[llvm-dev] Miscompilation while switching from clang-4 to clang-5

[Alex Denisov via llvm-dev]

Hi Tom, hi Michael,

Thank you for your help.
I understand the linking problem. What I do not understand is how to debug the difference between two versions of compilers.
This what I do (briefly):

clang++-4 foobar.cpp -lLLVM -l/opt/llvm-3.9/lib

clang++-5 foobar.cpp -lLLVM -l/opt/llvm-3.9/lib

The first command produces a working executable, while the other one does not.
I'm trying to understand whether I had this problem all the time but clang-4 could not see it, or there is no problem but clang-5 does something wrong.

> On 30. May 2018, at 23:59, Tom Stellard <tstellar at redhat.com> wrote:
> 
> On 05/30/2018 02:39 PM, Alex Denisov via llvm-dev wrote:
>> Hello everyone,
>> 
>> I observe a weird behavior switching from clang-4 to clang-5 (and any higher version).
>> I compile an executable that depends on LLVM. Everything works fine with clang-4, but when I run the executable compiled with clang-5 I see the following error:
>> : CommandLine Error: Option 'rewrite-map-file' registered more than once!
>> LLVM ERROR: inconsistency in registered CommandLine options
>> 
> 
> This usually indicates an issue with how you link your application.
> Two causes of this would be your application is linked against 2 different
> versions of LLVM or your are linking against the llvm static libraries and
> also libLLVM.so.
> 
> -Tom
> 
>> I want to debug the problem, but don't even know where to start.
>> I am happy to provide more info if anyone wants to participate.
>> 
>> I would appreciate any hints.
>> 
>> Thank you.
>> Alex.
>> --
>> AlexDenisov
>> Software Engineer, https://lowlevelbits.org
>> 
>> 
>> 
>> _______________________________________________
>> LLVM Developers mailing list
>> llvm-dev at lists.llvm.org
>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>> 
> 
> 
> 

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 488 bytes
Desc: Message signed with OpenPGP
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20180531/1671cd6d/attachment-0001.sig>