MSVC does not need a special flag to specify the standard. Using --std=c++14
produces a warning, but compilation succeeds, so the old code did mistakenly
choose --std=c++14 for MSVC.
if (CYGWIN)
set(CXX11_FLAG_CANDIDATES "--std=gnu++11")
else()
- set(CXX11_FLAG_CANDIDATES
- "--std=c++14"
- "--std=c++11"
- "--std=gnu++11"
- "--std=gnu++0x"
- )
+ if (MSVC)
+ # MSVC does not have a general C++11 flag, one can only switch off
+ # MS extensions with /Za in general or by extension with /Zc.
+ # Use an empty flag to ensure that CXX11_STD_REGEX is correctly set.
+ set(CXX11_FLAG_CANDIDATES "")
+ else()
+ set(CXX11_FLAG_CANDIDATES
+ "--std=c++14"
+ "--std=c++11"
+ "--std=gnu++11"
+ "--std=gnu++0x"
+ )
+ endif()
endif()
endif()