2001-07-07 Toon Moene <toon@moene.indiv.nluug.nl>
[official-gcc.git] / gcc / defaults.h
blobc22f9cd997f34125f510b1dac3d9802537ec4708
1 /* Definitions of various defaults for tm.h macros.
2 Copyright (C) 1992, 1996, 1997, 1998, 1999, 2000, 2001
3 Free Software Foundation, Inc.
4 Contributed by Ron Guilmette (rfg@monkeys.com)
6 This file is part of GNU CC.
8 GNU CC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
11 any later version.
13 GNU CC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU CC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
23 #ifndef GCC_DEFAULTS_H
24 #define GCC_DEFAULTS_H
26 /* Define default standard character escape sequences. */
27 #ifndef TARGET_BELL
28 # define TARGET_BELL 007
29 # define TARGET_BS 010
30 # define TARGET_TAB 011
31 # define TARGET_NEWLINE 012
32 # define TARGET_VT 013
33 # define TARGET_FF 014
34 # define TARGET_CR 015
35 # define TARGET_ESC 033
36 #endif
38 /* Store in OUTPUT a string (made with alloca) containing
39 an assembler-name for a local static variable or function named NAME.
40 LABELNO is an integer which is different for each call. */
42 #ifndef ASM_FORMAT_PRIVATE_NAME
43 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
44 do { \
45 int len = strlen (NAME); \
46 char *temp = (char *) alloca (len + 3); \
47 temp[0] = 'L'; \
48 strcpy (&temp[1], (NAME)); \
49 temp[len + 1] = '.'; \
50 temp[len + 2] = 0; \
51 (OUTPUT) = (char *) alloca (strlen (NAME) + 11); \
52 ASM_GENERATE_INTERNAL_LABEL (OUTPUT, temp, LABELNO); \
53 } while (0)
54 #endif
56 #ifndef ASM_STABD_OP
57 #define ASM_STABD_OP "\t.stabd\t"
58 #endif
60 /* This is how to output an element of a case-vector that is absolute.
61 Some targets don't use this, but we have to define it anyway. */
63 #ifndef ASM_OUTPUT_ADDR_VEC_ELT
64 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
65 do { fprintf (FILE, "\t%s\t", ASM_LONG); \
66 ASM_OUTPUT_INTERNAL_LABEL (FILE, "L", (VALUE)); \
67 fputc ('\n', FILE); \
68 } while (0)
69 #endif
71 /* Provide default for ASM_OUTPUT_ALTERNATE_LABEL_NAME. */
72 #ifndef ASM_OUTPUT_ALTERNATE_LABEL_NAME
73 #define ASM_OUTPUT_ALTERNATE_LABEL_NAME(FILE,INSN) \
74 do { ASM_OUTPUT_LABEL(FILE,LABEL_ALTERNATE_NAME (INSN)); } while (0)
75 #endif
77 /* choose a reasonable default for ASM_OUTPUT_ASCII. */
79 #ifndef ASM_OUTPUT_ASCII
80 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
81 do { \
82 FILE *_hide_asm_out_file = (MYFILE); \
83 const unsigned char *_hide_p = (const unsigned char *) (MYSTRING); \
84 int _hide_thissize = (MYLENGTH); \
85 { \
86 FILE *asm_out_file = _hide_asm_out_file; \
87 const unsigned char *p = _hide_p; \
88 int thissize = _hide_thissize; \
89 int i; \
90 fprintf (asm_out_file, "\t.ascii \""); \
92 for (i = 0; i < thissize; i++) \
93 { \
94 register int c = p[i]; \
95 if (c == '\"' || c == '\\') \
96 putc ('\\', asm_out_file); \
97 if (ISPRINT(c)) \
98 putc (c, asm_out_file); \
99 else \
101 fprintf (asm_out_file, "\\%o", c); \
102 /* After an octal-escape, if a digit follows, \
103 terminate one string constant and start another. \
104 The Vax assembler fails to stop reading the escape \
105 after three digits, so this is the only way we \
106 can get it to parse the data properly. */ \
107 if (i < thissize - 1 && ISDIGIT(p[i + 1])) \
108 fprintf (asm_out_file, "\"\n\t.ascii \""); \
111 fprintf (asm_out_file, "\"\n"); \
114 while (0)
115 #endif
117 /* This is how we tell the assembler to equate two values. */
118 #ifdef SET_ASM_OP
119 #ifndef ASM_OUTPUT_DEF
120 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
121 do { fprintf ((FILE), "%s", SET_ASM_OP); \
122 assemble_name (FILE, LABEL1); \
123 fprintf (FILE, ","); \
124 assemble_name (FILE, LABEL2); \
125 fprintf (FILE, "\n"); \
126 } while (0)
127 #endif
128 #endif
130 /* This is how to output a reference to a user-level label named NAME. */
132 #ifndef ASM_OUTPUT_LABELREF
133 #define ASM_OUTPUT_LABELREF(FILE,NAME) asm_fprintf ((FILE), "%U%s", (NAME))
134 #endif
136 /* Allow target to print debug info labels specially. This is useful for
137 VLIW targets, since debug info labels should go into the middle of
138 instruction bundles instead of breaking them. */
140 #ifndef ASM_OUTPUT_DEBUG_LABEL
141 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
142 ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM)
143 #endif
145 /* This determines whether or not we support weak symbols. */
146 #ifndef SUPPORTS_WEAK
147 #ifdef ASM_WEAKEN_LABEL
148 #define SUPPORTS_WEAK 1
149 #else
150 #define SUPPORTS_WEAK 0
151 #endif
152 #endif
154 /* This determines whether or not we support link-once semantics. */
155 #ifndef SUPPORTS_ONE_ONLY
156 #ifdef MAKE_DECL_ONE_ONLY
157 #define SUPPORTS_ONE_ONLY 1
158 #else
159 #define SUPPORTS_ONE_ONLY 0
160 #endif
161 #endif
163 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
164 provide a weak attribute. Else define it to nothing.
166 This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
167 not available at that time.
169 Note, this is only for use by target files which we know are to be
170 compiled by GCC. */
171 #ifndef TARGET_ATTRIBUTE_WEAK
172 # if SUPPORTS_WEAK
173 # define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
174 # else
175 # define TARGET_ATTRIBUTE_WEAK
176 # endif
177 #endif
179 /* If the target supports init_priority C++ attribute, give
180 SUPPORTS_INIT_PRIORITY a nonzero value. */
181 #ifndef SUPPORTS_INIT_PRIORITY
182 #define SUPPORTS_INIT_PRIORITY 1
183 #endif /* SUPPORTS_INIT_PRIORITY */
185 /* If duplicate library search directories can be removed from a
186 linker command without changing the linker's semantics, give this
187 symbol a nonzero. */
188 #ifndef LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
189 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 0
190 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
192 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
193 the rest of the DWARF 2 frame unwind support is also provided. */
194 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
195 #define DWARF2_UNWIND_INFO 1
196 #endif
198 #if defined (DWARF2_UNWIND_INFO) && !defined (EH_FRAME_SECTION)
199 # if defined (EH_FRAME_SECTION_ASM_OP)
200 # define EH_FRAME_SECTION() eh_frame_section ()
201 # else
202 /* If we aren't using crtstuff to run ctors, don't use it for EH. */
203 # if defined (ASM_OUTPUT_SECTION_NAME) && defined (ASM_OUTPUT_CONSTRUCTOR)
204 # define EH_FRAME_SECTION_ASM_OP "\t.section\t.eh_frame,\"aw\""
205 # define EH_FRAME_SECTION() \
206 do { named_section (NULL_TREE, ".eh_frame", 0); } while (0)
207 # endif
208 # endif
209 #endif
211 /* If we have no definition for UNIQUE_SECTION, but do have the
212 ability to generate arbitrary sections, construct something
213 reasonable. */
214 #ifdef ASM_OUTPUT_SECTION_NAME
215 #ifndef UNIQUE_SECTION
216 #define UNIQUE_SECTION(DECL,RELOC) \
217 do { \
218 int len; \
219 const char *name; \
220 char *string; \
222 name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL)); \
223 /* Strip off any encoding in name. */ \
224 STRIP_NAME_ENCODING (name, name); \
226 len = strlen (name) + 1; \
227 string = alloca (len + 1); \
228 sprintf (string, ".%s", name); \
230 DECL_SECTION_NAME (DECL) = build_string (len, string); \
231 } while (0)
232 #endif
233 #ifndef UNIQUE_SECTION_P
234 #define UNIQUE_SECTION_P(DECL) 0
235 #endif
236 #endif
238 /* By default, we generate a label at the beginning and end of the
239 text section, and compute the size of the text section by
240 subtracting the two. However, on some platforms that doesn't
241 work, and we use the section itself, rather than a label at the
242 beginning of it, to indicate the start of the section. On such
243 platforms, define this to zero. */
244 #ifndef DWARF2_GENERATE_TEXT_SECTION_LABEL
245 #define DWARF2_GENERATE_TEXT_SECTION_LABEL 1
246 #endif
248 /* Supply a default definition for PROMOTE_PROTOTYPES. */
249 #ifndef PROMOTE_PROTOTYPES
250 #define PROMOTE_PROTOTYPES 0
251 #endif
253 /* Number of hardware registers that go into the DWARF-2 unwind info.
254 If not defined, equals FIRST_PSEUDO_REGISTER */
256 #ifndef DWARF_FRAME_REGISTERS
257 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
258 #endif
260 /* Default sizes for base C types. If the sizes are different for
261 your target, you should override these values by defining the
262 appropriate symbols in your tm.h file. */
264 #ifndef CHAR_TYPE_SIZE
265 #define CHAR_TYPE_SIZE BITS_PER_UNIT
266 #endif
268 #ifndef SHORT_TYPE_SIZE
269 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
270 #endif
272 #ifndef INT_TYPE_SIZE
273 #define INT_TYPE_SIZE BITS_PER_WORD
274 #endif
276 #ifndef LONG_TYPE_SIZE
277 #define LONG_TYPE_SIZE BITS_PER_WORD
278 #endif
280 #ifndef LONG_LONG_TYPE_SIZE
281 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
282 #endif
284 #ifndef WCHAR_TYPE_SIZE
285 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
286 #endif
288 #ifndef WCHAR_UNSIGNED
289 #define WCHAR_UNSIGNED 0
290 #endif
292 #ifndef FLOAT_TYPE_SIZE
293 #define FLOAT_TYPE_SIZE BITS_PER_WORD
294 #endif
296 #ifndef DOUBLE_TYPE_SIZE
297 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
298 #endif
300 #ifndef LONG_DOUBLE_TYPE_SIZE
301 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
302 #endif
304 #ifndef BUILD_VA_LIST_TYPE
305 #define BUILD_VA_LIST_TYPE(X) ((X) = ptr_type_node)
306 #endif
308 #ifndef PIC_OFFSET_TABLE_REGNUM
309 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
310 #endif
312 /* Type used by GCOV counters. Use 64bit data type if target supports
313 it. */
314 #if LONG_TYPE_SIZE >= 64
315 #define GCOV_TYPE_SIZE LONG_TYPE_SIZE
316 #else
317 #define GCOV_TYPE_SIZE LONG_LONG_TYPE_SIZE
318 #endif
321 /* By default, the preprocessor should be invoked the same way in C++
322 as in C. */
323 #ifndef CPLUSPLUS_CPP_SPEC
324 #ifdef CPP_SPEC
325 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
326 #endif
327 #endif
329 #ifndef ACCUMULATE_OUTGOING_ARGS
330 #define ACCUMULATE_OUTGOING_ARGS 0
331 #endif
333 /* Supply a default definition for PUSH_ARGS. */
334 #ifndef PUSH_ARGS
335 #ifdef PUSH_ROUNDING
336 #define PUSH_ARGS !ACCUMULATE_OUTGOING_ARGS
337 #else
338 #define PUSH_ARGS 0
339 #endif
340 #endif
342 /* Select a format to encode pointers in exception handling data. We
343 prefer those that result in fewer dynamic relocations. Assume no
344 special support here and encode direct references. */
345 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
346 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) DW_EH_PE_absptr
347 #endif
349 /* By default, the C++ compiler will use the lowest bit of the pointer
350 to function to indicate a pointer-to-member-function points to a
351 virtual member function. However, if FUNCTION_BOUNDARY indicates
352 function addresses aren't always even, the lowest bit of the delta
353 field will be used. */
354 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
355 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
356 (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
357 ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
358 #endif
360 /* True if it is possible to profile code that does not have a frame
361 pointer. */
363 #ifndef TARGET_ALLOWS_PROFILING_WITHOUT_FRAME_POINTER
364 #define TARGET_ALLOWS_PROFILING_WITHOUT_FRAME_POINTER true
365 #endif
367 /* Define this macro if you have any machine-specific builtin
368 functions that need to be defined. It should be a C expression
369 that performs the necessary setup. */
371 #ifndef MD_INIT_BUILTINS
372 #define MD_INIT_BUILTINS
373 #endif
375 #endif /* ! GCC_DEFAULTS_H */