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set(root "${CMAKE_CURRENT_SOURCE_DIR}/FindRootPathAndPrefixPathAreEqual")
set(CMAKE_FIND_ROOT_PATH "${root}")
set(CMAKE_PREFIX_PATH "${root}")
set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE "ONLY")
find_package(Foo
REQUIRED
CONFIG
NO_CMAKE_ENVIRONMENT_PATH
NO_SYSTEM_ENVIRONMENT_PATH
# Important because CMAKE_SYSTEM_PREFIX_PATH might contain "/" as a prefix
# And when "/" is rerooted onto the root above, the package is found even if
# CMAKE_PREFIX_PATH is empty. We want to ensure that we hit
# the CMAKE_FIND_ROOT_PATH == CMAKE_PREFIX_PATH code path.
NO_CMAKE_SYSTEM_PATH
)
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