Re: Symbol versioning in C++ (two ld bugs)

[Ulrich Drepper <drepper at redhat dot com>]

Phil Edwards <phil@jaj.com> writes:

> fnmatch() matches shell filename patterns, i.e., globbing, not regexps.
> 
> Oops.
> 
> So:  which kind of patterns are supposed to be accepted?

globbing.  regex is too slow and in other package, well glibc, we use
'*' as a pattern.  This is also what Sun does.

> Bug #2
> ======
> The ldlex.l lexer only specifies
> 
>         [*?.$_a-zA-Z]([*?.$_a-zA-Z0-9]|::)*
> 
> for a version symbol pattern (see V_IDENTIFIER).  No brackets, no ranges,
> no braces -- that is, we can't even use the globbing patterns that fnmatch()
> would allow!

This is more or less encoding the current practice.  No special reason
to have it like this except that there might be problems with the
grammar.  Somebody will have to check it.

> For the record, std::* is not the only problem; there are other namespaces
> and other patterns which also need to be exposed (the __cxa_* stuff for
> example).

This already works.  __cxa_* is a valid pattern.

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