Environment variable used by CMake to detect Visual C++ compiler tools for Ninja -


i have mingw64 gcc 6.3.0 (always in path) , visual c++ compiler tools visual studio 2017 rtm (not in path).

if run cmake . -g "mingw makefiles", gcc 6.3.0 selected.

if run cmake . -g "ninja", gcc 6.3.0 selected.

my visual c++ compiler tools none standard, keep parts need , delete rest (like msbuild, ide etc.). use own batch script set path, include , lib (works fine).

if run batch script , run cmake ., msvc selected , build nmake.

with same environment, cmake . -g "ninja", gcc 6.3.0 selected instead of msvc.

so question is, how tell cmake want use msvc + ninja rather gcc + ninja when both in path? environment variable should set?

you can use inverted approach , exclude compilers don't want cmake_ignore_path. takes list of paths ignore, aware needs exact string match. advantage can declare directly command line.

so did take path compiler found "not taken" cmake_ignore_path.

and on system there 3 gcc compilers in path (just make sure start empty binary output directory each try):

> cmake -g"ninja" .. ... -- check working c compiler: c:/mingw/bin/cc.exe ... 
> cmake -dcmake_ignore_path="c:/mingw/bin" -g"ninja" .. ... -- check working c compiler: c:/strawberry/c/bin/gcc.exe ... 
> cmake -dcmake_ignore_path="c:/mingw/bin;c:/strawberry/c/bin" -g"ninja" .. ... -- check working c compiler: c:/program files (x86)/llvm/bin/clang.exe ... 
> cmake -dcmake_ignore_path="c:/mingw/bin;c:/strawberry/c/bin;c:/program files (x86)/llvm/bin" -g"ninja" .. ... -- check working c compiler: c:/program files (x86)/microsoft visual studio 14.0/vc/bin/cl.exe ...

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