[PATCH] gdb/doc: use silent-rules.mk in the Makefile

[Joel Brobecker]

Hi Andrew,

> > commit 13baf7f097593b9d877036f55fb3d9c2d443ea38
> > Author: Andrew Burgess <aburgess@redhat.com>
> > Date:   Fri Apr 12 17:47:20 2024 +0100
> >
> >     gdb/doc: use silent-rules.mk in the Makefile

I think this patch unfortunately broke the install phase of the doc
when building from a source package. To reproduce, first create
a tarball file by executing the following command from the root
of the binutils-gdb repository:

    $ ./src-release.sh gdb

This will create a .tar file at the root of the repository
(and it creates a lot of other files, so you want to do this in
a copy of your repository, if you don't want to have to deal
with the pollution)

Then, from a separate directory, first unpack the tarball sources.
And then, create a local build directory, and from that directory,
configure and build GDB - I did:

    $ CFLAGS='-g' CXXFLAGS='-g' ../gdb-15.0.50.20240508/configure --prefix=/[...]/ins
    $ make -j8

Once you've done that, try...

    $ make install

... and you should see the error I'm getting:

    | [...]
    |   TEXI2POD gdb.pod
    | cannot find GDBvn.texi at ../../../gdb-15.0.50.20240508/gdb/doc/../../etc/texi2pod.pl line 251, <GEN0> line 16.
    | make[5]: *** [Makefile:663: gdb.pod] Error 2

I don't know what the root of the problem is, but I think one thing
that is happening now that should not be happening is the fact that
(I think) it is trying to re-generate the gdb.1 man page, whereas
gdb.1 is already present in the sources. With the gdb-14.2 release,
from what I've seen, the install simply consists in copying gdb.1
from source dir to install dir.

Do you think you could take a look? And once we have a fix, could you
backport it to the gdb-15-branch? I think we'll want the fix in that
branch before we create the first pre-release.

Thank you!
-- 
Joel