[PATCH v2] libctf: update regexp to allow makeinfo to build document

[Enze Li]

On Mon, Jan 16 2023 at 01:51:07 PM +0000, Nick Alcock wrote:

> On 14 Jan 2023, Enze Li via Binutils verbalised:
>
>> While trying to build gdb on latest openSUSE Tumbleweed, I noticed the
>> following warning,
>>
>>  checking for makeinfo... makeinfo --split-size=5000000
>>  configure: WARNING:
>>  *** Makeinfo is too old. Info documentation will not be built.
>>
>> then I checked the version of makeinfo, it said,
>> ======
>> $ makeinfo --version
>> texi2any (GNU texinfo) 7.0.1
>>
>> Copyright (C) 2022 Free Software Foundation, Inc.
>> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
>> This is free software: you are free to change and redistribute it.
>> There is NO WARRANTY, to the extent permitted by law.
>> ======
>>
>> After digging a little bit, it became quite obvious that a dot is
>> missing in regexp that makes it impossible to match versions higher than
>> 7.0, and here's the solution:
>>
>> -       | egrep 'texinfo[^0-9]*(6\.[3-9]|[7-9][0-9])' >/dev/null 2>&1; then
>> +       | egrep 'texinfo[^0-9]*(6\.[3-9]|[7-9]\.[0-9])' >/dev/null 2>&1; then
>>
>> However, Eli pointed out that the solution above has another problem: it
>> will stop working when Texinfo 10.1 will be released.  Meanwhile, he
>> suggested to solve this problem permanently.  That is, we don't care
>> about the minor version for Texinfo > 6.9, we only care about the major
>> version.
>>
>> In this way, problem solved permanently, thanks to Eli.
>
> Looks good to me: approved. (I can commit it if you like.)
>
> This should probably also be backported to the 2.40 branch to keep the
> latest released GNU tools building with the latest released GNU tools.

Hi Nick,

Thanks for your review.  I'm checking this in now, and backporting it to
the 2.40 branch as well.

Best Regards,
Enze