If you poke into bridges/ you can see that a ton of the gcc bridge code is horribly cut/paste.

We should hack the bridges/Library_cpp_uno.mk to link in a set of gcc_shared/ code - that isolates this into one place. This should then help eg. implement RTTI for Linux so that dynamic_cast<> works properly for bridged objects.

$ cd bridges
$ git grep initializeBlock

for example. At least these two guys should be shared.

sal_Size bridges::cpp_uno::shared::VtableFactory::getBlockSize(
    sal_Int32 slotCount)
{
    return (slotCount + 2) * sizeof (Slot) + slotCount * codeSnippetSize;
}

bridges::cpp_uno::shared::VtableFactory::Slot *
bridges::cpp_uno::shared::VtableFactory::initializeBlock(
    void * block, sal_Int32 slotCount, sal_Int32,
    typelib_InterfaceTypeDescription *)
{
    Slot * slots = mapBlockToVtable(block);
    slots[-2].fn = 0;
    slots[-1].fn = 0;
    return slots + slotCount;
}

I'd start by sharing only these two - and of course carefully checking that they are in fact copy/paste identical across all of the gcc backend/bridges =)

Thanks !