Eric Blake <ebb9@xxxxxxx> writes:
> According to Russ Allbery on 3/12/2009 10:32 PM:
>> 2. On HP-UX 11.23, regexp matching with expr does not allow multiple sub-
>> expressions:
>>
>> bash-3.1$ expr 'Xfoo' : 'X\(f\(oo\)*\)$'
>> expr: More than one '\(' was used.
> Ouch. I don't have access to HP-UX to verify, but this means we need to
> audit autoconf source to make sure we don't violate this restriction.
I unfortunately have no access to HP-UX any more either and hence can't
confirm this one.
>> 3. On GNU/Linux the regexp "$", when used with older versions of expr,
>> matches newlines embedded in the match string:
>>
>> bash-3.1$ baz='foo
>> > bar'
>> bash-3.1$ expr "X$baz" : 'X\(foo\)$' || echo baz
>> foo
>
> I'm assuming this was from an older version of coreutils? Can someone
> determine 'expr --version' in the broken case, to see when it was fixed?
rra@lbdns1:~$ baz='foo
> bar'
rra@lbdns1:~$ expr "X$baz" : 'X\(foo\)$' || echo baz
foo
rra@lbdns1:~$ expr --version
expr (GNU coreutils) 5.2.1
exodus:~> bash
rra@exodus:~$ baz='foo
> bar'
rra@exodus:~$ expr "X$baz" : 'X\(foo\)$' || echo baz
foo
rra@exodus:~$ expr --version
expr (GNU coreutils) 5.97
eagle@windlord:~$ baz='foo
> bar'
eagle@windlord:~$ expr "X$baz" : 'X\(foo\)$' || echo baz
baz
eagle@windlord:~$ expr --version
expr (GNU coreutils) 6.10
There's no mention that I can find in the coreutils NEWS file, though, in
a quick search for "expr".
--
Russ Allbery (rra@xxxxxxxxxx) <http://www.eyrie.org/~eagle/>
_______________________________________________
Autoconf mailing list
Autoconf@xxxxxxx
http://lists.gnu.org/mailman/listinfo/autoconf
