Sporadic build warning

Sporadic build warning

[Gregory Heytings via Emacs development discussions.]

While improving Lars' "emake" script, I realized that building Emacs from 
a clean copy of master produces a sporadic warning.  The warning is 
"Grammar in python.el contains 4 shift/reduce conflicts", and it is 
produced while compiling cedet/semantic/wisent/python.el.  But it is, 
curiously, not always produced: I just did a "make -j 4" ten times, and it 
was produced eight times.

Re: Sporadic build warning

[Lars Ingebrigtsen]

Gregory Heytings via "Emacs development discussions."
<emacs-devel@gnu.org> writes:

> While improving Lars' "emake" script, I realized that building Emacs
> from a clean copy of master produces a sporadic warning.  The warning
> is "Grammar in python.el contains 4 shift/reduce conflicts", and it is
> produced while compiling cedet/semantic/wisent/python.el.  But it is,
> curiously, not always produced: I just did a "make -j 4" ten times,
> and it was produced eight times.

Yes, there is code to inhibit that warning (when it's the expected
number of shift/reduce conflicts), but there's some ordering subtlety
that I've never taken the time to figure out.  That is, when saying
"make -jX", files are sometimes compiled in an order that makes the
warning appear, and sometimes not.

If somebody could figure out what's making this unstable, that'd be
appreciated.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no