Re: Question about archive search behavior vs. --defsym

[Ian Lance Taylor <iant at google dot com>]

Mark Mitchell <mark@codesourcery.com> writes:

> On 9/8/2010 11:19 PM, Ian Lance Taylor wrote:
>
>>> $ gcc main.c -Wl,--defsym=f=4 -L. -lf
>>>
>>> pulls in f.o from libf.a even though the symbol is already defined.
>
>> It's a phase ordering problem.  Objects are pulled in from archives
>> before symbol assignments are processed.
>
>> I think this has to be considered a bug.
>
> OK.  Is this a structurally hard thing to fix?  Or just something that
> would take some effort?  And, does GOLD handle this correctly?

Gold has the same problem.

I think it would be fairly easy to fix.  Basically as soon as a --defsym
or symbol assignment in a linker script is read, the linker would have
to make a symbol table entry for the defined symbol.  It would then have
to fill in the values later.

Ian