KEEP_EXTENSION

From Get docs
Cmake/docs/3.21/prop sf/keep extension


KEEP_EXTENSION

Make the output file have the same extension as the source file.

If this property is set then the file extension of the output file will be the same as that of the source file. Normally the output file extension is computed based on the language of the source file, for example .cxx will go to a .o extension.

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https://cmake.org/cmake/help/v3.21/prop_sf/KEEP_EXTENSION.html