[binutils-gdb/binutils-2_40-branch] libctf: update regexp to allow makeinfo to build document

[Enze Li <lienze@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=f7c5db99b76e8dde89335d794c82fcbfbf53c612

commit f7c5db99b76e8dde89335d794c82fcbfbf53c612
Author: Enze Li <enze.li@hotmail.com>
Date:   Sat Jan 14 11:33:48 2023 +0800

    libctf: update regexp to allow makeinfo to build document
    
    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, the problem will be resolved permanently, thanks to Eli.
    
    libctf/ChangeLog:
    
            * configure: Regenerated.
            * configure.ac: Update regexp to match versions higher than 7.0.

Diff:
---
 libctf/configure    | 2 +-
 libctf/configure.ac | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/libctf/configure b/libctf/configure
index 17463a74cca..b347b292195 100755
--- a/libctf/configure
+++ b/libctf/configure
@@ -14865,7 +14865,7 @@ esac
     # We require texinfo to be 6.3 or later, for a working synindex
     # and validatemenus: otherwise we fall back to /bin/true.
     if ${MAKEINFO} --version \
-       | 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]|[1-6][0-9])' >/dev/null 2>&1; then
       build_info=yes
     else
         build_info=
diff --git a/libctf/configure.ac b/libctf/configure.ac
index a0148a4c328..47216ccf9fc 100644
--- a/libctf/configure.ac
+++ b/libctf/configure.ac
@@ -184,7 +184,7 @@ changequote(,)
     # We require texinfo to be 6.3 or later, for a working synindex
     # and validatemenus: otherwise we fall back to /bin/true.
     if ${MAKEINFO} --version \
-       | 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]|[1-6][0-9])' >/dev/null 2>&1; then
       build_info=yes
     else
         build_info=