Re: argz.m4: error_t handling wrt argz.h and errno.h

[Ralf Wildenhues]

* Mike Frysinger wrote on Wed, Feb 13, 2008 at 07:26:16PM CET:
> On Wednesday 13 February 2008, Ralf Wildenhues wrote:
> > * Mike Frysinger wrote on Wed, Feb 13, 2008 at 05:38:05AM CET:
> > > the argz.m4 header checks to see if error_t is defined, but only does so
> > > by including the argz.h header.  if you try to build on a system that
> > > does provide error_t, but not argz.h, the argz replacement module fails
> > > to build. on glibc systems, error_t is defined in errno.h.  perhaps the
> > > gl_FUNC_ARGZ should be checking to see if errno.h exists and if so,
> > > including it.
> >
> > I don't quite understand.  If gl_FUNC_ARGZ finds that error_t is not
> > defined, it defines __error_t_defined in addition to error_t.
> 
> this must be a semi-recent addition then ... the package i'm looking at does 
> not do that ... here is the snippet from naim:
> # AC_LTDL_FUNC_ARGZ

The current gnulib module is newer, please try that.  The macro has also
been renamed to gl_FUNC_ARGZ for gnulib consistency.

> > This should keep your errno.h header from defining error_t.
> 
> shouldnt errno.h also be checked for the error_t type since that is where it 
> actually gets defined ?

Do you know of a system that has error_t that doesn't use
__error_t_defined?

Cheers,
Ralf