>>>>> "Daniel" == Daniel Jacobowitz <[EMAIL PROTECTED]> writes:
Daniel> On Fri, May 13, 2005 at 05:33:21PM -0400, Paul Koning wrote: >> I ran into link errors complaining about references to hidden >> symbol _Unwind_GetIP from a DSO. >> >> It turns out unwind-dw2.c is compiled with -fvisibility=hidden for >> the static library case (but not for the shared library case). >> >> In my link, I was using the libgcc.a (for that particular platform >> I don't use libgcc.so). So the linker complained. >> >> The documentation for -fvisibility=hidden suggets that this switch >> is useful for shared libraries, to make things smaller and faster. >> It doesn't seem to be appropriate for object libraries. >> >> I suppose I can override the "hidden" attribute for that one >> symbol, or change Makefiles so that switch isn't put there, but >> I'm wondering why this change and why the mismatch between usage >> and documentation. Daniel> It sounds like you are building with --enable-shared and then Daniel> picking/choosing the libraries, but you haven't described how Daniel> you build, so I'm just guessing. Daniel> Normally in an --enable-shared build the copy in libgcc_eh.a Daniel> has hidden visibility, and can be included in built Daniel> libraries. The copy in libgcc_s.so.1 is globally visible. Daniel> You are also misinterpreting the problem. The hidden symbol Daniel> is not the problem; libstdc++ with an undefined reference to Daniel> _Unwind_GetIP, and no dependency on libgcc_s.so.1, is the Daniel> problem. Ok, I can work on that. The puzzle is that the build procedure is unchanged from gcc 3.3.3, and with that version the application builds just fine. It just drags in unwind_dw2.o from libgcc.a and all is well. paul
