Re: Help needed with maintainer-mode

[Andrew Carlotti <andrew.carlotti@arm.com>]

On Thu, Feb 29, 2024 at 06:39:54PM +0100, Christophe Lyon via Gcc wrote:
> On Thu, 29 Feb 2024 at 12:00, Mark Wielaard <mark@klomp.org> wrote:
> >
> > Hi Christophe,
> >
> > On Thu, Feb 29, 2024 at 11:22:33AM +0100, Christophe Lyon via Gcc wrote:
> > > I've noticed that sourceware's buildbot has a small script
> > > "autoregen.py" which does not use the project's build system, but
> > > rather calls aclocal/autoheader/automake/autoconf in an ad-hoc way.
> > > Should we replicate that?
> >
> > That python script works across gcc/binutils/gdb:
> > https://sourceware.org/cgit/builder/tree/builder/containers/autoregen.py
> >
> > It is installed into a container file that has the exact autoconf and
> > automake version needed to regenerate the autotool files:
> > https://sourceware.org/cgit/builder/tree/builder/containers/Containerfile-autotools
> >
> > And it was indeed done this way because that way the files are
> > regenerated in a reproducible way. Which wasn't the case when using --enable-maintainer-mode (and autoreconfig also doesn't work).
> 
> I see. So it is possibly incomplete, in the sense that it may lack
> some of the steps that maintainer-mode would perform?
> For instance, gas for aarch64 has some *opcodes*.c files that need
> regenerating before committing. The regeneration step is enabled in
> maintainer-mode, so I guess the autoregen bots on Sourceware would
> miss a problem with these files?
> 
> Thanks,
> 
> Christophe

Speaking of opcodes/aarch64-{asm|dis|opc}-2.c - why are these in the source
directory in the first place?  For a similar situation in GCC (gimple-match,
generic-match, insn-emit, etc.) we write the generated files to the build
directory, and generation is always enabled.  I see no reason not to do the
same thing for aarch64-{asm|dis|opc}-2.c.

Andrew

> >
> > It is run on all commits and warns if it detects a change in the
> > (checked in) generated files.
> > https://builder.sourceware.org/buildbot/#/builders/gcc-autoregen
> > https://builder.sourceware.org/buildbot/#/builders/binutils-gdb-autoregen
> >
> > Cheers,
> >
> > Mark