[Python-bugs-list] [ python-Bugs-532618 ] Build python fails after fpectl

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Bugs item #532618, was opened at 2002-03-20 13:09
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Category: Distutils
Group: Python 2.2.1 candidate
Status: Open
Resolution: Duplicate
Priority: 5
Submitted By: Neal Norwitz (nnorwitz)
Assigned to: Neal Norwitz (nnorwitz)
Summary: Build python fails after fpectl

Initial Comment:
This is when using purify, fpectl.so fails to build.
After this an exception is raised in distutils.

Here's some of the interesting bits.

The attached file should have everyhing:

Instrumenting: fpectl.so Done.
WARNING: removing "fpectl" since importing it failed
Traceback (most recent call last):
  File "./setup.py", line 796, in ?
    main()
  File "./setup.py", line 790, in main
    scripts = ['Tools/scripts/pydoc']
...
  File
"/space/purify/python/python/dist/2.2/Lib/distutils/cmd.py",
line 107, in __getattr__
    raise AttributeError, attr
AttributeError: _built_objects

In order to get this far, I also had to include this
patch to Python/dynload_shlib.c:93:


<    PyErr_SetString(PyExc_ImportError, dlerror());
---
>    const char* err = dlerror();
>    if (! err)
>        err = "";
>    PyErr_SetString(PyExc_ImportError, err);

This patch should not be applied.  It's just necessary
for purify, AFAIK.

This problem can be duplicated outside of purify with
the following steps (on Linux):

    configure
    make
    # stop make after fpectl.o
    chmod 000 build/*/fpe*
    make
    # exception should be raised

Purify version is 2002a.06.00 Proto 38 on 
Solaris 8/Sparc.


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>Comment By: Neal Norwitz (nnorwitz)
Date: 2002-03-20 20:06

Message:
Logged In: YES 
user_id=33168

I don't have the directory /opt/SUNWspro.
I did a:  find /opt -name '*sunmath*' -print
and got nothing.  Also looked for *ieee*,
nm /usr/lib/lib*.a also yields nothing.

But there is fpsetmask() now.  And there's 
#include <floatingpoint.h> or <sys/ieeefp.h>
I think the code needs to be rewritten, but I'm
not sure what to do.  I think the whole code in
#ifdef sun, should be something like this (for solaris 8 only):

    #include <floatingpoint.h>
    sigfpe(FPE_FLTOVF, handler);
    sigfpe(FPE_FLTDIV, handler);
    sigfpe(FPE_FLTUBV, handler);

or

    #include <ieeefp.h>
    fpsetmask(FP_X_INV | FP_X_OFL | FP_X_DZ);   
PyOS_setsig(SIGFPE, handler);

But that's a guess from the man pages.
Are there any tests for fpectl?

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Comment By: Nobody/Anonymous (nobody)
Date: 2002-03-20 19:08

Message:
Logged In: NO 

for me, -lsunmath is in /opt/SUNWspro/lib. I don't
believe we have the sun compilers.

(Anthony here - stupid sf keeps telling me to log back
in)

----------------------------------------------------------------------

Comment By: Neal Norwitz (nnorwitz)
Date: 2002-03-20 14:07

Message:
Logged In: YES 
user_id=33168

Actually the bug report was more about the distutils
problem.  It should not be specific to fpectl, although
that was the problem when I noticed it.

Distutils will presumably always raise an exception if it
cannot open a dynamic library.

Also, in 530163 there is mention of -lsunmath, 
I cannot find any sunmath or ieee library on solaris.
The other report was for solaris 7, where this is solaris 8.
There is an ieee_handlers in -lc.

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Comment By: Martin v. Löwis (loewis)
Date: 2002-03-20 13:45

Message:
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I got crashes from loading fpectl.so, too. It seems to be
related to #530163: does the problem go away if you link
with -lsunmath?

This appears to be a duplicate of #472642, so I'm resolving
it tentatively as such. Unless further information is
expected, I recommend to close this report.



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