symbol versioning, take 2

[Phil Edwards]

On Wed, Feb 13, 2002 at 05:47:23PM -0500, Phil Edwards wrote:
> The idea behind the tests and the name of the version script is that,
> if someone wants to provide a script which does not require GNU ld, we
> can drop that in config/linker-map.foo and --enable-symvers will DTRT.
> (Also note that writing such a script should be easier than what I said it
> would be earlier, since the person would not have to work from scratch.
> Simply mangling and expanding the symbols in linker-map.gnu is all that
> would be required.  A simple matter of programming.)

I've been asked some questions in private email; the answers should be
archived.

1) No, at the point I don't plan to work on such a super-portable version
   script myself, although I would help anyone who tried.

2) "If it's a simple matter of programming, why aren't you doing it?"
   For those who didn't recognize it:
   http://www.tuxedo.org/~esr/jargon/html/entry/SMOP.html

3) This problem has been partially solved before; recall that the libgcc
   setup is (quoting from my previous makefile) something like

        linker.map: ${top_srcdir}/symbols.ver ${libstdc___la_OBJECTS}
               { ${NM} -pg .libs/*.o ../libmath/.libs/libmath.a \
                    ../libsupc++/.libs/libsupc++convenience.a; \
                    echo '%%'; cat ${top_srcdir}/symbols.ver; \
               } | awk -f ${top_srcdir}/../gcc/mkmap-symver.awk > tmp-$@
               mv tmp-$@ $@

   That awk script certainly works; it's just the input ("symbols.ver")
   which needs to be constructed beforehand.


Phil

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