CMAKE_VERBOSE_MAKEFILE
Enable verbose output from Makefile builds.
This variable is a cache entry initialized (to FALSE) by the project() command. Users may enable the option in their local build tree to get more verbose output from Makefile builds and show each command line as it is launched.
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Licensed under the BSD 3-clause License.
https://cmake.org/cmake/help/v3.15/variable/CMAKE_VERBOSE_MAKEFILE.html