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comparison gcc/config/rs6000/linux.h @ 0:a06113de4d67

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first commit
author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
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children f6334be47118
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-1:000000000000 0:a06113de4d67
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,
4 2004, 2005, 2006, 2007 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 3, 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 COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
22
23 #undef MD_EXEC_PREFIX
24 #undef MD_STARTFILE_PREFIX
25
26 /* Linux doesn't support saving and restoring 64-bit regs in a 32-bit
27 process. */
28 #define OS_MISSING_POWERPC64 1
29
30 /* We use glibc _mcount for profiling. */
31 #define NO_PROFILE_COUNTERS 1
32
33 /* glibc has float and long double forms of math functions. */
34 #undef TARGET_C99_FUNCTIONS
35 #define TARGET_C99_FUNCTIONS (OPTION_GLIBC)
36
37 /* Whether we have sincos that follows the GNU extension. */
38 #undef TARGET_HAS_SINCOS
39 #define TARGET_HAS_SINCOS (OPTION_GLIBC)
40
41 #undef TARGET_OS_CPP_BUILTINS
42 #define TARGET_OS_CPP_BUILTINS() \
43 do \
44 { \
45 builtin_define_std ("PPC"); \
46 builtin_define_std ("powerpc"); \
47 builtin_assert ("cpu=powerpc"); \
48 builtin_assert ("machine=powerpc"); \
49 TARGET_OS_SYSV_CPP_BUILTINS (); \
50 } \
51 while (0)
52
53 #undef CPP_OS_DEFAULT_SPEC
54 #define CPP_OS_DEFAULT_SPEC "%(cpp_os_linux)"
55
56 /* The GNU C++ standard library currently requires _GNU_SOURCE being
57 defined on glibc-based systems. This temporary hack accomplishes this,
58 it should go away as soon as libstdc++-v3 has a real fix. */
59 #undef CPLUSPLUS_CPP_SPEC
60 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
61
62 #undef LINK_SHLIB_SPEC
63 #define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}}"
64
65 #undef LIB_DEFAULT_SPEC
66 #define LIB_DEFAULT_SPEC "%(lib_linux)"
67
68 #undef STARTFILE_DEFAULT_SPEC
69 #define STARTFILE_DEFAULT_SPEC "%(startfile_linux)"
70
71 #undef ENDFILE_DEFAULT_SPEC
72 #define ENDFILE_DEFAULT_SPEC "%(endfile_linux)"
73
74 #undef LINK_START_DEFAULT_SPEC
75 #define LINK_START_DEFAULT_SPEC "%(link_start_linux)"
76
77 #undef LINK_OS_DEFAULT_SPEC
78 #define LINK_OS_DEFAULT_SPEC "%(link_os_linux)"
79
80 #define LINK_GCC_C_SEQUENCE_SPEC \
81 "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
82
83 /* Use --as-needed -lgcc_s for eh support. */
84 #ifdef HAVE_LD_AS_NEEDED
85 #define USE_LD_AS_NEEDED 1
86 #endif
87
88 #undef TARGET_VERSION
89 #define TARGET_VERSION fprintf (stderr, " (PowerPC GNU/Linux)");
90
91 /* Override rs6000.h definition. */
92 #undef ASM_APP_ON
93 #define ASM_APP_ON "#APP\n"
94
95 /* Override rs6000.h definition. */
96 #undef ASM_APP_OFF
97 #define ASM_APP_OFF "#NO_APP\n"
98
99 /* For backward compatibility, we must continue to use the AIX
100 structure return convention. */
101 #undef DRAFT_V4_STRUCT_RET
102 #define DRAFT_V4_STRUCT_RET 1
103
104 /* We are 32-bit all the time, so optimize a little. */
105 #undef TARGET_64BIT
106 #define TARGET_64BIT 0
107
108 /* We don't need to generate entries in .fixup, except when
109 -mrelocatable or -mrelocatable-lib is given. */
110 #undef RELOCATABLE_NEEDS_FIXUP
111 #define RELOCATABLE_NEEDS_FIXUP \
112 (target_flags & target_flags_explicit & MASK_RELOCATABLE)
113
114 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
115
116 #define TARGET_POSIX_IO
117
118 #define MD_UNWIND_SUPPORT "config/rs6000/linux-unwind.h"
119
120 #ifdef TARGET_LIBC_PROVIDES_SSP
121 /* ppc32 glibc provides __stack_chk_guard in -0x7008(2). */
122 #define TARGET_THREAD_SSP_OFFSET -0x7008
123 #endif
124
125 #define POWERPC_LINUX
126
127 /* ppc linux has 128-bit long double support in glibc 2.4 and later. */
128 #ifdef TARGET_DEFAULT_LONG_DOUBLE_128
129 #define RS6000_DEFAULT_LONG_DOUBLE_SIZE 128
130 #endif