linux.h revision 146895 
1/* Definitions of target machine for GNU compiler,
2   for PowerPC machines running Linux.
3   Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
4   Free Software Foundation, Inc.
5   Contributed by Michael Meissner (meissner@cygnus.com).
6
7   This file is part of GCC.
8
9   GCC is free software; you can redistribute it and/or modify it
10   under the terms of the GNU General Public License as published
11   by the Free Software Foundation; either version 2, or (at your
12   option) any later version.
13
14   GCC is distributed in the hope that it will be useful, but WITHOUT
15   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
17   License for more details.
18
19   You should have received a copy of the GNU General Public License
20   along with GCC; see the file COPYING.  If not, write to the
21   Free Software Foundation, 59 Temple Place - Suite 330, Boston,
22   MA 02111-1307, USA.  */
23
24#undef MD_EXEC_PREFIX
25#undef MD_STARTFILE_PREFIX
26
27/* Linux doesn't support saving and restoring 64-bit regs in a 32-bit
28   process.  */
29#define OS_MISSING_POWERPC64 1
30
31/* glibc has float and long double forms of math functions.  */
32#undef  TARGET_C99_FUNCTIONS
33#define TARGET_C99_FUNCTIONS 1
34
35#undef  TARGET_OS_CPP_BUILTINS
36#define TARGET_OS_CPP_BUILTINS()          \
37  do                                      \
38    {                                     \
39      builtin_define_std ("PPC");         \
40      builtin_define_std ("powerpc");     \
41      builtin_assert ("cpu=powerpc");     \
42      builtin_assert ("machine=powerpc"); \
43      TARGET_OS_SYSV_CPP_BUILTINS ();	  \
44    }                                     \
45  while (0)
46
47#undef	CPP_OS_DEFAULT_SPEC
48#define CPP_OS_DEFAULT_SPEC "%(cpp_os_linux)"
49
50/* The GNU C++ standard library currently requires _GNU_SOURCE being
51   defined on glibc-based systems. This temporary hack accomplishes this,
52   it should go away as soon as libstdc++-v3 has a real fix.  */
53#undef  CPLUSPLUS_CPP_SPEC
54#define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
55
56#undef  LINK_SHLIB_SPEC
57#define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}}"
58
59#undef	LIB_DEFAULT_SPEC
60#define LIB_DEFAULT_SPEC "%(lib_linux)"
61
62#undef	STARTFILE_DEFAULT_SPEC
63#define STARTFILE_DEFAULT_SPEC "%(startfile_linux)"
64
65#undef	ENDFILE_DEFAULT_SPEC
66#define ENDFILE_DEFAULT_SPEC "%(endfile_linux)"
67
68#undef	LINK_START_DEFAULT_SPEC
69#define LINK_START_DEFAULT_SPEC "%(link_start_linux)"
70
71#undef	LINK_OS_DEFAULT_SPEC
72#define LINK_OS_DEFAULT_SPEC "%(link_os_linux)"
73
74#define LINK_GCC_C_SEQUENCE_SPEC \
75  "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
76
77#undef  TARGET_VERSION
78#define TARGET_VERSION fprintf (stderr, " (PowerPC GNU/Linux)");
79
80/* Override rs6000.h definition.  */
81#undef  ASM_APP_ON
82#define ASM_APP_ON "#APP\n"
83
84/* Override rs6000.h definition.  */
85#undef  ASM_APP_OFF
86#define ASM_APP_OFF "#NO_APP\n"
87
88/* For backward compatibility, we must continue to use the AIX
89   structure return convention.  */
90#undef  DRAFT_V4_STRUCT_RET
91#define DRAFT_V4_STRUCT_RET 1
92
93/* We are 32-bit all the time, so optimize a little.  */
94#undef TARGET_64BIT
95#define TARGET_64BIT 0
96
97/* We don't need to generate entries in .fixup, except when
98   -mrelocatable or -mrelocatable-lib is given.  */
99#undef RELOCATABLE_NEEDS_FIXUP
100#define RELOCATABLE_NEEDS_FIXUP \
101  (target_flags & target_flags_explicit & MASK_RELOCATABLE)
102
103#define TARGET_ASM_FILE_END file_end_indicate_exec_stack
104
105#define TARGET_HAS_F_SETLKW
106
107#ifdef IN_LIBGCC2
108#include "config/rs6000/linux-unwind.h"
109#endif
110