freebsd.h revision 49853 
1/* $Id: freebsd.h,v 1.15 1999/07/02 19:26:45 obrien Exp $ */
2/* Base configuration file for all FreeBSD targets.
3   Copyright (C) 1999 Free Software Foundation, Inc.
4
5This file is part of GNU CC.
6
7GNU CC is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2, or (at your option)
10any later version.
11
12GNU CC is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GNU CC; see the file COPYING.  If not, write to
19the Free Software Foundation, 59 Temple Place - Suite 330,
20Boston, MA 02111-1307, USA.  */
21
22/* Common FreeBSD configuration.
23   All FreeBSD architectures should include this file, which will specify
24   their commonalities.
25   Adapted from /usr/src/contrib/gcc/config/i386/freebsd.h &
26   egcs/gcc/config/i386/freebsd-elf.h version by David O'Brien  */
27
28
29/* Don't assume anything about the header files.  */
30#undef NO_IMPLICIT_EXTERN_C
31#define NO_IMPLICIT_EXTERN_C
32
33/* This defines which switch letters take arguments.  On FreeBSD, most of
34   the normal cases (defined in gcc.c) apply, and we also have -h* and
35   -z* options (for the linker) (comming from svr4).
36   We also have -R (alias --rpath), no -z, --soname (-h), --assert etc.  */
37
38#define FBSD_SWITCH_TAKES_ARG(CHAR) \
39  (DEFAULT_SWITCH_TAKES_ARG (CHAR) \
40   || (CHAR) == 'h' \
41   || (CHAR) == 'z' /* ignored by ld */ \
42   || (CHAR) == 'R')
43
44#define FBSD_WORD_SWITCH_TAKES_ARG(STR)					\
45  (DEFAULT_WORD_SWITCH_TAKES_ARG (STR)					\
46   || !strcmp (STR, "rpath") || !strcmp (STR, "rpath-link")		\
47   || !strcmp (STR, "soname") || !strcmp (STR, "defsym") 		\
48   || !strcmp (STR, "assert") || !strcmp (STR, "dynamic-linker"))
49
50/* Place spaces around this string.  We depend on string splicing to produce
51   the final CPP_PREDEFINES value.  */
52#define CPP_FBSD_PREDEFINES " -Dunix -D__FreeBSD__=4 -D__FreeBSD_cc_version=400002 -Asystem(unix) -Asystem(FreeBSD) "
53
54/* Provide a LIB_SPEC appropriate for FreeBSD.  Just select the appropriate
55   libc, depending on whether we're doing profiling.
56   (like the default, except no -lg, and no -p).  */
57#undef LIB_SPEC
58#define LIB_SPEC "%{!shared:%{!pg:%{!pthread:%{!kthread:-lc}%{kthread:-lpthread -lc}}%{pthread:-lc_r}}%{pg:%{!pthread:%{!kthread:-lc_p}%{kthread:-lpthread_p -lc_p}}%{pthread:-lc_r_p}}}"
59
60
61/* Code generation parameters.  */
62
63/* Don't default to pcc-struct-return, because gcc is the only compiler, and
64   we want to retain compatibility with older gcc versions
65   (even though the svr4 ABI for the i386 says that records and unions are
66   returned in memory).  */
67#undef DEFAULT_PCC_STRUCT_RETURN
68#define DEFAULT_PCC_STRUCT_RETURN 0
69
70/* Ensure we the configuration knows our system correctly so we can link with
71   libraries compiled with the native cc.  */
72#undef NO_DOLLAR_IN_LABEL
73
74/* Use more efficient ``thunks'' to implement C++ vtables.  XXX note that
75   this setting is claimed to have a few bugs by the EGCS maintainers.  They
76   believe the bugs will be worked out in EGCS 1.2.  */
77#undef DEFAULT_VTABLE_THUNKS
78#define DEFAULT_VTABLE_THUNKS 1
79
80
81/* Miscellaneous parameters.  */
82
83/* Tell libgcc2.c that FreeBSD targets support atexit(3).  */
84#define HAVE_ATEXIT
85
86/* Our malloc can allocte pagesized blocks efficiently.  The default size
87   of 4072 bytes is not optimal on the i386 nor the Alpha.  */
88#define OBSTACK_CHUNK_SIZE	(getpagesize())
89