Заплатка для версий CMake < 3.8.0

This commit is contained in:
Andrei Astafev 2020-12-23 09:36:24 +03:00
parent a0cc72077c
commit 0f5a90952b

View File

@ -36,10 +36,14 @@ set(CMAKE_CXX_STANDARD_REQUIRED YES)
check_cxx_compiler_flag(-std=c++17 HAVE_FLAG_STD_CXX17) check_cxx_compiler_flag(-std=c++17 HAVE_FLAG_STD_CXX17)
if(HAVE_FLAG_STD_CXX17) if(HAVE_FLAG_STD_CXX17)
set(CMAKE_CXX_STANDARD 17) if(${CMAKE_VERSION} VERSION_LESS "3.8.0")
check_cxx_compiler_flag(-std=gnu++17 HAVE_FLAG_STD_GNUXX17) check_enable_cxx_flag(-std=c++17)
if(HAVE_FLAG_STD_GNUXX17) else()
set(CMAKE_CXX_EXTENSIONS YES) set(CMAKE_CXX_STANDARD 17)
check_cxx_compiler_flag(-std=gnu++17 HAVE_FLAG_STD_GNUXX17)
if(HAVE_FLAG_STD_GNUXX17)
set(CMAKE_CXX_EXTENSIONS YES)
endif()
endif() endif()
else() else()
check_cxx_compiler_flag(-std=c++14 HAVE_FLAG_STD_CXX14) check_cxx_compiler_flag(-std=c++14 HAVE_FLAG_STD_CXX14)