Follow-up Comment #4, sr #110353 (group autoconf): Yeah, I'm not surprised. This is the list of options AC_OPENMP tries:
-fopenmp
-xopenmp
-openmp
-mp
-omp
-qsmp=omp
-homp
-Popenmp
--openmp
Because of the way conglomerated short options work, all but three of those
are at risk of being interpreted as -o penmp or -o mp, possibly with some
other junk option, by _any_ compiler that _doesn't_ recognize the entire token
as a long option. There's nothing we can do to prevent that.
If the version of AC_OPENMP _in Autoconf proper_ -- not a clone from the
autoconf archive -- can, under some circumstances, either leave a file named
"penmp" or "mp" behind after execution (regardless of the outcome of the
test), or cause an existing file with one of those names to get destroyed,
please file a new bug report about that, but that's the best we can do.
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