Re: [PATCH] some systems don't have (and need) sys/select.h

> Robert Schiele <rschiele@gmail.com> writes:
> 
> > The select stuff is already in sys/time.h on on some systems like HP-UX
> > thus we should not include sys/select.h in that case.
> >
> > Signed-off-by: Robert Schiele <rschiele@gmail.com>
> 
> The patch looks good.  I'd rather try to be a bit more helpful
> to people who want to port git to their system that is not
> HP-UX, though.
> 
> How about wording it like this?
> 
> Subject: pre-POSIX.1-2001 systems do not have <sys/select.h>
> 
> POSIX.1-2001 has declaration of select(2) in <sys/select.h>, but
> in previous version of SUS, it is declared in <sys/time.h>,
> which is already included in git-compat-util.h.
> 
> This introduces NO_SYS_SELECT_H macro in the Makefile to be set
> on older systems, to skip inclusion of <sys/select.h> that does
> not exist on them.
> 
> We could check _POSIX_VERSION with 200112L and do this
> automatically, but earlier it was reported that the approach
> does not work well on some vintage of HP-UX.  Other systems may
> get _POSIX_VERSION itself wrong.  At least for now, this manual
> configuration is safer.