[Numpy-discussion] Building NumPy on Mac OS X without Apple GCC

[Joshua Lippai]

> Joshua Lippai wrote:
> > I updated my GCC to a more recent version a day ago, since Apple's
> > Xcode Tools only provide GCC 4.0 and the current release of GNU's GCC
> > is 4.2. I successfully achieved this, but now I run into a problem
> > when trying to build NumPy:
> >
> > gcc: unrecognized option '-no-cpp-precomp'
> > cc1: error: unrecognized command line option "-arch"
> > cc1: error: unrecognized command line option "-arch"
> > cc1: error: unrecognized command line option "-Wno-long-double"
> > gcc: unrecognized option '-no-cpp-precomp'
> > cc1: error: unrecognized command line option "-arch"
> > cc1: error: unrecognized command line option "-arch"
> > cc1: error: unrecognized command line option "-Wno-long-double"
> >
> >
> > Upon investigation into the matter, I found out that these options
> > (no-cpp-precomp and Wno-long-double) are only valid in Apple's GCC and
> > not the regular GNU release. Yet it seems NumPy automatically assumes
> > Apple's GCC is being used when it realizes the target is OS X. Is
> > there a way around this, or at least some way to specify Apple's GCC?
> > NumPy is the only package I've tried building so far that has a
> > problem with this.
>
> I'm surprised that you've built other Python extension modules because numpy
> does not add these flags; Python does. Python extensions should be built with
> the same compiler that Python itself was built with. If you are using the binary
> distribution from www.python.org, you should use Apple's gcc, not a different one.
>
> --
> Robert Kern
>
> "I have come to believe that the whole world is an enigma, a harmless enigma
>  that is made terrible by our own mad attempt to interpret it as though it had
>  an underlying truth."
>   -- Umberto Eco
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>
Thanks for the reply. Well, I built my Python stuff, including NumPy
previously, before I changed to the higher GCC version. Do you know if
there's an option I can toggle that will specify Apple's GCC to be
used?