I think this is a sort of different beast. You could check for gslcblas and even pass -lgslcblas as a compile flag, in fact that is what is going on. The problem is GSL needs BLAS but does not call it directly from the object file, and the --as-needed doesnt check for symbols recursively, so doesnt link it, even if you specifically pass -lgslcblas as a parameter. I suppose one option is to directly link the gr-wavelet library to CBLAS, which honestly I thought was already happening.
Tim On Wed, Jun 26, 2013 at 2:55 PM, Michael Dickens <m...@alum.mit.edu> wrote: > Regarding commit c0b3ce38db0eaaca05fe2f45827fcf6c9184b72b "wavelet: fix > for -lgslcblas getting stripped out of the link flags due to > -Wl,--as-needed default on newer gcc toolchains, results in missing blas > symbols at runtime", as well as other assumptions being made about GCC: > > <soapbox> > > Just because the compiler is GCC does not mean it will accept the flag > being passed to it, nor that it is guaranteed to provide specific > functionality if >= a specific version. Maybe this works on Linux, but it > does not on Mac OS X using either Apple's or MacPorts' GCC (4.2, 4.6, 4.7). > So, the above "-Wl,--no-as-needed" does not work, nor does the "xgetbv" > instruction, because all versions of GCC use Apple's assembler (which does > not support these features). > > Clang as provided by Xcode or MacPorts does -not- use Apple's assembler, > which means it should be multi-OS compatible for flags and instructions -- > but: > > The best way to check for a feature (compiler flag, or specific > instruction) is to actually test for it, just like we do for most other > compiler flags, headers, and many functions (both OS-provided and other > dependencies). > > </soapbox> > > Thanks for listening. I'm patching the MacPorts install of GNU Radio to > remove this commit until a better solution is found. - MLD > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
_______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
