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1.1 root 1: /* Compilation switch flag definitions for GNU CC.
2: Copyright (C) 1987, 1988 Free Software Foundation, Inc.
3:
4: This file is part of GNU CC.
5:
6: GNU CC is free software; you can redistribute it and/or modify
7: it under the terms of the GNU General Public License as published by
8: the Free Software Foundation; either version 2, or (at your option)
9: any later version.
10:
11: GNU CC is distributed in the hope that it will be useful,
12: but WITHOUT ANY WARRANTY; without even the implied warranty of
13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14: GNU General Public License for more details.
15:
16: You should have received a copy of the GNU General Public License
17: along with GNU CC; see the file COPYING. If not, write to
18: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
19:
20: /* Name of the input .c file being compiled. */
21: extern char *main_input_filename;
22:
23: enum debug_info_type
24: {
25: NO_DEBUG, /* Write no debug info. */
26: DBX_DEBUG, /* Write BSD .stabs for DBX (using dbxout.c). */
27: SDB_DEBUG, /* Write COFF for (old) SDB (using sdbout.c). */
28: DWARF_DEBUG, /* Write Dwarf debug info (using dwarfout.c). */
29: XCOFF_DEBUG /* Write IBM/Xcoff debug info (using dbxout.c). */
30: };
31:
32: /* Specify which kind of debugging info to generate. */
33: extern enum debug_info_type write_symbols;
34:
35: enum debug_info_level
36: {
37: DINFO_LEVEL_NONE, /* Write no debugging info. */
38: DINFO_LEVEL_TERSE, /* Write minimal info to support tracebacks only. */
39: DINFO_LEVEL_NORMAL, /* Write info for all declarations (and line table). */
40: DINFO_LEVEL_VERBOSE /* Write normal info plus #define/#undef info. */
41: };
42:
43: /* Specify how much debugging info to generate. */
44: extern enum debug_info_level debug_info_level;
45:
46: /* Nonzero means use GNU-only extensions in the generated symbolic
47: debugging information. */
48: extern int use_gnu_debug_info_extensions;
49:
50: /* Nonzero means do optimizations. -opt. */
51:
52: extern int optimize;
53:
54: /* Nonzero means do stupid register allocation. -noreg.
55: Currently, this is 1 if `optimize' is 0. */
56:
57: extern int obey_regdecls;
58:
59: /* Don't print functions as they are compiled and don't print
60: times taken by the various passes. -quiet. */
61:
62: extern int quiet_flag;
63:
64: /* Don't print warning messages. -w. */
65:
66: extern int inhibit_warnings;
67:
68: /* Do print extra warnings (such as for uninitialized variables). -W. */
69:
70: extern int extra_warnings;
71:
72: /* Nonzero to warn about unused local variables. */
73:
74: extern int warn_unused;
75:
76: /* Nonzero means warn if inline function is too large. */
77:
78: extern int warn_inline;
79:
80: /* Nonzero to warn about variables used before they are initialized. */
81:
82: extern int warn_uninitialized;
83:
84: /* Nonzero means warn about all declarations which shadow others. */
85:
86: extern int warn_shadow;
87:
88: /* Warn if a switch on an enum fails to have a case for every enum value. */
89:
90: extern int warn_switch;
91:
92: /* Nonzero means warn about function definitions that default the return type
93: or that use a null return and have a return-type other than void. */
94:
95: extern int warn_return_type;
96:
97: /* Nonzero means warn about pointer casts that increase the required
98: alignment of the target type (and might therefore lead to a crash
99: due to a misaligned access). */
100:
101: extern int warn_cast_align;
102:
103: /* Nonzero means warn that dbx info for template class methods isn't fully
104: supported yet. */
105:
106: extern int warn_template_debugging;
107:
108: /* Nonzero means warn about any identifiers that match in the first N
109: characters. The value N is in `id_clash_len'. */
110:
111: extern int warn_id_clash;
112: extern int id_clash_len;
113:
114: /* Warn if a function returns an aggregate,
115: since there are often incompatible calling conventions for doing this. */
116:
117: extern int warn_aggregate_return;
118:
119: /* Nonzero if generating code to do profiling. */
120:
121: extern int profile_flag;
122:
123: /* Nonzero if generating code to do profiling on the basis of basic blocks. */
124:
125: extern int profile_block_flag;
126:
127: /* Nonzero for -pedantic switch: warn about anything
128: that standard C forbids. */
129:
130: extern int pedantic;
131:
132: /* Temporarily suppress certain warnings.
133: This is set while reading code from a system header file. */
134:
135: extern int in_system_header;
136:
137: /* Nonzero for -dp: annotate the assembly with a comment describing the
138: pattern and alternative used. */
139:
140: extern int flag_print_asm_name;
141:
142: /* Now the symbols that are set with `-f' switches. */
143:
144: /* Nonzero means `char' should be signed. */
145:
146: extern int flag_signed_char;
147:
148: /* Nonzero means give an enum type only as many bytes as it needs. */
149:
150: extern int flag_short_enums;
151:
152: /* Nonzero for -fcaller-saves: allocate values in regs that need to
153: be saved across function calls, if that produces overall better code.
154: Optional now, so people can test it. */
155:
156: extern int flag_caller_saves;
157:
158: /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
159:
160: extern int flag_pcc_struct_return;
161:
162: /* Nonzero for -fforce-mem: load memory value into a register
163: before arithmetic on it. This makes better cse but slower compilation. */
164:
165: extern int flag_force_mem;
166:
167: /* Nonzero for -fforce-addr: load memory address into a register before
168: reference to memory. This makes better cse but slower compilation. */
169:
170: extern int flag_force_addr;
171:
172: /* Nonzero for -fdefer-pop: don't pop args after each function call;
173: instead save them up to pop many calls' args with one insns. */
174:
175: extern int flag_defer_pop;
176:
177: /* Nonzero for -ffloat-store: don't allocate floats and doubles
178: in extended-precision registers. */
179:
180: extern int flag_float_store;
181:
182: /* Nonzero enables strength-reduction in loop.c. */
183:
184: extern int flag_strength_reduce;
185:
186: /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
187: number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
188: UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
189: unrolled. */
190:
191: extern int flag_unroll_loops;
192:
193: /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
194: This is generally not a win. */
195:
196: extern int flag_unroll_all_loops;
197:
198: /* Nonzero for -fcse-follow-jumps:
199: have cse follow jumps to do a more extensive job. */
200:
201: extern int flag_cse_follow_jumps;
202:
203: /* Nonzero for -fcse-skip-blocks:
204: have cse follow a branch around a block. */
205:
206: extern int flag_cse_skip_blocks;
207:
208: /* Nonzero for -fexpensive-optimizations:
209: perform miscellaneous relatively-expensive optimizations. */
210: extern int flag_expensive_optimizations;
211:
212: /* Nonzero for -fwritable-strings:
213: store string constants in data segment and don't uniquize them. */
214:
215: extern int flag_writable_strings;
216:
217: /* Nonzero means don't put addresses of constant functions in registers.
218: Used for compiling the Unix kernel, where strange substitutions are
219: done on the assembly output. */
220:
221: extern int flag_no_function_cse;
222:
223: /* Nonzero for -fomit-frame-pointer:
224: don't make a frame pointer in simple functions that don't require one. */
225:
226: extern int flag_omit_frame_pointer;
227:
228: /* Nonzero to inhibit use of define_optimization peephole opts. */
229:
230: extern int flag_no_peephole;
231:
232: /* Nonzero means all references through pointers are volatile. */
233:
234: extern int flag_volatile;
235:
236: /* Nonzero means treat all global and extern variables as global. */
237:
238: extern int flag_volatile_global;
239:
240: /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
241: operations in the interest of optimization. For example it allows
242: GCC to assume arguments to sqrt are nonnegative numbers, allowing
243: faster code for sqrt to be generated. */
244:
245: extern int flag_fast_math;
246:
247: /* Nonzero means make functions that look like good inline candidates
248: go inline. */
249:
250: extern int flag_inline_functions;
251:
252: /* Nonzero for -fkeep-inline-functions: even if we make a function
253: go inline everywhere, keep its definition around for debugging
254: purposes. */
255:
256: extern int flag_keep_inline_functions;
257:
258: /* Nonzero means that functions declared `inline' will be treated
259: as `static'. Prevents generation of zillions of copies of unused
260: static inline functions; instead, `inlines' are written out
261: only when actually used. Used in conjunction with -g. Also
262: does the right thing with #pragma interface. */
263:
264: extern int flag_no_inline;
265:
266: /* Nonzero if we are only using compiler to check syntax errors. */
267:
268: extern int flag_syntax_only;
269:
270: /* Nonzero means we should save auxiliary info into a .X file. */
271:
272: extern int flag_gen_aux_info;
273:
274: /* Nonzero means make the text shared if supported. */
275:
276: extern int flag_shared_data;
277:
278: /* flag_schedule_insns means schedule insns within basic blocks (before
279: local_alloc).
280: flag_schedule_insns_after_reload means schedule insns after
281: global_alloc. */
282:
283: extern int flag_schedule_insns;
284: extern int flag_schedule_insns_after_reload;
285:
286: /* Nonzero means put things in delayed-branch slots if supported. */
287:
288: extern int flag_delayed_branch;
289:
290: /* Nonzero means pretend it is OK to examine bits of target floats,
291: even if that isn't true. The resulting code will have incorrect constants,
292: but the same series of instructions that the native compiler would make. */
293:
294: extern int flag_pretend_float;
295:
296: /* Nonzero means change certain warnings into errors.
297: Usually these are warnings about failure to conform to some standard. */
298:
299: extern int flag_pedantic_errors;
300:
301: /* Nonzero means generate position-independent code.
302: This is not fully implemented yet. */
303:
304: extern int flag_pic;
305:
306: /* Nonzero means place uninitialized global data in the bss section. */
307:
308: extern int flag_no_common;
309:
310: /* -finhibit-size-directive inhibits output of .size for ELF.
311: This is used only for compiling crtstuff.c,
312: and it may be extended to other effects
313: needed for crtstuff.c on other systems. */
314: extern int flag_inhibit_size_directive;
315:
316: /* -fverbose-asm causes extra commentary information to be produced in
317: the generated assembly code (to make it more readable). This option
318: is generally only of use to those who actually need to read the
319: generated assembly code (perhaps while debugging the compiler itself). */
320:
321: extern int flag_verbose_asm;
322:
323: /* -fgnu-linker specifies use of the GNU linker for initializations.
324: -fno-gnu-linker says that collect will be used. */
325: extern int flag_gnu_linker;
326:
327: /* Other basic status info about current function. */
328:
329: /* Nonzero means current function must be given a frame pointer.
330: Set in stmt.c if anything is allocated on the stack there.
331: Set in reload1.c if anything is allocated on the stack there. */
332:
333: extern int frame_pointer_needed;
334:
335: /* Set nonzero if jump_optimize finds that control falls through
336: at the end of the function. */
337:
338: extern int can_reach_end;
339:
340: /* Nonzero if function being compiled receives nonlocal gotos
341: from nested functions. */
342:
343: extern int current_function_has_nonlocal_label;
344:
345: /* Nonzero if function being compiled has nonlocal gotos to parent
346: function. */
347:
348: extern int current_function_has_nonlocal_goto;
349:
350: /* Nonzero if an floating point precision controll pass is done. */
351:
352: extern int flag_fppc;
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