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comparison gcc/config/svr4.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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1 /* Operating system specific defines to be used when targeting GCC for some
2 generic System V Release 4 system.
3 Copyright (C) 1991, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2007, 2008, 2009 Free Software Foundation, Inc.
5 Contributed by Ron Guilmette (rfg@monkeys.com).
6
7 This file is part of GCC.
8
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
12 any later version.
13
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 Under Section 7 of GPL version 3, you are granted additional
20 permissions described in the GCC Runtime Library Exception, version
21 3.1, as published by the Free Software Foundation.
22
23 You should have received a copy of the GNU General Public License and
24 a copy of the GCC Runtime Library Exception along with this program;
25 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
26 <http://www.gnu.org/licenses/>. */
27
28
29 /* To use this file, make up a line like that in config.gcc:
30
31 tm_file="$tm_file elfos.h svr4.h MACHINE/svr4.h"
32
33 where MACHINE is replaced by the name of the basic hardware that you
34 are targeting for. Then, in the file MACHINE/svr4.h, put any really
35 system-specific defines (or overrides of defines) which you find that
36 you need.
37 */
38
39 /* Define a symbol indicating that we are using svr4.h. */
40 #define USING_SVR4_H
41
42 /* Cpp, assembler, linker, library, and startfile spec's. */
43
44 /* This defines which switch letters take arguments. On svr4, most of
45 the normal cases (defined in gcc.c) apply, and we also have -h* and
46 -z* options (for the linker). Note however that there is no such
47 thing as a -T option for svr4. */
48
49 #undef SWITCH_TAKES_ARG
50 #define SWITCH_TAKES_ARG(CHAR) \
51 (DEFAULT_SWITCH_TAKES_ARG (CHAR) \
52 || (CHAR) == 'h' \
53 || (CHAR) == 'x' \
54 || (CHAR) == 'z')
55
56 /* This defines which multi-letter switches take arguments. On svr4,
57 there are no such switches except those implemented by GCC itself. */
58
59 #define WORD_SWITCH_TAKES_ARG(STR) \
60 (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) \
61 && strcmp (STR, "Tdata") && strcmp (STR, "Ttext") \
62 && strcmp (STR, "Tbss"))
63
64 /* Provide an ASM_SPEC appropriate for svr4.
65 If we're not using GAS, we try to support as
66 many of the specialized svr4 assembler options as seems reasonable,
67 given that there are certain options which we can't (or shouldn't)
68 support directly due to the fact that they conflict with other options
69 for other svr4 tools (e.g. ld) or with other options for GCC itself.
70 For example, we don't support the -o (output file) or -R (remove
71 input file) options because GCC already handles these things. We
72 also don't support the -m (run m4) option for the assembler because
73 that conflicts with the -m (produce load map) option of the svr4
74 linker. We do however allow passing arbitrary options to the svr4
75 assembler via the -Wa, option.
76
77 Note that gcc doesn't allow a space to follow -Y in a -Ym,* or -Yd,*
78 option.
79
80 The svr4 assembler wants '-' on the command line if it's expected to
81 read its stdin.
82 */
83
84 #ifdef USE_GAS
85 #define SVR4_ASM_SPEC \
86 "%{v:-V} %{Wa,*:%*}"
87 #else
88 #define SVR4_ASM_SPEC \
89 "%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
90 #endif
91
92 #undef ASM_SPEC
93 #define ASM_SPEC SVR4_ASM_SPEC
94
95 #define AS_NEEDS_DASH_FOR_PIPED_INPUT
96
97 /* Under svr4, the normal location of the `ld' and `as' programs is the
98 /usr/ccs/bin directory. */
99
100 #ifndef CROSS_DIRECTORY_STRUCTURE
101 #undef MD_EXEC_PREFIX
102 #define MD_EXEC_PREFIX "/usr/ccs/bin/"
103 #endif
104
105 /* Under svr4, the normal location of the various *crt*.o files is the
106 /usr/ccs/lib directory. */
107
108 #ifndef CROSS_DIRECTORY_STRUCTURE
109 #undef MD_STARTFILE_PREFIX
110 #define MD_STARTFILE_PREFIX "/usr/ccs/lib/"
111 #endif
112
113 /* Provide a LIB_SPEC appropriate for svr4. Here we tack on the default
114 standard C library (unless we are building a shared library). */
115
116 #undef LIB_SPEC
117 #define LIB_SPEC "%{!shared:%{!symbolic:-lc}}"
118
119 /* Provide an ENDFILE_SPEC appropriate for svr4. Here we tack on our own
120 magical crtend.o file (see crtstuff.c) which provides part of the
121 support for getting C++ file-scope static object constructed before
122 entering `main', followed by the normal svr3/svr4 "finalizer" file,
123 which is either `gcrtn.o' or `crtn.o'. */
124
125 #undef ENDFILE_SPEC
126 #define ENDFILE_SPEC "crtend.o%s %{pg:gcrtn.o%s}%{!pg:crtn.o%s}"
127
128 /* Provide a LINK_SPEC appropriate for svr4. Here we provide support
129 for the special GCC options -static, -shared, and -symbolic which
130 allow us to link things in one of these three modes by applying the
131 appropriate combinations of options at link-time. We also provide
132 support here for as many of the other svr4 linker options as seems
133 reasonable, given that some of them conflict with options for other
134 svr4 tools (e.g. the assembler). In particular, we do support the
135 -z*, -V, -b, -t, -Qy, -Qn, and -YP* options here, and the -e*, -l*,
136 -o*, -r, -s, -u*, and -L* options are directly supported by gcc.c
137 itself. We don't directly support the -m (generate load map)
138 option because that conflicts with the -m (run m4) option of the
139 svr4 assembler. We also don't directly support the svr4 linker's
140 -I* or -M* options because these conflict with existing GCC
141 options. We do however allow passing arbitrary options to the svr4
142 linker via the -Wl, option, in gcc.c. We don't support the svr4
143 linker's -a option at all because it is totally useless and because
144 it conflicts with GCC's own -a option.
145
146 Note that gcc doesn't allow a space to follow -Y in a -YP,* option.
147
148 When the -G link option is used (-shared and -symbolic) a final link is
149 not being done. */
150
151 #undef LINK_SPEC
152 #ifdef CROSS_DIRECTORY_STRUCTURE
153 #define LINK_SPEC "%{h*} %{v:-V} \
154 %{b} \
155 %{static:-dn -Bstatic} \
156 %{shared:-G -dy -z text} \
157 %{symbolic:-Bsymbolic -G -dy -z text} \
158 %{G:-G} \
159 %{YP,*} \
160 %{Qy:} %{!Qn:-Qy}"
161 #else
162 #define LINK_SPEC "%{h*} %{v:-V} \
163 %{b} \
164 %{static:-dn -Bstatic} \
165 %{shared:-G -dy -z text} \
166 %{symbolic:-Bsymbolic -G -dy -z text} \
167 %{G:-G} \
168 %{YP,*} \
169 %{!YP,*:%{p:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
170 %{!p:-Y P,/usr/ccs/lib:/usr/lib}} \
171 %{Qy:} %{!Qn:-Qy}"
172 #endif
173
174 /* Gcc automatically adds in one of the files /usr/ccs/lib/values-Xc.o
175 or /usr/ccs/lib/values-Xa.o for each final link step (depending
176 upon the other gcc options selected, such as -ansi). These files
177 each contain one (initialized) copy of a special variable called
178 `_lib_version'. Each one of these files has `_lib_version' initialized
179 to a different (enum) value. The SVR4 library routines query the
180 value of `_lib_version' at run to decide how they should behave.
181 Specifically, they decide (based upon the value of `_lib_version')
182 if they will act in a strictly ANSI conforming manner or not. */
183
184 #undef STARTFILE_SPEC
185 #define STARTFILE_SPEC "%{!shared: \
186 %{!symbolic: \
187 %{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}}}\
188 %{pg:gcrti.o%s}%{!pg:crti.o%s} \
189 %{ansi:values-Xc.o%s} \
190 %{!ansi:values-Xa.o%s} \
191 crtbegin.o%s"
192
193 /* The numbers used to denote specific machine registers in the System V
194 Release 4 DWARF debugging information are quite likely to be totally
195 different from the numbers used in BSD stabs debugging information
196 for the same kind of target machine. Thus, we undefine the macro
197 DBX_REGISTER_NUMBER here as an extra inducement to get people to
198 provide proper machine-specific definitions of DBX_REGISTER_NUMBER
199 (which is also used to provide DWARF registers numbers in dwarfout.c)
200 in their tm.h files which include this file. */
201
202 #undef DBX_REGISTER_NUMBER
203
204 /* Define the actual types of some ANSI-mandated types. (These
205 definitions should work for most SVR4 systems). */
206
207 #undef SIZE_TYPE
208 #define SIZE_TYPE "unsigned int"
209
210 #undef PTRDIFF_TYPE
211 #define PTRDIFF_TYPE "int"
212
213 #undef WCHAR_TYPE
214 #define WCHAR_TYPE "long int"
215
216 #undef WCHAR_TYPE_SIZE
217 #define WCHAR_TYPE_SIZE BITS_PER_WORD
218
219 #define TARGET_POSIX_IO