[Bug 223678] devel/cmake: find_package(OpenMP) doesn't find the openmp package

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=223678

Christian Pfeiffer <cpfeiffer at live.de> changed:

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                 CC|                            |cpfeiffer at live.de

--- Comment #7 from Christian Pfeiffer <cpfeiffer at live.de> ---
(In reply to Adriaan de Groot from comment #6)

Does clang -fopenmp itself work, or do you also need to pass both $LOCALBASE as
include and link path for that flag to work at all?

FindOpenMP will not attempt anything beyond invoking the compiler with the
given CMAKE_<LANG>_FLAGS and the flags to try out, e.g. -fopenmp. If you
install the OpenMP headers / libraries in a different location than the
compiler's default search paths, any attempt to compile a source file will fail
due to the lack of OpenMP library and/or header.

Note that FindOpenMP currently has no OpenMP_<LANG>_INCLUDE_DIR variable due to
this assumption.

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