Re: r150960 changed ltmain.sh and broke the build

[Paolo Bonzini]

> How about
>
>       Patterns should not include the separator (unless escaped), even
>       as part of a character class.  In conformance with Posix, the Cray
>       `sed' rejects `s/[^/]*$//': use `s,[^/]*$,,'.  Even escaped,
>       patterns should not include separators that are also used as
>       metacharacters.  For example, GNU sed 3.02 rejects `s,x\{1\,\},,',
>       and is used on MinGW.
>
> ?

Yes, that's nice, except I would remove "and is used on MinGW".

By the way even sed 4.0.x has that interpretation.  Another semantic 
change is s|a\|b|c| which is alternation up to sed 4.0.x included, but 
in sed 4.1.x and above.

The reason is that sed up to 4.0.x passes the backslash to the regex 
matcher (causing trouble with \,) while 4.1.x strips it.

Paolo