[llvm-dev] [LLD] Mixing bitcode and native code

[Carlo Kok via llvm-dev]

Seems my problem was the reverse; the definition did NOT have stdcall properly set; which is why i wasn't found. Setting that and everything worked. Thanks for the help.


On Fri, Mar 30, 2018, at 23:40, Reid Kleckner wrote:
> Clang may be avoiding this problem because it will always emit "\01__elements_exception_handler at 20" as the function name. It probably does that for precisely this reason.
> 
> On Fri, Mar 30, 2018 at 11:55 AM Carlo Kok via llvm-dev <llvm-dev at lists.llvm.org> wrote:
>> The problem is a bitcode implementation that has a stdcall function that's used from native code. 1 side has _elements_exception_handler, compiled that would be __elements_exception_handler at 20 due to stdcall. The native bit has the mangled name and the linker can't find it as the bitcode indexes have it without mangling.
>>  
>>  I'll try to prepare a testcase when I get back in the office.
>> 
>> Rui Ueyama <ruiu at google.com> schreef op 30 maart 2018 19:17:06 CEST:
>>> Mixing native and bitcode files should just work, and that happens all the time, as most programs need at least crt.o (which is a precompiled native object file containing startup code).
>>> 
>>> Could you elaborate the issue a bit? It might be a bug in lld.
>>> 
>>> 
>>> On Fri, Mar 30, 2018 at 3:11 AM Carlo Kok via llvm-dev <llvm-dev at lists.llvm.org> wrote:
>>>> On Fri, Mar 30, 2018, at 11:23, Carlo Kok via llvm-dev wrote:
>>>>  > When having a project that's partially bitcode and partially native code, should lld allow linking a native .o to a bitcode .o?
>>>>  >
>>>>  > specifically in my case, I've got an stdcall function in bitcode, called by native code, but it can't find the symbol (bitcode has it
>>>>  > unmangled, native code with _ and @20)
>>>>  
>>>>  
>>>>  When having thinlto enabled in both ends the same thing happens (but bitcode on both ends works fine)
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>> 
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