Re: CVS commit: src/lib/libc/compat/gen

[Matthias Drochner <M.Drochner%fz-juelich.de@localhost>]

[ldexp/frexp]
christos%astron.com@localhost said:
> You should comment on the PR that started all this in the first place
> (different results).

I haven't found a PR to the topic in gnats. Only a commit
message about frexp(-0) not being handled correctly.
Generally I've kept the libc versions up-to-date if any
issues with the libm versions came up, so there are
hopefully no significant differences in bevavior.
I doubt that any real-life software which uses these
functions doesn't link against libm, so the libc code
exists only for formal binary compatibility. (I've recently
built a system with BUILDCOLD set which removes the
compat stuff from libc and everything worked well.
Almost everything... A C# program from pkgsrc stopped
working - the "mono" runtime dlopen(3)s some libc functions
directly and misses the RENAMEs apparently.)

Btw, even with the reachovers the libc and libm versions were
not identical - libc used the C version of scalbn() while
libm uses the i387 asm one (which I've just RENAMEd for
namespace sanity).

best regards
Matthias



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