This is the mail archive of the mailing list for the GCC project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]


"H.J. Lu" <> writes:

> On Fri, Apr 20, 2012 at 3:59 PM, Ian Lance Taylor <> wrote:
>> "H.J. Lu" <> writes:
>>> On Fri, Apr 20, 2012 at 3:10 PM, Cary Coutant <> wrote:
>>>>> We only have very few bits to in STB_XXX field.
>>>> This is exactly why I'm not in favor of this extension. The feature
>>>> doesn't seem compelling enough to use up one of these precious
>>>> reserved values (in fact, you're using the next-to-last one that's
>>>> reserved for OS use).
>>>> You want a backup definition? Put a weak def at the end of the link line.
>>> It doesn't work for us since the backup definition is
>>> always used even if there is a normal definition in
>>> a shared library or an archive.
>> Can you expand on that? ÂHow can you refer to the backup definition if
>> there is a normal definition?
> We need a definition for symbol, foo.  Since we don't know if there
> is a definition of foo at the final link time.  We provide the backup
> definition for foo.  The backup one is ignored if there is a normal one in
> an archive or DSO at link time.

That use case would be satisfied by Cary's suggestion of adding a weak
definition of the symbol in an object included at the end of the link


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]