[Numpy-discussion] Solaris Sparc build broken

[Michael Droettboom]

Thanks.  Behind that, however, it runs into this compiler shortcoming:

cc: build/src.solaris-2.8-sun4u-2.5/numpy/core/src/npymath/npy_math.c
"numpy/core/src/npymath/npy_math_private.h", line 229: invalid type for bit-field: manh
"numpy/core/src/npymath/npy_math_private.h", line 230: invalid type for bit-field: manl

It seems that Sun compilers (before Sun Studio 12, C compiler 5.9), 
don't support bit fields larger than 32-bits.  Welcome to my world :)

You can see a discussion of this here:

http://www.mail-archive.com/tools-discuss@opensolaris.org/msg02634.html

and the release notes for Sun C compiler 5.9 here:

http://docs.sun.com/source/820-4155/c.html

The best solution I've been able to dream up is to use a macro to get at 
the manh bitfield on these older compilers.  This fix does seem to pass 
the "test_umath.py" unit tests.  It's not as clean as the bit-field 
method, but it should be more portable.  You can see what I'm getting at 
in the attached (rough) patch.

Can you think of a better solution?  If this is *the* solution, we may 
want to add getters/setters for all the members (sign, exp, manl) and 
fix nextafterl in terms of those, just for consistency.

Cheers,
Mike

David Cournapeau wrote:
> On Wed, Nov 11, 2009 at 6:18 AM, Michael Droettboom <mdroe at stsci.edu> wrote:
>   
>> I don't know if your 'long double' detection code is complete yet, but I
>> thought I'd share the current build output on one of our Solaris
>> machines.  It looks like it may just be a typo difference between
>> 'IEEE_QUAD_BE' in long_double_representation() and 'IEEE_QUAD_16B_BE' in
>> setup.py, but I wanted to confirm.
>>     
>
> Yes, you're right - I don't have any machine with a 128 bits long
> double type, so I let the typo slipped.
>
> Could you try last revision (r7726) ?
>
> David
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-- 
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA