Re: Same .m file: different results with different versions of Octave

[John W. Eaton]

On 17-Apr-2010, Judd Storrs wrote:

| I suspect that you're seeing differences in the C math libraries
| between the machines. This may be a bug in libc related to these
| (supposedly fixed) bugs from 2005:
| 
| http://lists.debian.org/debian-glibc/2005/09/msg00097.html
| https://bugzilla.redhat.com/show_bug.cgi?id=160759
| 
| FWIW the sample code testing libc fails on my machine. Perhaps it's
| time to file a bug report.

I think it is beyond the scope of the Octave project to fix bugs in
standard library functions.  So the right place to report the problem
is to the maintainers of the C and C++ libraries.  Or, if you think it
is worth making temporary workaround fixes that could appear sooner
that fixes in released versions of glibc/libstdc++ or your proprietary
vendor's corresponding libraries, then maybe gnulib is the right place
for doing that.  But so far, I think gnulib is focused on the C
library functions and tanh of complex values in Octave uses the
std::complex class from the standard C++ library, so it might take
some effort to add fixes for standard C++ library defects to gnulib.

jwe