[Bug ld/16934] gc-sections fails to remove unused C++ member functions

[nickc at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=16934

--- Comment #6 from Nick Clifton <nickc at redhat dot com> ---
Have you tried enabling link-time optimization in gcc.  Ie compiling with -lfto
added to the g++ command lines.  This appears to work for the test case you
supplied.

The problem I believe is related to the virtual nature of the functions, which
are not invoked directly, but rather via pointers stored in a table.  The
linker is not sophisticated enough to be able to determine which entries in a
given table are unused, so it cannot delete the unneeded virtual functions.

Cheers
  Nick

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