GMP work on symbol visibility
marc.glisse at inria.fr
Wed Aug 31 21:50:31 UTC 2016
On Wed, 31 Aug 2016, Torbjörn Granlund wrote:
> There are several complex issues I need to understand and resolve. One
> issue is how to handle (unit) testing of hidden functions. I will
> probably resolve that with alias symbols such as foo_for_testing as an
> alias for foo.
Would that be only in a temporary, testing-only libgmp.so, or also in the
installed libgmp.so? I am guessing the second, but it seems a bit sad that
the exported symbol list remains polluted.
> Another issue is with libgmpxx.so and its dependency on libgmp.so. As
> separate shared libs, hidden symbols of libgmp.so will not be reachable
> from libgmpxx.so, which of course means we cannot hide them. Also,
> there will be no performance wins for any libgmpxx.so references to
> I see two solutions:
> (1) If we really want to discourage external use, arrange an alias to
> something wierd, making libgmpxx reach the symbol foo as fuckhead_foo.
> (2) Put (allmost) all of libgmp.so in libgmpxx.so. This gives the best
Does libgmpxx.so use that many private functions from libgmp.so and are
they performance critical? To me, libgmpxx.so is very small and only
contains I/O functions, where the overhead of a few calls shouldn't matter
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