bug#20858: 25.0.50; Strange messages in the output of 'autogen.sh' (from MSYS2 bash)

bug#20858: 25.0.50; Strange messages in the output of 'autogen.sh' (from MSYS2 bash)

[Dani Moncayo]

I've observed two strange messages in the output of 'autogen.sh'
(current master branch):

----------------------------------
$ ./autogen.sh
Checking whether you have the necessary tools...
(Read INSTALL.REPO for more details on building Emacs)

Checking for autoconf (need at least version 2.65)...
ok
Checking for automake (need at least version 1.11)...
ok
Your system has the required tools.
Running 'autoreconf -fi -I m4' ...
main::scan_file() called too early to check prototype at
/usr/bin/aclocal-1.11 line 644.
Unescaped left brace in regex is deprecated, passed through in regex;
marked by <-- HERE in m/\${ <-- HERE ([^ \t=:+{}]+)}/ at
/usr/bin/automake-1.11 line 4159.
You can now run './configure'.
----------------------------------

See above the two lines just after "Running 'autoreconf -fi -I m4' ...".

I see those two strange messages from MSYS2 bash, but not from Cygwin
bash.  So I wanted to let you know, in case there is something to fix
(perhaps in my environment?).

TIA.

-- 
Dani Moncayo

bug#20858: 25.0.50; Strange messages in the output of 'autogen.sh' (from MSYS2 bash)

[Glenn Morris]

Dani Moncayo wrote:

> Running 'autoreconf -fi -I m4' ...
> main::scan_file() called too early to check prototype at
> /usr/bin/aclocal-1.11 line 644.
> Unescaped left brace in regex is deprecated, passed through in regex;
> marked by <-- HERE in m/\${ <-- HERE ([^ \t=:+{}]+)}/ at
> /usr/bin/automake-1.11 line 4159.

Presumably you get exactly the same if you just run

    autoreconf -fi -I m4

So this is an issue with your autotools installation, and nothing to do
with Emacs.

bug#20858: 25.0.50; Strange messages in the output of 'autogen.sh' (from MSYS2 bash)

[Glenn Morris]

Glenn Morris wrote:

> Dani Moncayo wrote:
>
>> Running 'autoreconf -fi -I m4' ...
>> main::scan_file() called too early to check prototype at
>> /usr/bin/aclocal-1.11 line 644.
>> Unescaped left brace in regex is deprecated, passed through in regex;
>> marked by <-- HERE in m/\${ <-- HERE ([^ \t=:+{}]+)}/ at
>> /usr/bin/automake-1.11 line 4159.
>
> Presumably you get exactly the same if you just run
>
>     autoreconf -fi -I m4
>
> So this is an issue with your autotools installation, and nothing to do
> with Emacs.

I'm going to guess that your're using perl 5.22:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=787531

The other issue is apparently fixed in automake 1.12:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=752784