llvm dev - Jan 2020 - LLVM 9.0.0 ORC JIT on windows, Duplicate definition of symbol '__real@

I've been using ORC jit based off the Kaleidoscope tutorials successfully
on Linux and OS X.  However when I tried to move to windows I'm having
troubles.

Following the advice here,
http://lists.llvm.org/pipermail/llvm-dev/2019-January/128812.html, I added:
ObjectLayer.setAutoClaimResponsibilityForObjectSymbols( true );
ObjectLayer.setOverrideObjectFlagsWithResponsibilityFlags( true );

I'm JITTing multiple functions in a loop.
I create the Module and lookup the first function just fine using the
following code from the tutorial.

llvm::cantFail( jit->addModule(std::move(mModule)));
auto ExprSymbol = jit->lookup( func_name.c_str( ));

When I go to lookup the second function I'm jitting, I get the
following error:
JIT session error: Duplicate definition of symbol '__real at
3ff0000000000000'

Any pointers or help would be appreciated,

Kevin
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Hi Kevin,

Sounds like you have run into this bug: 
https://bugs.llvm.org/show_bug.cgi?id=40074

A workaround is to build LLVM with HasCOFFComdatConstants set to false 
in MCAsmInfoCOFF.cpp.

Regards,

Machiel van Hooren


On 07-Jan-20 12:42, Kevin Tew via llvm-dev wrote:
> I've been using ORC jit based off the Kaleidoscope tutorials 
> successfully on Linux and OS X. However when I tried to move to 
> windows I'm having troubles.
>
> Following the advice here, 
> http://lists.llvm.org/pipermail/llvm-dev/2019-January/128812.html, I 
> added:
> ObjectLayer.setAutoClaimResponsibilityForObjectSymbols( true );
> ObjectLayer.setOverrideObjectFlagsWithResponsibilityFlags( true );
>
> I'm JITTing multiple functions in a loop.
> I create the Module and lookup the first function just fine using the 
> following code from the tutorial.
>
> llvm::cantFail( jit->addModule(std::move(mModule)));
> auto ExprSymbol = jit->lookup( func_name.c_str( ));
>
> When I go to lookup the second function I'm jitting, I get the 
> following error:
> JIT session error: Duplicate definition of symbol 
> '__real at 3ff0000000000000'
>
> Any pointers or help would be appreciated,
>
> Kevin
>
>
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
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