Modules/Compiler/MSVC-CXX.cmake

   1 # Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
   2 # file Copyright.txt or https://cmake.org/licensing for details.
   3
   4 include(Compiler/MSVC)
   5 __compiler_msvc(CXX)
   6
   7 include(Compiler/CMakeCommonCompilerMacros)
   8
   9 if ((CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 19.0.24215.1 AND
  10      CMAKE_CXX_COMPILER_VERSION VERSION_LESS 19.10) OR
  11    CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 19.10.25017)
  12
  13   # VS 2015 Update 3 and above support language standard level flags,
  14   # with the default and minimum level being C++14.
  15   set(CMAKE_CXX98_STANDARD_COMPILE_OPTION "")
  16   set(CMAKE_CXX98_EXTENSION_COMPILE_OPTION "")
  17   set(CMAKE_CXX98_STANDARD__HAS_FULL_SUPPORT ON)
  18   set(CMAKE_CXX11_STANDARD_COMPILE_OPTION "")
  19   set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "")
  20   set(CMAKE_CXX14_STANDARD_COMPILE_OPTION "-std:c++14")
  21   set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "-std:c++14")
  22
  23   if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 19.11.25505)
  24     set(CMAKE_CXX11_STANDARD__HAS_FULL_SUPPORT ON)
  25     set(CMAKE_CXX14_STANDARD__HAS_FULL_SUPPORT ON)
  26     set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "-std:c++17")
  27     set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "-std:c++17")
  28   else()
  29     set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "-std:c++latest")
  30     set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "-std:c++latest")
  31   endif()
  32
  33   if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 19.29.30129)
  34     set(CMAKE_CXX20_STANDARD_COMPILE_OPTION "-std:c++20")
  35     set(CMAKE_CXX20_EXTENSION_COMPILE_OPTION "-std:c++20")
  36     set(CMAKE_CXX23_STANDARD_COMPILE_OPTION "-std:c++latest")
  37     set(CMAKE_CXX23_EXTENSION_COMPILE_OPTION "-std:c++latest")
  38   elseif(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 19.12.25835)
  39     set(CMAKE_CXX20_STANDARD_COMPILE_OPTION "-std:c++latest")
  40     set(CMAKE_CXX20_EXTENSION_COMPILE_OPTION "-std:c++latest")
  41   endif()
  42
  43   __compiler_check_default_language_standard(CXX 19.0 14)
  44
  45 elseif (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 16.0)
  46   # MSVC has no specific options to set language standards, but set them as
  47   # empty strings anyways so the feature test infrastructure can at least check
  48   # to see if they are defined.
  49   set(CMAKE_CXX98_STANDARD_COMPILE_OPTION "")
  50   set(CMAKE_CXX98_EXTENSION_COMPILE_OPTION "")
  51   set(CMAKE_CXX11_STANDARD_COMPILE_OPTION "")
  52   set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "")
  53   set(CMAKE_CXX14_STANDARD_COMPILE_OPTION "")
  54   set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "")
  55   set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "")
  56   set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "")
  57   set(CMAKE_CXX20_STANDARD_COMPILE_OPTION "")
  58   set(CMAKE_CXX20_EXTENSION_COMPILE_OPTION "")
  59
  60   # There is no meaningful default for this
  61   set(CMAKE_CXX_STANDARD_DEFAULT "")
  62
  63   # There are no compiler modes so we only need to test features once.
  64   # Override the default macro for this special case.  Pretend that
  65   # all language standards are available so that at least compilation
  66   # can be attempted.
  67   macro(cmake_record_cxx_compile_features)
  68     list(APPEND CMAKE_CXX_COMPILE_FEATURES
  69       cxx_std_98
  70       cxx_std_11
  71       cxx_std_14
  72       cxx_std_17
  73       cxx_std_20
  74       cxx_std_23
  75       cxx_std_26
  76       )
  77     _record_compiler_features(CXX "" CMAKE_CXX_COMPILE_FEATURES)
  78   endmacro()
  79 endif()
  80
  81 if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "19.34")
  82   set(CMAKE_EXPERIMENTAL_CXX_MODULE_DYNDEP 1)
  83   string(CONCAT CMAKE_EXPERIMENTAL_CXX_SCANDEP_SOURCE
  84     "<CMAKE_CXX_COMPILER> <DEFINES> <INCLUDES> <FLAGS> <SOURCE> -nologo -TP"
  85     " -showIncludes"
  86     " -scanDependencies <DYNDEP_FILE>"
  87     " -Fo<OBJECT>")
  88   set(CMAKE_EXPERIMENTAL_CXX_SCANDEP_DEPFILE_FORMAT "msvc")
  89   set(CMAKE_EXPERIMENTAL_CXX_MODULE_MAP_FORMAT "msvc")
  90   set(CMAKE_EXPERIMENTAL_CXX_MODULE_MAP_FLAG "@<MODULE_MAP_FILE>")
  91 endif ()