# CMAKE_IGNORE_PREFIX_PATH

Added in version 3.23.

Semicolon-separated list of search prefixes to be ignored by the `find_program()`, `find_library()`, `find_file()`, and `find_path()` commands. The prefixes are also ignored by the Config mode of the `find_package()` command (Module mode is unaffected). To ignore specific directories instead, see `CMAKE_IGNORE_PATH`.

Ignoring search locations can be 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, `CMAKE_IGNORE_PREFIX_PATH` is empty. It is intended to be set by the project or the end user.

See also the following variables:

- `CMAKE_IGNORE_PATH`

- `CMAKE_SYSTEM_IGNORE_PREFIX_PATH`

- `CMAKE_PREFIX_PATH`

- `CMAKE_LIBRARY_PATH`

- `CMAKE_INCLUDE_PATH`

- `CMAKE_PROGRAM_PATH`