[llvm-dev] LLD and LLVM_LINK_LLVM_DYLIB

[Pavel Labath via llvm-dev]

I've dealt with similar issues on the LLDB side, I think I can help
you with this.

pl

On 6 January 2017 at 09:39, Rui Ueyama via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
> Thanks for the info. I can reproduce the issue. But because of lack of cmake
> knowledge, I don't know how to fix that now. If no one will take a look at
> this, I'll investigate it.
>
> On Fri, Jan 6, 2017 at 2:51 PM, Hahnfeld, Jonas
> <Hahnfeld at itc.rwth-aachen.de> wrote:
>>
>> It builds fine but I cannot execute the resulting binary which aborts with
>> the mentioned error.
>> However I don't use LLVM_ENABLE_PROJECTS, I don't know if that changes the
>> way libLLVM-4.0svn.so is linked...
>>
>> Cheers,
>> Jonas
>>
>> Am Freitag, den 06.01.2017, 13:44 +0900 schrieb Rui Ueyama:
>>
>> Hi Hahnfeld,
>>
>> I just compiled with LLVM_LINK_LLVM_DYLIB enabled [1] and build lld with
>> `ninja lld`. It built fine. What am I missing?
>>
>> [1] $ cmake -GNinja -DCMAKE_BUILD_TYPE=Debug -DLLVM_ENABLE_THREADS=On
>> -DLLVM_ENABLE_LLD=true -DLLVM_LINK_LLVM_DYLIB=true
>> -DLLVM_ENABLE_PROJECTS='clang;lld' ../llvm-project/llvm
>>
>> On Wed, Jan 4, 2017 at 10:31 PM, Hahnfeld, Jonas via llvm-dev
>> <llvm-dev at lists.llvm.org> wrote:
>>
>> Hi all,
>>
>> I recently gave LLD a try and it definitely works fine. However one cannot
>> build it together with LLVM_LINK_LLVM_DYLIB:
>> ELF/Driver.cpp and ELF/DriverUtils.cpp pull in llvm/Support/CommandLine.h
>> which defines the command line options so these global variables end up in
>> libLLVM-4.0svn.so via liblldELF.
>> If this shared library is then linked into bin/lld or bin/opt one gets
>> errors because of "Option '...' registered more than once" as they are
>> also
>> present in the binaries themselves.
>>
>> Is it possible to keep the global variables for command line options out
>> of
>> libLLVM-4.0svn.so?
>>
>> Regards,
>> Jonas
>>
>> --
>> Jonas Hahnfeld, MATSE-Auszubildender
>>
>> IT Center
>> Group: High Performance Computing
>> Division: Computational Science and Engineering
>> RWTH Aachen University
>> Seffenter Weg 23
>> D 52074  Aachen (Germany)
>> Hahnfeld at itc.rwth-aachen.de
>> www.itc.rwth-aachen.de
>>
>>
>>
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>>
>
>
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