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Re: Update LTO plugin interface
"H.J. Lu" <hjl.tools@gmail.com> writes:
> On Wed, Dec 1, 2010 at 5:53 PM, Ian Lance Taylor <iant@google.com> wrote:
>
>> Or I'll rephrase: are there any cases for which using -pass-through for
>> the set of libraries that the gcc driver automatically adds to the end
>> of the link line would not be a complete solution?
>>
>> I'm not saying -pass-through is the solution we should be using. ÂIt's
>> clearly a bit of a hack. ÂHowever, I am asking the question seriously,
>> because if we have to do a complete relink, then let's do a complete
>> relink, but if we don't have to do one, let's definitely not.
>
> Nothing can't be solved with a hack :-).
I propose that we add a new linker option: --plugin-callback. At each
point where this option appears on the command line, the linker will
call a new plugin callback entry point. The LTO plugin will replace the
all_symbols_read callback with this one. We will have the gcc driver
run the linker more or less like this:
object-files -lc -lgcc --plugin-callback -lc -lgcc crtend.o crtn.o
Ian