llvm dev - Jan 2017 - LLD and LLVM_LINK_LLVM_DYLIB

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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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
>
>
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
>
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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
> > 
> > 
> > 
> > 
> > 
> > 
> > _______________________________________________
> > 
> > LLVM Developers mailing list
> > 
> > llvm-dev at lists.llvm.org
> > 
> > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
> > 
> > 
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