[flang][OpenMP] Always set "openmp_flags" #138153
Merged
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Many OpenMP tests use "%openmp_flags" in the RUN line. In many OpenMP lit tests this variable is expected to at least have "-fopenmp" in it. However, in the lit config this variable was only given a value when the OpenMP runtime build was enabled.
If the runtime build was not enabled, %openmp_flags would expand to an empty string, and unless a lit test specifically used -fopenmp in the RUN line, OpenMP would be disabled.
This patch sets %openmp_flags to start with "-fopenmp" regardless of the build configuration.