[src/trunk]: src/share/man/man4 Document COMPAT_AOUT_M68K.

[tsutsui <tsutsui%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/ce86211a2a89
branches:  trunk
changeset: 508167:ce86211a2a89
user:      tsutsui <tsutsui%NetBSD.org@localhost>
date:      Sat Apr 07 12:31:17 2001 +0000

description:
Document COMPAT_AOUT_M68K.

diffstat:

 share/man/man4/options.4 |  17 ++++++++++++++++-
 1 files changed, 16 insertions(+), 1 deletions(-)

diffs (31 lines):

diff -r f204db2d0c80 -r ce86211a2a89 share/man/man4/options.4
--- a/share/man/man4/options.4  Sat Apr 07 12:28:55 2001 +0000
+++ b/share/man/man4/options.4  Sat Apr 07 12:31:17 2001 +0000
@@ -1,4 +1,4 @@
-.\"    $NetBSD: options.4,v 1.134 2001/04/04 10:52:23 wiz Exp $
+.\"    $NetBSD: options.4,v 1.135 2001/04/07 12:31:17 tsutsui Exp $
 .\"
 .\" Copyright (c) 1996
 .\"    Perry E. Metzger.  All rights reserved.
@@ -252,6 +252,21 @@
 compatibility with 32-bit SVR4 applications built for the same architecture.
 This is currently limited to the sparc64 port, and only applicable for
 64-bit kernels.
+.It Cd options COMPAT_AOUT_M68K
+On m68k architectures which have switched to ELF,
+this enable binary compatibility with
+.Nx Ns Tn /m68k
+.Xr a.out 5
+executables on
+.Nx Ns Tn /m68k
+ELF kernel.
+This handles alignment incompatibility of m68k ABI between
+a.out and ELF which causes the structure padding differences.
+Currently only some system calls which use
+.Va struct stat
+are adjusted and some binaries which use
+.Xr sysctl 3
+to retrieve network details would not work properly.
 .El
 .Ss Debugging Options
 .Bl -ohang