Brian May <bam@snoopy.debian.net> writes:
>>>>>> "Russ" == Russ Allbery <rra@debian.org> writes:
> Russ> Out of curiosity, have you talked to Love about this issue
> Russ> already? Given that MIT Kerberos supports symbol versions
> Russ> upstream, I'm a little surprised that Heimdal doesn't as
> Russ> well, and I'd think that Love would at least be happy to
> Russ> take a patch even if he doesn't have time to write it
> Russ> himself.
> Anyone here willing to write such a patch if upstream would accept it?
> The current patch may not be acceptable, it modifies libtool.
I have some code that I use for other projects that supports doing symbol
versioning on Linux without modifying libtool (it just passes the
appropriate flags through libtool with -Wl). I don't have a lot of time
to work on this, but I'm happy to provide those details to start people
off.
I do this in configure.ac:
dnl If and only if we're on Linux, use a mapfile to do symbol versioning.
dnl We'd like to do this on all platforms, but the syntax is different
dnl everywhere and I don't feel like dealing with the differences.
case "$host" in
*-linux*)
VERSION_LDFLAGS="-Wl,--version-script=mapfile"
;;
*)
VERSION_LDFLAGS=""
;;
esac
AC_SUBST([VERSION_LDFLAGS])
and then put a mapfile that contains the symbol versioning information in
each directory with a shared library. Then, in the Makefile, just include
$(VERSION_LDFLAGS) in the arguments passed to libtool for the link.
(Heimdal uses Automake, so this means adding them to the appropriate
_LDFLAGS variable for each library.
If I remember the Heimdal build system properly, it builds only one shared
library in each directory, so this should work. If multiple shared
libraries are built in a particular directory, you have to do something
more complicated.
--
Russ Allbery (rra@debian.org) <http://www.eyrie.org/~eagle/>