[Bug lto/48094] ld: warning: section has unexpectedly large size errors in objc/obj-c++ lto

[iains at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48094

Iain Sandoe <iains at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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             Status|WAITING                     |NEW

--- Comment #3 from Iain Sandoe <iains at gcc dot gnu.org> 2011-03-12 18:34:51 UTC ---
(In reply to comment #2)

> (b) the second needs more checking - the tests pass on darwin9 (and darwin10
> with 3.2.5 - last time I tried)

it looks like the .lazy_reference to . objc_class_name_myRootObject is getting
dropped somewhere;
in this instance, because the code is self-contained, it works OK (when ld
doesn't barf).

... in other cases in the test-suite, the only external object is usually
"Object" which is in libobjc and therefore it also works.

I have an idea about getting rid of the TARGET_ASM method to make these
references and use a real variable to carry the information (just make it
zero-sized, and use that + a meta-data tag to emit the efficient asm).   I was
intending to make that a stage-1 investigation -- but perhaps it might warrant
trying sooner.