On Thu, Nov 10, 2011 at 11:29:35PM +0000, Iain Sandoe wrote:
>
> On 10 Nov 2011, at 20:43, Iain Sandoe wrote:
>>> The symbol _ITM_malloc is in libitm. Maybe the problem is an extra _
>>> before the _ITM_malloc?
>>
>> Actually, I think the missing symbol is
>> ___emutls_v._ZN3GTM12_gtm_thr_tlsE
>> and (although the m32 lib builds OK - the symbol is also missing
>> there).
>>
>> The m64 build fails because of the -Wl,-undefined -Wl,dynamic_lookup
>
> FAOD, Is there some reason that this library needs to resolve symbols
> from some external source at load time?
>
>> in combination with the missing var.
>> the m32 build succeed - but none of the testsuite runs, because the
>> emutls var is missing (not resolved at load).
>>
>> ----
>>
>> ... I strongly suspect it might be another manifestation of:
>> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50598
>
> This is confirmed - if I hack around that bug, the library builds.
Iain,
I can confirm on x86_64-apple-darwin11 that if I revert r179429...
* cgraphunit.c (ipa_passes): Remove unrechable nodes.
* lto-streamer-out.c (produce_symtab): Skip unused extern declarations.
* ipa.c (cgraph_remove_unreachable_nodes): Do not assume that external
functions are reachable when address is taken.
* ipa-inline-analysis.c (reset_inline_edge_summary): New
* gcc.dg/ipa/ctor-empty-1.c: Update dump file.
the linker crash is eliminated when libitm.dylib is linked.
Jack
>
> There are two other issues I can see so far:
>
> 1/ the symbols generated in sjlj.S are not getting their extra "_" (I
> patched that up temporarily manually) ... which allows some of the
> testsuite to pass.
>
> 2/ The section .tm_clone_table doesn't exist for Darwin leading to
> assembler errors because ".tm_clone_table" is not a complete section
> spec for Darwin
> (that's not too hard to fix - but too late for tonight).
>
> Iain
