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CompileFeatures: Record when AppleClang gained full CXX14 support

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Use the infrastructure added by commit 646fb1a646 (CompileFeatures:
memoize C++ compilers with full language level support, 2019-03-27) to
avoid using a `try_compile` to check for C++14 feature support when the
running compiler is known to have all features.
This commit is contained in:
Robert Maynard 2019-05-07 13:33:40 -04:00
parent fa077acba5
commit daad51c3b7
1 changed files with 2 additions and 0 deletions
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2
Modules/Compiler/AppleClang-CXX.cmake
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@ -17,10 +17,12 @@ endif()
if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 6.1)
set(CMAKE_CXX14_STANDARD_COMPILE_OPTION "-std=c++14")
set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "-std=gnu++14")
set(CMAKE_CXX14_STANDARD__HAS_FULL_SUPPORT ON)
elseif(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.1)
# AppleClang 5.0 knows this flag, but does not set a __cplusplus macro greater than 201103L
set(CMAKE_CXX14_STANDARD_COMPILE_OPTION "-std=c++1y")
set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "-std=gnu++1y")
set(CMAKE_CXX14_STANDARD__HAS_FULL_SUPPORT ON)
endif()
if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 6.1)