[Octave-bug-tracker] [bug #44346] configure summary shows OpenMP enabled even if not detected

[John W. Eaton]

Follow-up Comment #2, bug #44346 (project octave):

I don't think we should add these flags directly to CFLAGS and CXXFLAGS as
those are supposed to default to "-g -O2" and be available for the user to
change.  Now if someone runs Make with CFLAGS=-g, won't they also remove the
openmp flags from CFLAGS?  That's probably not what they intend.  So they
probably should be added to AM_CFLAGS and AM_CXXFLAGS, which for historical
reasons are still defined from XTRA_CFLAGS and XTRA_CXXFLAGS.

Also, is it possible that the openmp flags would be different for the C and
C++ compilers?  If so, which should be passed to the linker?  I guess for us
it would normally be the CXXFLAGS version since we link most programs and
libraries with the C++ compiler.


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