Re: [Gretl-devel] Problem compiling and running Gretl CVS in Mac OS X 10.6

On 21-03-2010, at 18:47, Allin Cottrell wrote: > > On Sun, 21 Mar 2010, Berend Hasselman wrote: > ..... >> However, running my bold of cvs gretl results in the following >> error on startup (and gretl quits): >> >> ----------------------------------------------------------------------------------------------- >> dyld: lazy symbol binding failed: Symbol not found: _omp_get_wtime >> Referenced from: /Users/berendhasselman/tmp/gretl-image/Gretl.app/Contents/Resources/bin/../lib/libgretl-1.0.0.dylib >> Expected in: flat namespace >> >> dyld: Symbol not found: _omp_get_wtime >> Referenced from: /Users/berendhasselman/tmp/gretl-image/Gretl.app/Contents/Resources/bin/../lib/libgretl-1.0.0.dylib >> Expected in: flat namespace >> >> Trace/BPT trap >> ----------------------------------------------------------------------------------------------- >> >> I have also tried the option --disable-openmp of configure. >> Same result. >> This must have something to do with the recent changes wrt openmp. >> >> What's going on and what could be done about this (if at all possible)? > > The use of omp_get_wtime(), in gretl_utils.c, is conditional on > _OPENMP being defined. So it seems there are two things to look at > here: > > 1. At present, in CVS, openmp is used if the configure check for > its presence goes OK. In that case the compiler flag -fopenmp will > be added, in consequence _OPENMP should be defined, and the > symbol omp_get_wtime will be required. With gcc on Linux this > is handled automatically: the program is linked against libgomp. > Apparently it's not handled automatically on OS X; we'll have to > find out what's needed. It seems to work for a small and simple program.

> 2. If you tell configure to "--disable-openmp", then it seems to > me that the flag -fopenmp should not be added, _OPENMP should > therefore not be defined, and so the symbol omp_get_wtime should > not be required. What's going wrong with that? Can you check > lib/Makefile after configuring with --disable-openmp? There will > be a line > > OMP_OPT = > > and it should look as above, with nothing to the right of the > equals sign. I checked and indeed it looks like OMP_OPT = with nothing after the = sign. I have recompiled Gretl cvs (again) with --disable-openmp and created a Gretl.app. Gretl.app now just starts and runs. (as it should and as expected) I haven't got a clue as to what went wrong in my previous attempt. Well at least disable-openmp just works:-)

Question: what openmp option do you use for gretl cvs for the mac?