[CMake] Correct way of using CMAKE_FIND_ROOT_PATH_MODE_*?

[Chaoren Lin]

Hi,

the documentation regarding cross-compiling
<https://cmake.org/cmake/help/v3.6/manual/cmake-toolchains.7.html#cross-compiling>
says
that CMAKE_FIND_ROOT_PATH_MODE_* are usually set to ONLY to prevent
searching for libraries on the host. But this also prevents finding
libraries via absolute path or relative path to the project.

Is there a way to prevent searching host sysroot (/usr/lib, /usr/include,
etc), while still allowing find_library via absolute paths or paths
relative to the project?

Thanks.
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