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f12b58b3 | 1 | /* Compilation switch flag definitions for GCC. |
bc233f0c | 2 | Copyright (C) 1987, 1988, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002, |
43d2dc74 | 3 | 2003, 2004, 2005 |
b278476e | 4 | Free Software Foundation, Inc. |
addd8f36 | 5 | |
f12b58b3 | 6 | This file is part of GCC. |
addd8f36 | 7 | |
f12b58b3 | 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. | |
addd8f36 | 12 | |
f12b58b3 | 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. | |
addd8f36 | 17 | |
18 | You should have received a copy of the GNU General Public License | |
f12b58b3 | 19 | along with GCC; see the file COPYING. If not, write to the Free |
67ce556b | 20 | Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA |
21 | 02110-1301, USA. */ | |
addd8f36 | 22 | |
518796ad | 23 | #ifndef GCC_FLAGS_H |
24 | #define GCC_FLAGS_H | |
25 | ||
2e9da478 | 26 | #include "options.h" |
27 | ||
addd8f36 | 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). */ | |
be6eb971 | 33 | DWARF2_DEBUG, /* Write Dwarf v2 debug info (using dwarf2out.c). */ |
8d60d2bc | 34 | XCOFF_DEBUG, /* Write IBM/Xcoff debug info (using dbxout.c). */ |
00e0eb3d | 35 | VMS_DEBUG, /* Write VMS debug info (using vmsdbgout.c). */ |
8d60d2bc | 36 | VMS_AND_DWARF2_DEBUG /* Write VMS debug info (using vmsdbgout.c). |
00e0eb3d | 37 | and DWARF v2 debug info (using dwarf2out.c). */ |
addd8f36 | 38 | }; |
39 | ||
40 | /* Specify which kind of debugging info to generate. */ | |
41 | extern enum debug_info_type write_symbols; | |
42 | ||
cc4ca723 | 43 | /* Names of debug_info_type, for error messages. */ |
44 | extern const char *const debug_type_names[]; | |
45 | ||
addd8f36 | 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. */ | |
a7dce381 | 50 | DINFO_LEVEL_NORMAL, /* Write info for all declarations (and line table). */ |
addd8f36 | 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 | ||
51d7935f | 57 | /* Nonzero means use GNU-only extensions in the generated symbolic |
58 | debugging information. */ | |
b0e56fb1 | 59 | extern bool use_gnu_debug_info_extensions; |
addd8f36 | 60 | |
b212f378 | 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 | ||
addd8f36 | 85 | /* Nonzero means do optimizations. -opt. */ |
86 | ||
87 | extern int optimize; | |
88 | ||
57361983 | 89 | /* Nonzero means optimize for size. -Os. */ |
90 | ||
91 | extern int optimize_size; | |
92 | ||
56421f52 | 93 | /* Do print extra warnings (such as for uninitialized variables). |
94 | -W/-Wextra. */ | |
addd8f36 | 95 | |
6f2f567f | 96 | extern bool extra_warnings; |
97 | ||
6dfd0eba | 98 | /* Nonzero to warn about unused variables, functions et.al. Use |
99 | set_Wunused() to update the -Wunused-* flags that correspond to the | |
a7dce381 | 100 | -Wunused option. */ |
addd8f36 | 101 | |
8a82c3cf | 102 | extern void set_Wunused (int setting); |
6dfd0eba | 103 | |
75db8365 | 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 | ||
6f2f567f | 108 | extern bool warn_larger_than; |
b278476e | 109 | extern HOST_WIDE_INT larger_than_size; |
addd8f36 | 110 | |
812f3fa9 | 111 | /* Nonzero means warn about constructs which might not be strict |
112 | aliasing safe. */ | |
113 | ||
c1628b55 | 114 | extern int warn_strict_aliasing; |
812f3fa9 | 115 | |
addd8f36 | 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 | ||
5bf3fee3 | 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. */ | |
addd8f36 | 134 | |
135 | extern int flag_short_enums; | |
136 | ||
addd8f36 | 137 | /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */ |
138 | ||
139 | extern int flag_pcc_struct_return; | |
140 | ||
27bc6aee | 141 | /* 0 means straightforward implementation of complex divide acceptable. |
142 | 1 means wide ranges of inputs must work for complex divide. | |
0dfc45b5 | 143 | 2 means C99-like requirements for complex multiply and divide. */ |
27bc6aee | 144 | |
0dfc45b5 | 145 | extern int flag_complex_method; |
27bc6aee | 146 | |
c31da6e7 | 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 | ||
addd8f36 | 152 | /* Nonzero if we are only using compiler to check syntax errors. */ |
153 | ||
a49a878f | 154 | extern int rtl_dump_and_exit; |
addd8f36 | 155 | |
f9e15121 | 156 | /* Nonzero means we should save auxiliary info into a .X file. */ |
addd8f36 | 157 | |
158 | extern int flag_gen_aux_info; | |
159 | ||
fd63ca43 | 160 | /* Nonzero means suppress output of instruction numbers and line number |
161 | notes in debugging dumps. */ | |
162 | ||
163 | extern int flag_dump_unnumbered; | |
164 | ||
addd8f36 | 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 | ||
c3ce66b0 | 170 | /* Nonzero if we are compiling code for a shared library, zero for |
171 | executable. */ | |
172 | ||
173 | extern int flag_shlib; | |
174 | ||
4f96aab5 | 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 | ||
af5e5fd0 | 184 | extern int flag_dump_rtl_in_asm; |
185 | ||
214d02d0 | 186 | /* If one, renumber instruction UIDs to reduce the number of |
187 | unused UIDs if there are a lot of instructions. If greater than | |
188 | one, unconditionally renumber instruction UIDs. */ | |
189 | extern int flag_renumber_insns; | |
addd8f36 | 190 | \f |
191 | /* Other basic status info about current function. */ | |
192 | ||
193 | /* Nonzero means current function must be given a frame pointer. | |
194 | Set in stmt.c if anything is allocated on the stack there. | |
195 | Set in reload1.c if anything is allocated on the stack there. */ | |
196 | ||
197 | extern int frame_pointer_needed; | |
198 | ||
3541e113 | 199 | /* Nonzero if subexpressions must be evaluated from left-to-right. */ |
200 | extern int flag_evaluation_order; | |
201 | ||
a9fa9190 | 202 | /* Value of the -G xx switch, and whether it was passed or not. */ |
3be2f219 | 203 | extern unsigned HOST_WIDE_INT g_switch_value; |
e690b385 | 204 | extern bool g_switch_set; |
3eaf50a4 | 205 | |
61e95947 | 206 | /* Values of the -falign-* flags: how much to align labels in code. |
207 | 0 means `use default', 1 means `don't align'. | |
208 | For each variable, there is an _log variant which is the power | |
209 | of two not less than the variable, for .align output. */ | |
210 | ||
61e95947 | 211 | extern int align_loops_log; |
93429286 | 212 | extern int align_loops_max_skip; |
61e95947 | 213 | extern int align_jumps_log; |
93429286 | 214 | extern int align_jumps_max_skip; |
61e95947 | 215 | extern int align_labels_log; |
93429286 | 216 | extern int align_labels_max_skip; |
61e95947 | 217 | extern int align_functions_log; |
218 | ||
fc5cb4c0 | 219 | /* Like align_functions_log above, but used by front-ends to force the |
220 | minimum function alignment. Zero means no alignment is forced. */ | |
221 | extern int force_align_functions_log; | |
222 | ||
3eaf50a4 | 223 | /* Nonzero if we dump in VCG format, not plain text. */ |
224 | extern int dump_for_graph; | |
225 | ||
226 | /* Selection of the graph form. */ | |
227 | enum graph_dump_types | |
228 | { | |
229 | no_graph = 0, | |
230 | vcg | |
231 | }; | |
232 | extern enum graph_dump_types graph_dump_format; | |
5bbb9f06 | 233 | |
6ef828f9 | 234 | /* Nonzero means to collect statistics which might be expensive |
518796ad | 235 | and to print them when we are done. */ |
236 | extern int flag_detailed_statistics; | |
237 | ||
19489abd | 238 | /* Nonzero means that we defer emitting functions until they are actually |
239 | used. */ | |
240 | extern int flag_remove_unreachable_functions; | |
241 | ||
5923a5e7 | 242 | /* Nonzero if we should track variables. */ |
243 | extern int flag_var_tracking; | |
244 | ||
8a5df2ce | 245 | /* True if flag_speculative_prefetching was set by user. Used to suppress |
246 | warning message in case flag was set by -fprofile-{generate,use}. */ | |
247 | extern bool flag_speculative_prefetching_set; | |
248 | ||
eb54bdbd | 249 | /* A string that's used when a random name is required. NULL means |
250 | to make it really random. */ | |
251 | ||
252 | extern const char *flag_random_seed; | |
253 | ||
e100aadc | 254 | /* Returns TRUE if generated code should match ABI version N or |
255 | greater is in use. */ | |
256 | ||
257 | #define abi_version_at_least(N) \ | |
258 | (flag_abi_version == 0 || flag_abi_version >= (N)) | |
259 | ||
920d0fb5 | 260 | /* True if the given mode has a NaN representation and the treatment of |
261 | NaN operands is important. Certain optimizations, such as folding | |
262 | x * 0 into x, are not correct for NaN operands, and are normally | |
263 | disabled for modes with NaNs. The user can ask for them to be | |
264 | done anyway using the -funsafe-math-optimizations switch. */ | |
265 | #define HONOR_NANS(MODE) \ | |
7eece8c3 | 266 | (MODE_HAS_NANS (MODE) && !flag_finite_math_only) |
920d0fb5 | 267 | |
0a8176f3 | 268 | /* Like HONOR_NANs, but true if we honor signaling NaNs (or sNaNs). */ |
269 | #define HONOR_SNANS(MODE) (flag_signaling_nans && HONOR_NANS (MODE)) | |
270 | ||
920d0fb5 | 271 | /* As for HONOR_NANS, but true if the mode can represent infinity and |
272 | the treatment of infinite values is important. */ | |
273 | #define HONOR_INFINITIES(MODE) \ | |
7eece8c3 | 274 | (MODE_HAS_INFINITIES (MODE) && !flag_finite_math_only) |
920d0fb5 | 275 | |
276 | /* Like HONOR_NANS, but true if the given mode distinguishes between | |
98667efb | 277 | positive and negative zero, and the sign of zero is important. */ |
920d0fb5 | 278 | #define HONOR_SIGNED_ZEROS(MODE) \ |
279 | (MODE_HAS_SIGNED_ZEROS (MODE) && !flag_unsafe_math_optimizations) | |
280 | ||
281 | /* Like HONOR_NANS, but true if given mode supports sign-dependent rounding, | |
282 | and the rounding mode is important. */ | |
283 | #define HONOR_SIGN_DEPENDENT_ROUNDING(MODE) \ | |
5466f589 | 284 | (MODE_HAS_SIGN_DEPENDENT_ROUNDING (MODE) && flag_rounding_math) |
920d0fb5 | 285 | |
2a281353 | 286 | #endif /* ! GCC_FLAGS_H */ |