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

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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 for Rs6000 running LynxOS.
2 Copyright (C) 1995, 1996, 2000, 2002, 2003, 2004, 2005, 2007
3 Free Software Foundation, Inc.
4 Contributed by David Henkel-Wallace, Cygnus Support (gumby@cygnus.com)
5 Rewritten by Adam Nemet, LynuxWorks Inc.
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 /* Override the definition in sysv4.h. */
24
25 #undef TARGET_VERSION
26 #define TARGET_VERSION fputs (" (PowerPC/LynxOS)", stderr);
27
28 /* Undefine the definition to enable the LynxOS default from the
29 top-level lynx.h. */
30
31 #undef SUBTARGET_EXTRA_SPECS
32
33 /* Get rid off the spec definitions from rs6000/sysv4.h. */
34
35 #undef CPP_SPEC
36 #define CPP_SPEC \
37 "%{msoft-float: -D_SOFT_FLOAT} \
38 %(cpp_cpu) \
39 %(cpp_os_lynx)"
40
41 /* LynxOS only supports big-endian on PPC so we override the
42 definition from sysv4.h. Since the LynxOS 4.0 compiler was set to
43 return every structure in memory regardless of their size we have
44 to emulate the same behavior here with disabling the SVR4 structure
45 returning. */
46
47 #undef CC1_SPEC
48 #define CC1_SPEC \
49 "%{G*} %{mno-sdata:-msdata=none} \
50 %{maltivec:-mabi=altivec} \
51 -maix-struct-return"
52
53 #undef ASM_SPEC
54 #define ASM_SPEC \
55 "%(asm_cpu) \
56 %{,assembler|,assembler-with-cpp: %{mregnames} %{mno-regnames}}"
57
58 #undef STARTFILE_SPEC
59 #undef ENDFILE_SPEC
60 #undef LIB_SPEC
61 #undef LINK_SPEC
62 #define LINK_SPEC \
63 "%{!msdata=none:%{G*}} %{msdata=none:-G0} \
64 %(link_os_lynx)"
65
66 /* Override the definition from sysv4.h. */
67
68 #undef TARGET_OS_CPP_BUILTINS
69 #define TARGET_OS_CPP_BUILTINS() \
70 do \
71 { \
72 builtin_define ("__BIG_ENDIAN__"); \
73 builtin_define ("__powerpc__"); \
74 builtin_assert ("cpu=powerpc"); \
75 builtin_assert ("machine=powerpc"); \
76 builtin_define ("__PPC__"); \
77 } \
78 while (0)
79
80 /* Override the rs6000.h definition. */
81
82 #undef ASM_APP_ON
83 #define ASM_APP_ON "#APP\n"
84
85 /* Override the rs6000.h definition. */
86
87 #undef ASM_APP_OFF
88 #define ASM_APP_OFF "#NO_APP\n"
89
90 /* LynxOS does not do anything with .fixup plus let's not create
91 writable section for linkonce.r and linkonce.t. */
92
93 #undef RELOCATABLE_NEEDS_FIXUP
94
95 /* Override these from rs6000.h with the generic definition. */
96
97 #undef SIZE_TYPE
98 #undef ASM_OUTPUT_ALIGN
99 #undef PREFERRED_DEBUGGING_TYPE
100
101 /* The file rs6000.c defines TARGET_HAVE_TLS unconditionally to the
102 value of HAVE_AS_TLS. HAVE_AS_TLS is true as gas support for TLS
103 is detected by configure. Override the definition to false. */
104
105 #undef HAVE_AS_TLS
106 #define HAVE_AS_TLS 0
107
108 #ifdef CRT_BEGIN
109 /* This function is part of crtbegin*.o which is at the beginning of
110 the link and is called from .fini which is usually toward the end
111 of the executable. Make it longcall so that we don't limit the
112 text size of the executables to 32M. */
113
114 static void __do_global_dtors_aux (void) __attribute__ ((longcall));
115 #endif /* CRT_BEGIN */
116
117 #ifdef CRT_END
118 /* Similarly here. This function resides in crtend*.o which is toward
119 to end of the link and is called from .init which is at the
120 beginning. */
121
122 static void __do_global_ctors_aux (void) __attribute__ ((longcall));
123 #endif /* CRT_END */