[LLVMdev] lli unable to resolve symbol _ZNKSt3__16locale9use_facetERNS0_2idE in bitcode

[Ashok Nalkund]

Thanks Nick/Duncan. I will to look into this and report back.

On 5/23/2012 12:13 AM, Duncan Sands wrote:
> Hi Nick,
>
>> Fundamentally the issue is that the system linker is supposed to define
>> __dso_handle when linking, but since there is no system linker between
>> your build of the .bc files and running lli, nobody has defined it.
>>
>> It seems reasonable to me that lli should define __dso_handle if it's
>> declared in the module.
>>
>> You could module tools/lli/lli.cpp to add a global:
>>
>>      char *dummy_dso_handle = 0;
>>
>> and tie it to __dso_handle via.
>>
>>      if (GlobalVariable *DSO = Mod->getGlobalVariable("__dso_handle"))
>>        if (!DSO->hasInitializer())
>>          EE->updateGlobalMapping(DSO,&dummy_dso_handle);
>>
>> somewhere in main(), say after disabling lazy compilation. Entirely
>> untested though; we might need to give dummy_dso_handle a real value.
>
> this is already done in JIT.cpp, search for HAVE___DSO_HANDLE.  Probably
> the interpreter and MCJIT just need to get the same logic.
>
> Ciao, Duncan.
>
>>
>> Nick
>>
>>> tia
>>>
>>> On 5/21/2012 2:46 PM, Ashok Nalkund wrote:
>>>> On 5/21/2012 11:15 AM, Nick Lewycky wrote:
>>>>> Ashok Nalkund wrote:
>>>>>> Resending, any pointers? I demangled the symbol and it turns out to be:
>>>>>> std::__1::locale::use_facet(std::__1::locale::id&) const
>>>>>
>>>>> My guess is that you've got a .bc file produced on a mac using libc++
>>>>> (hence the ::_1 part) and you're trying to run it on linux with
>>>>> libstdc++ (which doesn't use inline namespaces, the '::_1::' part). That
>>>>> won't work.
>>>>>
>>>>> Nick
>>>>
>>>> Thanks for the clue. I had earlier tried to use libc++ and there were
>>>> some remnants of that try. I've now cleaned up and now it gets past the
>>>> use_facet error.
>>>>
>>>> It now complains about '__dso_handle'. I saw a bug already reported but
>>>> its status is still NEW:
>>>> http://llvm.org/bugs/show_bug.cgi?id=7847
>>>>
>>>> As mentioned in the bug, the problem seems to be when the interpreter is
>>>> used.
>>>>
>>>> There is another post on cfe-dev list:
>>>> http://clang-developers.42468.n3.nabble.com/Configuring-HAVE-DSO-HANDLE-by-CMake-td3423707.html
>>>>
>>>>
>>>> Any thoughts?
>>>>
>>>> thanks
>>>> ashok
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>>
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