Aliased to undefined symbol

[stelios xanthakis <sxanth at cs dot teiath dot gr>]

Hi

This is a recent change (last month?) in the semantics of alias.
We can no longer say:

---------program.c---------
int foo();
int bar () __attribute__((alias("foo")));
------------------------------

According to the documentation:

"""
This is because it's meaningless to define an alias to an undefined symbol.
On Solaris, the native assembler would have caught this error, but GNU 
as does not.
"""

But how is this meaningless? It used to work just fine.  If the solaris 
native assembler
caught this "error" then it's probably a bug of the solaris native 
assembler. If it was an
error GNU as couldn't catch, then programs using this would crash or 
fail to link.

Probably this is not important since "alias" is a non-standard extension 
and people
who use it should be prepared for such breakage. Still, I hope it's fixed.


Stelios