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Re: oskit/mach entropy trouble

From: ddavies
Subject: Re: oskit/mach entropy trouble
Date: 05 Apr 2003 15:27:47 -0500
User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.2

I suspect that what's happening too.  The trouble is that
liboskit_dev.a hasn't changed!  It's nm output is the same with and
without my changes.  Do you happen to know what the size refered to in
the message actually means?

Derek (Neal H. Walfield) writes:

> > Also, does anyone know what is meant by the 'size' of a function
> > symbol?  Ie, "/usr/bin/ld: Warning: size of symbol `osenv_wakeup'
> > changed from 26 to 42 in
> > /usr/local/lib/oskit/../liboskit_dev.a(sleep.o)".  What does the size
> > mean?  Reading the ELF spec hasn't helped me with this, nor has
> > googling, nor has asking in #hurd at random times.
> I suspect you have the following problem: you are adding a file,
> `new.o', which contains a function `foo'.  There is a module `m' which
> which references functions `foo' and `bar'.  There is a second file,
> `orig.o', which contains functions `foo' and `bar'.  The link order
> is:
>   gcc m new.o orig.o
> Thus, `foo' is taken from `new.o' (since `foo' is undefined after
> reading `m').  Then `orig.o' is added (since `bar' is undefined at
> that point in the link) but since we must add files (and not
> functions) we end up with `foo' being redefined!

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