linux.h revision 18334 
1/* Definitions for Linux with ELF format
2   Copyright (C) 1995 Free Software Foundation, Inc.
3   Contributed by Eric Youngdale.
4   Modified for stabs-in-ELF by H.J. Lu.
5
6This file is part of GNU CC.
7
8GNU CC is free software; you can redistribute it and/or modify
9it under the terms of the GNU General Public License as published by
10the Free Software Foundation; either version 2, or (at your option)
11any later version.
12
13GNU CC is distributed in the hope that it will be useful,
14but WITHOUT ANY WARRANTY; without even the implied warranty of
15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16GNU General Public License for more details.
17
18You should have received a copy of the GNU General Public License
19along with GNU CC; see the file COPYING.  If not, write to
20the Free Software Foundation, 59 Temple Place - Suite 330,
21Boston, MA 02111-1307, USA.  */
22
23/* Don't assume anything about the header files. */
24#define NO_IMPLICIT_EXTERN_C
25
26#undef HAVE_ATEXIT
27#define HAVE_ATEXIT
28
29/* Linux uses ctype from glibc.a. I am not sure how complete it is.
30   For now, we play safe. It may change later. */
31
32#if 0
33#undef MULTIBYTE_CHARS
34#define MULTIBYTE_CHARS 1
35#endif
36
37/* There are conflicting reports about whether this system uses
38   a different assembler syntax.  wilson@cygnus.com says # is right.  */
39#undef COMMENT_BEGIN
40#define COMMENT_BEGIN "#"
41
42#undef ASM_APP_ON
43#define ASM_APP_ON "#APP\n"
44
45#undef ASM_APP_OFF
46#define ASM_APP_OFF "#NO_APP\n"
47
48/* Use stabs instead of DWARF debug format.  */
49#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
50#include "svr4.h"
51
52#undef MD_EXEC_PREFIX
53#undef MD_STARTFILE_PREFIX
54
55/* Output at beginning of assembler file.  */
56/* The .file command should always begin the output.  */
57#undef ASM_FILE_START
58#define ASM_FILE_START(FILE)						\
59  do {									\
60	output_file_directive (FILE, main_input_filename);		\
61	fprintf (FILE, "\t.version\t\"01.01\"\n");			\
62  } while (0)
63
64#undef	LIBGCC_SPEC
65#define LIBGCC_SPEC \
66  "%{!shared:-lgcc}"
67
68
69/* Provide a STARTFILE_SPEC appropriate for Linux.  Here we add
70   the Linux magical crtbegin.o file (see crtstuff.c) which
71   provides part of the support for getting C++ file-scope static
72   object constructed before entering `main'. */
73
74#undef	STARTFILE_SPEC
75#define STARTFILE_SPEC \
76  "%{!shared: \
77     %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}\
78   crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
79
80/* Provide a ENDFILE_SPEC appropriate for Linux.  Here we tack on
81   the Linux magical crtend.o file (see crtstuff.c) which
82   provides part of the support for getting C++ file-scope static
83   object constructed before entering `main', followed by a normal
84   Linux "finalizer" file, `crtn.o'.  */
85
86#undef	ENDFILE_SPEC
87#define ENDFILE_SPEC \
88  "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
89