Re: Bootstrap failure using 'make -j4' [Cygwin]

[Eli Zaretskii <eliz@gnu.org>]

> Date: Sat, 22 May 2010 15:54:29 +0200
> From: Jan Djärv <jan.h.d@swipnet.se>
> CC: angelo.graziosi@alice.it, emacs-devel@gnu.org
> 
> >         Generally, stick to the widely-supported (usually POSIX-specified)
> >      options and features of these programs.  For example, don't use `mkdir
> >      -p', convenient as it may be, because a few systems don't support it at
> >      all and with others, it is not safe for parallel execution.
> >
> > If this is no longer a consideration, perhaps we should ask Richard to
> > amend standards.texi.
> >
> 
> Well, -p is in POSIX now, so I guess the standards needs to be updated on that 
> point.  But it is still not parallel safe.

If it's not parallel safe, it might be a problem in this case, since
multiple .c.o rules could invoke it in parallel under "make -j".

> Emacs uses prototypes in C without macros now, and that is something the GNU 
> coding standards says not to do.  So I really don't know how relevant the GNU 
> Coding standards are for Emacs developemnt.

They are relevant, and the document is actively maintained.  Any
anachronisms you find there I suggest to report to Richard.