Commit 62930253 authored by Committed by Brad KingBrowse files
FindCygwin: Fix regression when CYGWIN_INSTALL_PATH is already set
The change in commit v3.9.0-rc1~54^2 (FindCygwin: Use find_program instead of find_path, 2017-05-18) broke cases when `CYGWIN_INSTALL_PATH` is already set, e.g. on the command-line or by an earlier call to `find_package(Cygwin)`. Since `find_program` now finds the actual `cygwin.bat` file, use a separate cache entry to save the location and then compute `CYGWIN_INSTALL_PATH`. If `CYGWIN_INSTALL_PATH` is already set, use that to avoid `find_program` having to search.
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