alias of hidden function

Dave Korn
Mon May 10 15:56:00 GMT 2010

On 10/05/2010 16:19, Jack Howarth wrote:

> Compiler executable checksum: c54eb6db87684e4d5a5bb9ad02c2b2c4
> 20081222_1.c:16: error: 'EXT_x' aliased to undefined symbol 'INT_x'
> which I assume means this error message is coming from the compiler and not
> the linker. So it still unclear to me if this is a bug in the alias attribute
> support in gcc for darwin or in darwin's assembler or linker.

  I get the same on COFF, so it isn't the assembler or linker, and visibility
is a red herring, therefore it must be a problem in the compiler's
understanding of aliases; QED, I would have thought.  Haven't had time to dig
deeper yet.  (On COFF with GAS, the compiler uses a .set directive to
implement the alias.)

  The error comes from finish_aliases_1 in varasm.c, where it is suppressed in
the case of a weakref.  I don't know why.


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