yann@1: See http://gcc.gnu.org/ml/gcc/2003-08/msg00959.html
yann@1: 
yann@1: Compiling glibc-2.3.2 with a gcc-3.4 snapshot, I'm seeing
yann@1: a whole bunch of warnings like this:
yann@1: 
yann@1: ../string/bits/string2.h:80: warning: `packed' attribute ignored
yann@1: ../string/bits/string2.h:81: warning: `packed' attribute ignored
yann@1: ...
yann@1: 
yann@1: Looks like it was bad code that was silently ignored by previous compilers.
yann@1: Ulrich fixed it as follows:
yann@1: 
yann@1: ===================================================================
yann@1: RCS file: /cvs/glibc/libc/string/bits/string2.h,v
yann@1: retrieving revision 1.68
yann@1: retrieving revision 1.69
yann@1: diff -u -r1.68 -r1.69
yann@1: --- libc/string/bits/string2.h	2002/05/25 06:10:18	1.68
yann@1: +++ libc/string/bits/string2.h	2003/08/20 00:07:37	1.69
yann@1: @@ -1,5 +1,5 @@
yann@1:  /* Machine-independant string function optimizations.
yann@1: -   Copyright (C) 1997,1998,1999,2000,2001,2002 Free Software Foundation, Inc.
yann@1: +   Copyright (C) 1997-2002, 2003 Free Software Foundation, Inc.
yann@1:     This file is part of the GNU C Library.
yann@1:     Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
yann@1:  
yann@1: @@ -76,7 +76,7 @@
yann@1:     use unaligned memory accesses.  */
yann@1:  # define __STRING2_COPY_TYPE(N) \
yann@1:    typedef struct { unsigned char __arr[N]; }				      \
yann@1: -    __STRING2_COPY_ARR##N __attribute__ ((packed))
yann@1: +    __attribute__ ((__packed__)) __STRING2_COPY_ARR##N
yann@1:  __STRING2_COPY_TYPE (2);
yann@1:  __STRING2_COPY_TYPE (3);
yann@1:  __STRING2_COPY_TYPE (4);