CMAKE_COMPILER_IS_GNUCXX
From Get docs
Cmake/docs/3.21/variable/cmake compiler is gnucxx
CMAKE_COMPILER_IS_GNUCXX
New in version 3.7.
True if the C++ (CXX
) compiler is GNU. Use CMAKE_CXX_COMPILER_ID instead.
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Licensed under the BSD 3-clause License.
https://cmake.org/cmake/help/v3.21/variable/CMAKE_COMPILER_IS_GNUCXX.html