llvm dev - Feb 2013 - [LLVMdev] ARM assembler's syntax in clang

On Tue, Feb 19, 2013 at 06:53:19PM +0800, Ashi wrote:
> My develop environment is:
> Apple LLVM version 4.2 (clang-425.0.24) (based on LLVM 3.2svn)
> 
> Undefined symbols for architecture armv7:
>   "_add_gas", referenced from:
>       _main in main_ios_clang.o
Apple requires a leading _ for all external symbols. So "works as
expected".

Joerg

>Apple requires a leading _ for all external symbols. So "works as
>expected".
Thanks.

Do you have any advice to make the code work both under Apple and GNU gcc?

Best regards,
ashi


On Tue, Feb 19, 2013 at 8:20 PM, Joerg Sonnenberger <joerg at
britannica.bec.de
> wrote:
> On Tue, Feb 19, 2013 at 06:53:19PM +0800, Ashi wrote:
> > My develop environment is:
> > Apple LLVM version 4.2 (clang-425.0.24) (based on LLVM 3.2svn)
> >
> > Undefined symbols for architecture armv7:
> >   "_add_gas", referenced from:
> >       _main in main_ios_clang.o
>
> Apple requires a leading _ for all external symbols. So "works as
> expected".
>
> Joerg
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
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> Do you have any advice to make the code work both under Apple and GNU gcc?
The leading underscore for external symbols is standard, if that's what
you're referring to.
http://en.m.wikipedia.org/wiki/Underscore#Origins_in_identifiers
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