1 See http://gcc.gnu.org/ml/gcc/2003-08/msg00959.html
3 Compiling glibc-2.3.2 with a gcc-3.4 snapshot, I'm seeing
4 a whole bunch of warnings like this:
6 ../string/bits/string2.h:80: warning: `packed' attribute ignored
7 ../string/bits/string2.h:81: warning: `packed' attribute ignored
10 Looks like it was bad code that was silently ignored by previous compilers.
11 Ulrich fixed it as follows:
13 ===================================================================
14 RCS file: /cvs/glibc/libc/string/bits/string2.h,v
15 retrieving revision 1.68
16 retrieving revision 1.69
18 --- libc/string/bits/string2.h 2002/05/25 06:10:18 1.68
19 +++ libc/string/bits/string2.h 2003/08/20 00:07:37 1.69
21 /* Machine-independant string function optimizations.
22 - Copyright (C) 1997,1998,1999,2000,2001,2002 Free Software Foundation, Inc.
23 + Copyright (C) 1997-2002, 2003 Free Software Foundation, Inc.
24 This file is part of the GNU C Library.
25 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
28 use unaligned memory accesses. */
29 # define __STRING2_COPY_TYPE(N) \
30 typedef struct { unsigned char __arr[N]; } \
31 - __STRING2_COPY_ARR##N __attribute__ ((packed))
32 + __attribute__ ((__packed__)) __STRING2_COPY_ARR##N
33 __STRING2_COPY_TYPE (2);
34 __STRING2_COPY_TYPE (3);
35 __STRING2_COPY_TYPE (4);