Semicolon-separated list of directories to be ignored by the
find_path() commands. This is useful in cross-compiling environments where some system directories contain incompatible but possibly linkable libraries. For example, on cross-compiled cluster environments, this allows a user to ignore directories containing libraries meant for the front-end machine.
By default this contains a list of directories containing incompatible binaries for the host system. See the
CMAKE_IGNORE_PATH variable that is intended to be set by the project.
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