Find perl
this module looks for Perl
PERL_EXECUTABLE - the full path to perl PERL_FOUND - If false, don't attempt to use perl. PERL_VERSION_STRING - version of perl found (since CMake 2.8.8)
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© 2000–2011 Insight Software Consortium
Licensed under the BSD 3-clause License.
https://cmake.org/cmake/help/v3.7/module/FindPerl.html