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Re: collect2 always built?
- To: mrs at wrs dot com (Mike Stump)
- Subject: Re: collect2 always built?
- From: Joe Buck <jbuck at synopsys dot com>
- Date: Tue, 3 Feb 98 12:10:50 PST
- Cc: jason at cygnus dot com, jbuck at synopsys dot com, egcs at cygnus dot com
> > If someone has ELF and the latest GNU ld, is there ever a situation where
> > they would want to use -frepo?
>
> I think so. Speed. I predict that there are cases where using -frepo
> will yield smaller .o files, and will take less time to generate them
> and less time to link them.
I would be amazed. My experience with -frepo is that it is dog-slow, and
with 2.7.2 I saw as many as ten link-recompile passes on relatively small
programs that used STL. This should be better (fewer passes) with egcs
because templates are inlined more readily, but where templates call other
templates the work can be considerable.
> Though I admit I have never benchmarked it.
That is quite apparent.
> Also, this is probably
> only an issue for large projects (it takes an hour to link, type
> ones).
There are other problems with -frepo for large projects, having to do with
library reuse.