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1322177d | 1 | /* Compilation switch flag definitions for GCC. |
e295f317 | 2 | Copyright (C) 1987, 1988, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002, |
e04369ac | 3 | 2003, 2004, 2005 |
06ceef4e | 4 | Free Software Foundation, Inc. |
f7a29665 | 5 | |
1322177d | 6 | This file is part of GCC. |
f7a29665 | 7 | |
1322177d LB |
8 | GCC is free software; you can redistribute it and/or modify it under |
9 | the terms of the GNU General Public License as published by the Free | |
10 | Software Foundation; either version 2, or (at your option) any later | |
11 | version. | |
f7a29665 | 12 | |
1322177d LB |
13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
f7a29665 RS |
17 | |
18 | You should have received a copy of the GNU General Public License | |
1322177d | 19 | along with GCC; see the file COPYING. If not, write to the Free |
366ccddb KC |
20 | Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA |
21 | 02110-1301, USA. */ | |
f7a29665 | 22 | |
0e5921e8 ZW |
23 | #ifndef GCC_FLAGS_H |
24 | #define GCC_FLAGS_H | |
25 | ||
50431bc4 ZD |
26 | #include "options.h" |
27 | ||
f7a29665 RS |
28 | enum debug_info_type |
29 | { | |
30 | NO_DEBUG, /* Write no debug info. */ | |
31 | DBX_DEBUG, /* Write BSD .stabs for DBX (using dbxout.c). */ | |
32 | SDB_DEBUG, /* Write COFF for (old) SDB (using sdbout.c). */ | |
9a666dda | 33 | DWARF2_DEBUG, /* Write Dwarf v2 debug info (using dwarf2out.c). */ |
7a0c8d71 | 34 | XCOFF_DEBUG, /* Write IBM/Xcoff debug info (using dbxout.c). */ |
23d1aac4 | 35 | VMS_DEBUG, /* Write VMS debug info (using vmsdbgout.c). */ |
7a0c8d71 | 36 | VMS_AND_DWARF2_DEBUG /* Write VMS debug info (using vmsdbgout.c). |
23d1aac4 | 37 | and DWARF v2 debug info (using dwarf2out.c). */ |
f7a29665 RS |
38 | }; |
39 | ||
40 | /* Specify which kind of debugging info to generate. */ | |
41 | extern enum debug_info_type write_symbols; | |
42 | ||
df026186 GK |
43 | /* Names of debug_info_type, for error messages. */ |
44 | extern const char *const debug_type_names[]; | |
45 | ||
f7a29665 RS |
46 | enum debug_info_level |
47 | { | |
48 | DINFO_LEVEL_NONE, /* Write no debugging info. */ | |
49 | DINFO_LEVEL_TERSE, /* Write minimal info to support tracebacks only. */ | |
eebedaa5 | 50 | DINFO_LEVEL_NORMAL, /* Write info for all declarations (and line table). */ |
f7a29665 RS |
51 | DINFO_LEVEL_VERBOSE /* Write normal info plus #define/#undef info. */ |
52 | }; | |
53 | ||
54 | /* Specify how much debugging info to generate. */ | |
55 | extern enum debug_info_level debug_info_level; | |
56 | ||
79604d8f CH |
57 | /* Nonzero means use GNU-only extensions in the generated symbolic |
58 | debugging information. */ | |
df38ffef | 59 | extern bool use_gnu_debug_info_extensions; |
f7a29665 | 60 | |
d7afec4b ND |
61 | /* Enumerate visibility settings. */ |
62 | #ifndef SYMBOL_VISIBILITY_DEFINED | |
63 | #define SYMBOL_VISIBILITY_DEFINED | |
64 | enum symbol_visibility | |
65 | { | |
66 | VISIBILITY_DEFAULT, | |
67 | VISIBILITY_INTERNAL, | |
68 | VISIBILITY_HIDDEN, | |
69 | VISIBILITY_PROTECTED | |
70 | }; | |
71 | #endif | |
72 | ||
73 | /* The default visibility for all symbols (unless overridden). */ | |
74 | extern enum symbol_visibility default_visibility; | |
75 | ||
76 | struct visibility_flags | |
77 | { | |
78 | unsigned inpragma : 1; /* True when in #pragma GCC visibility. */ | |
79 | unsigned inlines_hidden : 1; /* True when -finlineshidden in effect. */ | |
80 | }; | |
81 | ||
82 | /* Global visibility options. */ | |
83 | extern struct visibility_flags visibility_options; | |
84 | ||
f7a29665 RS |
85 | /* Nonzero means do optimizations. -opt. */ |
86 | ||
87 | extern int optimize; | |
88 | ||
c6aded7c AG |
89 | /* Nonzero means optimize for size. -Os. */ |
90 | ||
91 | extern int optimize_size; | |
92 | ||
65ca2d60 PE |
93 | /* Do print extra warnings (such as for uninitialized variables). |
94 | -W/-Wextra. */ | |
f7a29665 | 95 | |
e01cc6dc NB |
96 | extern bool extra_warnings; |
97 | ||
078721e1 AC |
98 | /* Nonzero to warn about unused variables, functions et.al. Use |
99 | set_Wunused() to update the -Wunused-* flags that correspond to the | |
eebedaa5 | 100 | -Wunused option. */ |
f7a29665 | 101 | |
6cf9ac28 | 102 | extern void set_Wunused (int setting); |
078721e1 | 103 | |
76817b9d RK |
104 | /* Nonzero means warn about any objects definitions whose size is larger |
105 | than N bytes. Also want about function definitions whose returned | |
106 | values are larger than N bytes. The value N is in `larger_than_size'. */ | |
107 | ||
e01cc6dc | 108 | extern bool warn_larger_than; |
06ceef4e | 109 | extern HOST_WIDE_INT larger_than_size; |
f7a29665 | 110 | |
bf52f899 NS |
111 | /* Nonzero means warn about constructs which might not be strict |
112 | aliasing safe. */ | |
113 | ||
5399d643 | 114 | extern int warn_strict_aliasing; |
bf52f899 | 115 | |
f7a29665 RS |
116 | /* Temporarily suppress certain warnings. |
117 | This is set while reading code from a system header file. */ | |
118 | ||
119 | extern int in_system_header; | |
120 | ||
121 | /* Nonzero for -dp: annotate the assembly with a comment describing the | |
122 | pattern and alternative used. */ | |
123 | ||
124 | extern int flag_print_asm_name; | |
125 | \f | |
126 | /* Now the symbols that are set with `-f' switches. */ | |
127 | ||
128 | /* Nonzero means `char' should be signed. */ | |
129 | ||
130 | extern int flag_signed_char; | |
131 | ||
32770746 PB |
132 | /* Nonzero means give an enum type only as many bytes as it needs. A value |
133 | of 2 means it has not yet been initialized. */ | |
f7a29665 RS |
134 | |
135 | extern int flag_short_enums; | |
136 | ||
f7a29665 RS |
137 | /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */ |
138 | ||
139 | extern int flag_pcc_struct_return; | |
140 | ||
c64f913e CB |
141 | /* 0 means straightforward implementation of complex divide acceptable. |
142 | 1 means wide ranges of inputs must work for complex divide. | |
7e7e470f | 143 | 2 means C99-like requirements for complex multiply and divide. */ |
c64f913e | 144 | |
7e7e470f | 145 | extern int flag_complex_method; |
c64f913e | 146 | |
2cb921f4 AH |
147 | /* Nonzero means that we don't want inlining by virtue of -fno-inline, |
148 | not just because the tree inliner turned us off. */ | |
149 | ||
150 | extern int flag_really_no_inline; | |
151 | ||
f7a29665 RS |
152 | /* Nonzero if we are only using compiler to check syntax errors. */ |
153 | ||
f6db1481 | 154 | extern int rtl_dump_and_exit; |
f7a29665 | 155 | |
d45cf215 | 156 | /* Nonzero means we should save auxiliary info into a .X file. */ |
f7a29665 RS |
157 | |
158 | extern int flag_gen_aux_info; | |
159 | ||
b707b450 R |
160 | /* Nonzero means suppress output of instruction numbers and line number |
161 | notes in debugging dumps. */ | |
162 | ||
163 | extern int flag_dump_unnumbered; | |
164 | ||
f7a29665 RS |
165 | /* Nonzero means change certain warnings into errors. |
166 | Usually these are warnings about failure to conform to some standard. */ | |
167 | ||
168 | extern int flag_pedantic_errors; | |
169 | ||
24a4dd31 JJ |
170 | /* Nonzero if we are compiling code for a shared library, zero for |
171 | executable. */ | |
172 | ||
173 | extern int flag_shlib; | |
174 | ||
32b592fb DE |
175 | /* -dA causes debug information to be produced in |
176 | the generated assembly code (to make it more readable). This option | |
177 | is generally only of use to those who actually need to read the | |
178 | generated assembly code (perhaps while debugging the compiler itself). | |
179 | Currently, this switch is only used by dwarfout.c; however, it is intended | |
180 | to be a catchall for printing debug information in the assembler file. */ | |
181 | ||
182 | extern int flag_debug_asm; | |
183 | ||
43b3a5b1 ZL |
184 | /* Generate code for GNU or NeXT Objective-C runtime environment. */ |
185 | ||
186 | extern int flag_next_runtime; | |
187 | ||
c349e40b SC |
188 | extern int flag_dump_rtl_in_asm; |
189 | ||
673b5311 MM |
190 | /* If one, renumber instruction UIDs to reduce the number of |
191 | unused UIDs if there are a lot of instructions. If greater than | |
192 | one, unconditionally renumber instruction UIDs. */ | |
193 | extern int flag_renumber_insns; | |
f7a29665 RS |
194 | \f |
195 | /* Other basic status info about current function. */ | |
196 | ||
197 | /* Nonzero means current function must be given a frame pointer. | |
198 | Set in stmt.c if anything is allocated on the stack there. | |
199 | Set in reload1.c if anything is allocated on the stack there. */ | |
200 | ||
201 | extern int frame_pointer_needed; | |
202 | ||
c67e6e14 RS |
203 | /* Nonzero if subexpressions must be evaluated from left-to-right. */ |
204 | extern int flag_evaluation_order; | |
205 | ||
bb8ebb7f | 206 | /* Value of the -G xx switch, and whether it was passed or not. */ |
307b599c | 207 | extern unsigned HOST_WIDE_INT g_switch_value; |
d185d268 | 208 | extern bool g_switch_set; |
735a0e33 | 209 | |
efa3896a GK |
210 | /* Values of the -falign-* flags: how much to align labels in code. |
211 | 0 means `use default', 1 means `don't align'. | |
212 | For each variable, there is an _log variant which is the power | |
213 | of two not less than the variable, for .align output. */ | |
214 | ||
efa3896a | 215 | extern int align_loops_log; |
2cca7283 | 216 | extern int align_loops_max_skip; |
efa3896a | 217 | extern int align_jumps_log; |
2cca7283 | 218 | extern int align_jumps_max_skip; |
efa3896a | 219 | extern int align_labels_log; |
2cca7283 | 220 | extern int align_labels_max_skip; |
efa3896a GK |
221 | extern int align_functions_log; |
222 | ||
f963b5d9 RS |
223 | /* Like align_functions_log above, but used by front-ends to force the |
224 | minimum function alignment. Zero means no alignment is forced. */ | |
225 | extern int force_align_functions_log; | |
226 | ||
735a0e33 UD |
227 | /* Nonzero if we dump in VCG format, not plain text. */ |
228 | extern int dump_for_graph; | |
229 | ||
230 | /* Selection of the graph form. */ | |
231 | enum graph_dump_types | |
232 | { | |
233 | no_graph = 0, | |
234 | vcg | |
235 | }; | |
236 | extern enum graph_dump_types graph_dump_format; | |
be163a70 | 237 | |
cc2902df | 238 | /* Nonzero means to collect statistics which might be expensive |
0e5921e8 ZW |
239 | and to print them when we are done. */ |
240 | extern int flag_detailed_statistics; | |
241 | ||
d4d1ebc1 JH |
242 | /* Nonzero means that we defer emitting functions until they are actually |
243 | used. */ | |
244 | extern int flag_remove_unreachable_functions; | |
245 | ||
014a1138 JZ |
246 | /* Nonzero if we should track variables. */ |
247 | extern int flag_var_tracking; | |
248 | ||
6d9901e7 ZD |
249 | /* True if flag_speculative_prefetching was set by user. Used to suppress |
250 | warning message in case flag was set by -fprofile-{generate,use}. */ | |
251 | extern bool flag_speculative_prefetching_set; | |
252 | ||
a37db56b GK |
253 | /* A string that's used when a random name is required. NULL means |
254 | to make it really random. */ | |
255 | ||
256 | extern const char *flag_random_seed; | |
257 | ||
57782ad8 MM |
258 | /* Returns TRUE if generated code should match ABI version N or |
259 | greater is in use. */ | |
260 | ||
261 | #define abi_version_at_least(N) \ | |
262 | (flag_abi_version == 0 || flag_abi_version >= (N)) | |
263 | ||
71925bc0 RS |
264 | /* True if the given mode has a NaN representation and the treatment of |
265 | NaN operands is important. Certain optimizations, such as folding | |
266 | x * 0 into x, are not correct for NaN operands, and are normally | |
267 | disabled for modes with NaNs. The user can ask for them to be | |
268 | done anyway using the -funsafe-math-optimizations switch. */ | |
269 | #define HONOR_NANS(MODE) \ | |
2e8f2e8f | 270 | (MODE_HAS_NANS (MODE) && !flag_finite_math_only) |
71925bc0 | 271 | |
52bfebf0 RS |
272 | /* Like HONOR_NANs, but true if we honor signaling NaNs (or sNaNs). */ |
273 | #define HONOR_SNANS(MODE) (flag_signaling_nans && HONOR_NANS (MODE)) | |
274 | ||
71925bc0 RS |
275 | /* As for HONOR_NANS, but true if the mode can represent infinity and |
276 | the treatment of infinite values is important. */ | |
277 | #define HONOR_INFINITIES(MODE) \ | |
2e8f2e8f | 278 | (MODE_HAS_INFINITIES (MODE) && !flag_finite_math_only) |
71925bc0 RS |
279 | |
280 | /* Like HONOR_NANS, but true if the given mode distinguishes between | |
fbe5a4a6 | 281 | positive and negative zero, and the sign of zero is important. */ |
71925bc0 RS |
282 | #define HONOR_SIGNED_ZEROS(MODE) \ |
283 | (MODE_HAS_SIGNED_ZEROS (MODE) && !flag_unsafe_math_optimizations) | |
284 | ||
285 | /* Like HONOR_NANS, but true if given mode supports sign-dependent rounding, | |
286 | and the rounding mode is important. */ | |
287 | #define HONOR_SIGN_DEPENDENT_ROUNDING(MODE) \ | |
039c3d42 | 288 | (MODE_HAS_SIGN_DEPENDENT_ROUNDING (MODE) && flag_rounding_math) |
71925bc0 | 289 | |
88657302 | 290 | #endif /* ! GCC_FLAGS_H */ |