURES + ${lang}_std_98 + ${lang}_std_11 + ${lang}_std_14 + ${lang}_std_17 + ${lang}_std_20 + ) + _record_compiler_features(${lang} "" CMAKE_${lang}_COMPILE_FEATURES) + endmacro() + endif() +endmacro() |