[Bug lto/50394] [meta-bug] Issues with building libreoffice with LTO

[michael.meeks at suse dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50394

--- Comment #24 from Michael Meeks <michael.meeks at suse dot com> 2011-09-23 08:33:17 UTC ---
> I can imagine that this sort of magic breaks with LTO. Is the solution as 
> simple as using non-LTO version of libgcc3_uno.so? I will try to take a look 
> how this is implemented.

Great - so, we wouldn't loose much by having the bridge compiled without
optimisation - it is ultimately used to map C++ -> Java or python so all
performance is already shot by that stage ;-)

bridges/source/cpp_uno/gcc3_linux_intel/call.s
bridges/source/cpp_uno/gcc3_linux_x86-64/call.s

are the places to dig - unfortunately there is -far- too much cut/paste going
on in here, though we've done some work to try to share more IIRC.

These snippets are used by cpp2uno.cxx - to build trampolines cf. 'codeSnippet'
- which (I hope) should work fine, and by uno2cpp.cxx to invoke things eg.
'uno2cpp.cxx's callVirtualMethod - which has some fun assembler in each case.

Does that help ?