VS: Avoid VS 2017 toolset default use of /FC flag (!2306) · Merge requests · CMake / CMake

Brad King requested to merge brad.king/cmake:vs2017-no-default-FC into master Aug 23, 2018

VS 2017 toolsets now use this flag by default if UseFullPaths is not explicitly set to false in the .vcxproj file. Since there is no negative form of this flag there is no way for projects to turn it off through our flag map. Also, the Makefile and Ninja generators do not add this flag unless it is explicitly specified by the project.

Teach our generator to set UseFullPaths to false in VS 2017 unless the project or use has explicitly specified /FC.

Fixes: #18261 (closed)

VS: Avoid VS 2017 toolset default use of /FC flag

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