> 2011-10-09 Bruno Haible
>
> copysign: Provide replacement.
While at it, I also added modules for 'copysignf' and 'copysignl'.
2011-10-09 Bruno Haible
New module 'copysignf'.
* lib/math.in.h (copysignf): New declarati
MSVC 9 does not have the copysign() function. Here's the workaround.
2011-10-09 Bruno Haible
copysign: Provide replacement.
* lib/math.in.h (copysign): New declaration.
* lib/copysign.c: New file.
* m4/copysign.m4: New file.
* m4/math_h.m4 (gl_M
* modules/copysign-tests (Files): Add minus-zero.h.
* tests/test-copysign.c (main): Also test zeros.
Signed-off-by: Eric Blake
---
I was about to fix strtod to use copysign to work around the icc
bug; the first step is to strengthen the test to prove that it
will work with icc. I've t
On glibc systems, use of copysign() does not require linking with libm.
This patch ensures that COPYSIGN_LIBM gets set to empty rather than to -lm.
2010-07-31 Bruno Haible
copysign: Does not require -lm on glibc systems.
* modules/copysign (configure.ac): Use gl_MATHFUNC, not
Eric Blake wrote:
> > $ ./show-portability copysignf
> > libcmacosx-10.3
> > libcygwin cygwin
> > libmcygwin
>
> The show-portability script output is a bit confusing for cygwin. Yes,
> the fuction copysignf is provided by linking with cygwin1.dll. But o
Paul Eggert wrote:
> Here's a proposed patch to 'signbit' to have it use 'copysign' if
> available.
I'm applying this patch instead, that takes into account the previous
discussions.
> In Solaris, copysign is in -lm. If we can't assume -lm then
Hello Paul,
> >> Normally the 'signbit' implementation relies on undefined behavior, as
> >> it accesses the "wrong" member of a union
> >
> > This is the point of a 'union'. The code is not casting pointers; it is
> > using 'union's for the purpose they were defined for.
>
> Nevertheless, the be
Paul Eggert wrote:
> > Globally, I think this is backwards: 'copysign' is a more general function
> > than 'signbit',
>
> That's true in general but this is a special case. 'copysign' has
> been standardized since 1985, is well understoo
Bruno Haible <[EMAIL PROTECTED]> writes:
> Globally, I think this is backwards: 'copysign' is a more general function
> than 'signbit',
That's true in general but this is a special case. 'copysign' has
been standardized since 1985, is well under
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According to Bruno Haible on 4/7/2007 4:23 AM:
> $ ./show-portability copysignf
> libcmacosx-10.3
> libcygwin cygwin
> libmcygwin
The show-portability script output is a bit confusing for cygwin. Yes,
the fuc
Hi Paul,
> Here's a proposed patch to 'signbit' to have it use 'copysign' if
> available.
Globally, I think this is backwards: 'copysign' is a more general function
than 'signbit', since it takes 2 arguments. And the usual way to return
a boole
Here's a proposed patch to 'signbit' to have it use 'copysign' if
available.
Normally the 'signbit' implementation relies on undefined behavior, as
it accesses the "wrong" member of a union; but when copysign is
available the implementation can use co
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