diff options
Diffstat (limited to 'share/cmake-3.17/Modules/CMakeBackwardCompatibilityCXX.cmake')
| -rw-r--r-- | share/cmake-3.17/Modules/CMakeBackwardCompatibilityCXX.cmake | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/share/cmake-3.17/Modules/CMakeBackwardCompatibilityCXX.cmake b/share/cmake-3.17/Modules/CMakeBackwardCompatibilityCXX.cmake new file mode 100644 index 0000000..02744a9 --- /dev/null +++ b/share/cmake-3.17/Modules/CMakeBackwardCompatibilityCXX.cmake @@ -0,0 +1,49 @@ +# Distributed under the OSI-approved BSD 3-Clause License. See accompanying +# file Copyright.txt or https://cmake.org/licensing for details. + +#[=======================================================================[.rst: +CMakeBackwardCompatibilityCXX +----------------------------- + +define a bunch of backwards compatibility variables + +:: + + CMAKE_ANSI_CXXFLAGS - flag for ansi c++ + CMAKE_HAS_ANSI_STRING_STREAM - has <strstream> + include(TestForANSIStreamHeaders) + include(CheckIncludeFileCXX) + include(TestForSTDNamespace) + include(TestForANSIForScope) +#]=======================================================================] + +if(NOT CMAKE_SKIP_COMPATIBILITY_TESTS) + # check for some ANSI flags in the CXX compiler if it is not gnu + if(NOT CMAKE_COMPILER_IS_GNUCXX) + include(TestCXXAcceptsFlag) + set(CMAKE_TRY_ANSI_CXX_FLAGS "") + if(CMAKE_SYSTEM_NAME MATCHES "OSF") + set(CMAKE_TRY_ANSI_CXX_FLAGS "-std strict_ansi -nopure_cname") + endif() + # if CMAKE_TRY_ANSI_CXX_FLAGS has something in it, see + # if the compiler accepts it + if(NOT CMAKE_TRY_ANSI_CXX_FLAGS STREQUAL "") + CHECK_CXX_ACCEPTS_FLAG(${CMAKE_TRY_ANSI_CXX_FLAGS} CMAKE_CXX_ACCEPTS_FLAGS) + # if the compiler liked the flag then set CMAKE_ANSI_CXXFLAGS + # to the flag + if(CMAKE_CXX_ACCEPTS_FLAGS) + set(CMAKE_ANSI_CXXFLAGS ${CMAKE_TRY_ANSI_CXX_FLAGS} CACHE INTERNAL + "What flags are required by the c++ compiler to make it ansi." ) + endif() + endif() + endif() + set(CMAKE_CXX_FLAGS_SAVE ${CMAKE_CXX_FLAGS}) + string(APPEND CMAKE_CXX_FLAGS " ${CMAKE_ANSI_CXXFLAGS}") + include(TestForANSIStreamHeaders) + include(CheckIncludeFileCXX) + include(TestForSTDNamespace) + include(TestForANSIForScope) + include(TestForSSTREAM) + set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS_SAVE}") +endif() + |