[CMake] How to detect MSVC 2015 update 3 (= presence of /fpermissive-)

[René J. V. Bertin]

Volker Enderlein wrote:

Hi,

Thanks, that helps. With there is maybe something to learn from the CMake 
sources, too.

R.

> Hello,
> 
> according to https://sourceforge.net/p/predef/wiki/Compilers/ you could
> check with
> 
> check_cxx_source_compiles("
>      #if defined (_MSC_VER) && (_MSC_VER == 1900) && (_MSC_FULL_VER ==
> 190024210)
>      #else
>        #error compiler is not MSVC Update3
>      #endif
>      int main() {
>          return 0;
>      }
> " MSVC_UPDATE3_FOUND)
> 
> for the requested feature.
> 
> HTH, Cheers, Volker
> 
> 
> Am 15/05/2017 um 14:56 schrieb René J.V. Bertin:
>> Hello,
>>
>> A question that will hopefully have a quick/easy answer:
>>
>> I'd like to detect when the MSVC /fpermissive- (yes, that's a dash at the
>> end) can be used instead of /Za . I know that a later update bumped the
>> version to 14.0.25422.01 and thus undoubtedly _MSC_FULL_VER== 1402542201 in C
>> code so I could assume everyone keeps installs their updates and use that
>> value.
>>
>> But what does this translate to in CMake code (MSVC_VERSION)? Probably not
>> just 1903 I presume?
>>
>> Thanks,
>> René
>