Re: Subversion library version numbers

Greg Hudson <ghudson@MIT.EDU> writes:

> As I understand it, symbol versioning would allow people to successfully
> link against consumers of two different major versions of our
> libraries. (The OSX two-level namespace would allow the same, I
> believe.)

That's right. I think we could also use it to prevent the internal
svn_xxx__yyy symbols leaking out, although that may well require
changes to the way the test suite is linked.

> That's a win, but I don't really know how it works, and I didn't
> think there was a portable way of doing it.

It's not portable. Some stuff here

http://people.redhat.com/drepper/dsohowto.pdf (Section 3, page 31)

I'd probably use an autoconf test to identify platforms that support a
linker version script. That should get Linux and BSD, and perhaps
other platforms using GNU ld. I believe the native Solaris tools
could use the same script, although I think they require different
command line options.

-- 
Philip Martin
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