[Numpy-discussion] Compiling NumPy on 64 bit Solaris 10 sparc)

[Chris LeBlanc]

Hi,

Firstly thanks to everyone that has helped bring NumPy to the point it
is today. Its an excellent bit of software.

I've recently managed to get NumPy to compile on a 64 bit Solaris 10
(sparc) machine. We've embedded 64 bit Python in some of our C code
using the Python C-API, and therefore require a 64 bit version of
NumPy.

I had to use a bit of a hack to get NumPy to compile in 64 bit mode,
and I'm just wondering if there's a more elegant way of doing it?

If I set CFLAGS to "-m64 -xcode=pic32", and CC to "/usr/bin/cc", it
will raise the following error:

... snipped most of backtrace ...
File "/home/leblanc/source/numpy/numpy/distutils/command/build_src.py",
line 385, in generate_sources
source = func(extension, build_dir)
File "numpy/core/setup.py", line 675, in get_mathlib_info
raise RuntimeError("Broken toolchain: cannot link a simple C program")

However, if I create a wrapper script and set CC to the path of the
wrapper, then it will build normally and create a NumPy module I can
use from the 64 bit version of Python installed on the system
(/usr/bin/sparcv9/python). Here's the wrapper:

#!/bin/sh
/usr/bin/cc -m64 -xcode=pic32 $*

I did a bit of googling and couldn't find much information on this
issue (which is why I wanted to post this message, so others could
find it). I'm satisfied with the results, but wondering if there's a
better way to do it.

Cheers,
Chris

Chris LeBlanc
GNS Science
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[Ralf Gommers]

It's because CFLAGS does not append to but overrides flags. Your wrapper script manages to append flags.

Does the patch in http://projects.scipy.org/numpy/ticket/1382 work for you? If so it can be applied I think.

Cheers,
Ralf

[Chris LeBlanc]

Hi Ralf,

Thanks for the information. I'll have a look at it, and see if it
solves the issue.

Cheers,
Chris

[Dr. David Kirkby]

Ralf, looking at that patch, it is for the Sun compiler and will not work with gcc.

However, I did find a very simple solution to this.

CC="gcc -m64"
export CC

then Numpy builds fine. (I also had CFLAGS set too, though I'm not sure if
that's really necessary if CC is set).

Dave

[Dr. David Kirkby]

Chris, I just repied to your post, thinking it was one I had made, since I did
post on a very similar topic - building numpy on 64-bit Solaris!

The solution which worked for me was

CC="gcc -m64"
export CC

I guess if you use the Sun compiler, it will be

CC="cc -m64"
export CC

Dave