[llvm-dev] LLD and LLVM_LINK_LLVM_DYLIB

[Rui Ueyama via llvm-dev]

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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