On Wed, Dec 19, 2012 at 6:13 PM, Cary Coutant <ccout...@google.com> wrote: > Two test cases, debug_msg_so.err and debug_msg_ndebug.err, are still > broken by the original patch, because (a) debug_msg.so has a DT_NEEDED > entry for libstdc++.so, (b) the use of -static-libstdc++ means that > that DT_NEEDED entry is unknown when we link the executable, and (c) > the undefined symbols in debug_msg.so will not be printed. > > The obvious solution would be to add an option to cancel > -static-libstdc++, but there doesn't seem to be one. (There is a > -shared-libgcc option, but no -shared-libstdc++.) I've tested two > alternatives that work: > > (1) Force the issue by explicitly adding -Bdynamic -lstdc++ to the > link flags for debug_msg_so and debug_msg_ndebug. > > (2) Remove the DT_NEEDED entry from debug_msg.so by linking it with > -static-libstdc++ also. > > Which one seems preferable? Any better ideas?
Adding -Bdynamic seems fine to me. And I guess GCC should have a -shared-libstdc++ option. Ian
