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Re: kerne-2.4.0-test13pre3 with gcc-2.97
- To: Kaoru Fukui <k_fukui at highway dot ne dot jp>
- Subject: Re: kerne-2.4.0-test13pre3 with gcc-2.97
- From: Alexandre Oliva <aoliva at redhat dot com>
- Date: 24 Dec 2000 01:29:32 -0200
- Cc: <linuxppc-dev at lists dot linuxppc dot org>, <gcc at gcc dot gnu dot org>
- Organization: GCC Team, Red Hat
- References: <20001223145258.Postino-022361@smtp01.highway.ne.jp>
On Dec 23, 2000, Kaoru Fukui <k_fukui@highway.ne.jp> wrote:
> - unsigned char b[0];
> + unsigned char *b;
This change (and apparently all other changes you've made) are
definitely wrong. Zero-sized arrays as the last element of a
structure used to be an extension in GCC 2.95.2, that has been adopted
by C99 with a slightly different syntax, that GCC CVS supports: just
remove the `0' from between the braces.
With your change, you're changing what is supposed to be a structure
whose last element is a flexible array with a structure that ends with
a pointer to such an array, which means the array should be allocated
separately, and any access to it must de-reference an additional
pointer. You'd have to adjust all uses of such a pointer to make this
change. Could this be the reason why your modified kernel doesn't
work?
--
Alexandre Oliva Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer aoliva@{cygnus.com, redhat.com}
CS PhD student at IC-Unicamp oliva@{lsd.ic.unicamp.br, gnu.org}
Free Software Evangelist *Please* write to mailing lists, not to me