Re: Help needed with maintainer-mode

[Thiago Jung Bauermann <thiago.bauermann@linaro.org>]

Hello,

Christophe Lyon <christophe.lyon@linaro.org> writes:

> I hoped improving this would be as simple as adding
> --enable-maintainer-mode when configuring, after making sure
> autoconf-2.69 and automake-1.15.1 were in the PATH (using our host's
> libtool and gettext seems OK).
>
> However, doing so triggered several problems, which look like race
> conditions in the build system (we build at -j160):
> - random build errors in binutils / gdb with messages like "No rule to
> make target 'po/BLD-POTFILES.in". I managed to reproduce something
> similar manually once, I noticed an empty Makefile; the build logs are
> of course difficult to read, so I couldn't figure out yet what could
> cause this.
>
> - random build failures in gcc in fixincludes. I think this is a race
> condition because fixincludes is updated concurrently both from
> /fixincludes and $buillddir/fixincludes. Probably fixable in gcc
> Makefiles.
>
> - I've seen other errors when building gcc like
> configure.ac:25: error: possibly undefined macro: AM_ENABLE_MULTILIB
> from libquadmath. I haven't investigated this yet.

I don't know about the last one, but regarding the race conditions, one
workaround might be to define a make target that regenerates all files
(if one doesn't exist already, I don't know) and make the CI call it
with -j1 to avoid concurrency, and then do the regular build step with
-j160.

-- 
Thiago