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Date: Sun, 18 Jan 2004 22:50:00 -0000
From: Chris Lattner <sabre@nondot.org>
To: Jan Hubicka <jh@suse.cz>
Cc: Jan Hubicka <hubicka@ucw.cz>, Richard Henderson <rth@redhat.com>,
	"Kaveh R. Ghazi" <ghazi@caip.rutgers.edu>, <ian@wasabisystems.com>,
	<gcc@gcc.gnu.org>, "Joseph S. Myers" <jsm@polyomino.org.uk>
Subject: Re: Can we speed up the gcc_target structure?
In-Reply-To: <20040118224838.GL5119@kam.mff.cuni.cz>
Message-ID: <Pine.LNX.4.44.0401181708570.18959-100000@nondot.org>
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On Sun, 18 Jan 2004, Jan Hubicka wrote:
> If you mark no symbols via special attribute, only main should be
> external.  If you mark more, you get more.

Ok, I see.

> > > I suppose this is mostly equivalent to what LLVM have except for the
> > > fact that list of symbols with external linkage is boundled in the
> > > source itself, instead of being in separate file. Do you have any
> > > experience with the separate file having considerable benefits?
> >
> > I'm not sure if I understand what you mean here, can you please clarify?
>
> You mentioned that instead of using attribute in the source file, you
> get list of functions.  From here the lists are comming?

We use an external file (a linker script basically) to decide the list.
You can also specify the list with a -Wl option.

> > (for example) dynamically load shared objects that call back into the main
> > program.  People will get unhappy if 'gimp' doesn't work in this mode, for
> > example.
>
> I expect people to just mark the interface functions via the attribute.

Ok, great.  :)

-Chris

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