[cfe-users] Migrating to clang from GCC

Ankit Garg Ankit_Garg at mentor.com
Fri Jul 24 02:32:09 PDT 2015

Hi John,
           So you mean to say even if GCC compiled libraries are not 
using C++11, but migrated components compiled with clang has C++11, when 
final executable is created linking all these libraries via clang (GCC 
compiled libraries + clang compiled code having C++11)  can lead to 
troubles ?


On 07/24/2015 02:53 PM, Dallman, John wrote:
> Well, if you do this, you should not use C++11, or the new run-time library, libc++.
> I don't know if it will always work, because my GCC to Clang conversion process was done one shared library at a time, but if you use C++11 or libc++ before you have everything building with Clang, you're definitely making life harder for yourself.
> --
> John Dallman
> -----Original Message-----
> From: cfe-users-bounces at cs.uiuc.edu [mailto:cfe-users-bounces at cs.uiuc.edu] On Behalf Of Ankit Garg
> Sent: Friday, July 24, 2015 8:37 AM
> To: cfe-users at cs.uiuc.edu
> Subject: [cfe-users] Migrating to clang from GCC
> Hi All,
>            I am not sure whether its the right forum to ask this question.  I am trying to move to clang compiler from GCC, but our software has tons of components independently developed provding different static archive libraries. All these libraries are finally linked into executable.  Now rather than compiling every component with clang from scratch, I was thinking to pick one component at time to compile with clang and use GCC compiled static archives for other components to link into executable using clang compiler.  Would this always work ?
> So my question is whether GCC compiled object/archives involving C/C++ code would always be compatible with clang generated object files and can be mixed together during link step using clang compiler.  Would this always work if I can make sure that our libraries are not using any features of C++11 .
> Regards
> Ankit
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