CLEAN_NO_CUSTOM
CLEAN_NO_CUSTOM
Set to true to tell Makefile Generators not to remove the outputs of custom commands for this directory during the make clean
operation. This is ignored on other generators because it is not possible to implement.
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© 2000–2011 Insight Software Consortium
Licensed under the BSD 3-clause License.
https://cmake.org/cmake/help/v3.5/prop_dir/CLEAN_NO_CUSTOM.html