[llvm-dev] Orc JIT + STL = broken on Windows?

[Stefan Gränitz via llvm-dev]

Hi Geoff

> LLVM ERROR: Associative COMDAT symbol 'GVName' is not a key for its
> COMDAT.
This is in CodeGen TargetLoweringObjectFileCOFF so this isn't
necessarily JIT specific. Maybe a backtrace would be helpful?

> lli --jit-end=orc-lazy hello.bc
Greedy Orc mode recently landed in lli:
https://reviews.llvm.org/rGe1579894d2051db8
You might want to retry with that in order to rule out the
lazy-JIT-infrastructure as a cause for the error.

> should I just give up now on porting our Orc-based application to Windows?
I am not aware of anyone actively working on improved Orc Windows
support right now.

On 02/04/2021 12:40, Geoff Levner via llvm-dev wrote:
> Sorry, there is a typo in my previous message: read "jit-kind" where I
> typed "jit-end".
>
> On Fri, Apr 2, 2021 at 12:37 PM Geoff Levner <glevner at gmail.com
> <mailto:glevner at gmail.com>> wrote:
>
>     Given this C++ code (hello.cpp):
>
>         #include <iostream>
>         int main()
>         {
>             std::cout << "Hi, mom." << std::endl;
>             return 0;
>         }
>
>     On Linux (CentOS 7), no problem:
>
>         > clang++ -c -emit-llvm hello.cpp
>         > lli --jit-end=orc-lazy hello.bc
>         Hi, mom.
>         >
>
>     But on Windows (7):
>
>         > clang++ -c -emit-llvm hello.cpp
>         > lli --jit-end=orc-lazy hello.bc
>         LLVM ERROR: Associative COMDAT symbol
>     '??_7_Iostream_error_category2 at std@@6B@' is not a key for its COMDAT.
>     PLEASE submit a bug report to https://bugs.llvm.org/
>     <https://bugs.llvm.org/> and include the crash backtrace.
>
>     I know Orc JIT lacks COMDAT support, but I thought that just
>     caused duplicate symbols sometimes. Am I doing something stupid
>     here? Or should I just give up now on porting our Orc-based
>     application to Windows? (The application JIT-compiles C++ modules
>     which rely heavily on STL.)
>
>     Geoff
>
>
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-- 
https://flowcrypt.com/pub/stefan.graenitz@gmail.com

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