[SciPy-user] weave and compilers other than GCC 2.95?

eric jones eric at enthought.com
Tue Aug 27 17:38:40 CDT 2002


Doh! Hit the send button to soon on my last email...

Anyway, regaring blitz and MIPS.  Blitz++ is about as torturous of a C++
compiler test as there is.  It uses template expression and all kinds of
other gory tricks to make the compiler generate efficient code from
easy-to-read expressions.  I would be very surprised if the MIPS
compiler could handle anything at all with blitz code in it.

A possible solution for you is actually to build the blitz stuff with
gcc.  I have put a keyword argument in the inline() function to allow
you to select a compiler on the Windows platform.  If compiler='gcc' is
set, then mingw (gcc) is used instead of MSVC.  I don't think the
mechanism will work on Unix yet, but it is just a matter of "hooking it
up."  I expect using gcc on SGI would work fine.  My recollection is
that gcc compiled extensions work just fine with a MIPS compiled python.

eric

> -----Original Message-----
> From: scipy-user-admin at scipy.net [mailto:scipy-user-admin at scipy.net]
On
> Behalf Of eric jones
> Sent: Tuesday, August 27, 2002 5:29 PM
> To: scipy-user at scipy.net
> Subject: RE: [SciPy-user] weave and compilers other than GCC 2.95?
> 
> > > Hey Steve,
> > >
> > > Your in new territory here.  The only compilers I have used are
> > > gcc-2.95.3 and MSVC.
> >
> > OK.  The problem is less severe than I first feared.  I have managed
> > to kill most of the error messages by adding "typename" keywords,
> > changing templates like the following
> >
> >   template <class T> bool operator==(const SeqBase<T>::iterator&
left,
> > 				     const SeqBase<T>::iterator& right);
> >
> > to
> >
> >   template <class T> bool operator==(const typename
> SeqBase<T>::iterator&
> > left,
> > 				     const typename
> SeqBase<T>::iterator& right);
> >
> > I'm still trying to figure out what to do about
> > random_access_iterator, apparently a non-standard STL class that can
> > be replaced somehow with std::iterator.
> 
> No clue on this.
> 
> >
> > Also: the code includes the deprecated <strstream> header.  At the
> > moment, this only elicits a warning that I'm ignoring.
> 
> OK.  If this is in CXX, it'll automatically be gone in the new
version.
> If it is injected by weave, we'll remove it for the new version.
> 
> >
> >
> > > The second issue is that distutils doesn't automatically handle
> building
> > > C++ libraries.  Weave uses a hack that replaces gcc with g++ if
gnu
> is
> > > used.
> >
> > Ah, I didn't notice that.  I thought you were relying on the fact
that
> > SGI "cc" (like gcc) will detect the language based on the input file
> > extension (.c or .cxx, etc).  I was actually rather surprised to
learn
> > that SGI's compiler does that.
> 
> Right gcc does also.  The problem comes at the link step. Using gcc to
> link doesn't include the stdc++ (or equivalent) library. Linking with
> g++ does.
> 
> >
> > > g++ links in the correct libraries for cout, etc. while gcc
> > > doesn't.  I'm betting your hitting a similar problem.
> >
> > The messages about "cout" were my own fault (blush) -- they came
from
> > the code I was trying to weave.
> 
> Ahh.  I'm guessing you needed std::cout.
> 
> >
> > > One temporary fix
> > > might be to try libraries=['stdc++'] as an inline() keyword
> argument.
> > >
> > > >   #error directive:  This header file requires the -LANG:std
> option
> > >
> > > Yikes!  This looks like something we'll just have to hard code
when
> MIPS
> > > is detected.  Or maybe if we build with the MIPS c++ compiler (is
it
> > > different than the c compiler on this platform?) this flag will
> > > automatically be set.  I can't imagine a C++ compiler having to
have
> a
> > > flag set to use the std namespace files.
> >
> > Guess again.  :-(  The MIPS C++ compiler is named "CC"; but yes, you
> > need -LANG:std to get something closer to current standards.  At
least
> > with MIPSpro 7.30 compilers (which, admittedly are a few years old).
> 
> I think that is the latest though, correct?
> 
> >
> >
> > > With the change to SCXX, inline() should theoretically
> > > work everywhere.  blitz() on the other hand... I think that is
still
> > > relegated to the world of gcc.
> >
> > Uh, oh.  What about inline( ... type_converters = converters.blitz
> ...)?
> 
> I'm betting there is bad news here.  Blitz++ works
> >
> >
> > -Steve
> > _______________________________________________
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> > SciPy-user at scipy.net
> > http://www.scipy.net/mailman/listinfo/scipy-user
> 
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