Line data Source code
1 : /* Define builtin-in macros for all front ends that perform preprocessing
2 : Copyright (C) 2010-2026 Free Software Foundation, Inc.
3 :
4 : This file is part of GCC.
5 :
6 : GCC is free software; you can redistribute it and/or modify it under
7 : the terms of the GNU General Public License as published by the Free
8 : Software Foundation; either version 3, or (at your option) any later
9 : version.
10 :
11 : GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 : WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 : FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 : for more details.
15 :
16 : You should have received a copy of the GNU General Public License
17 : along with GCC; see the file COPYING3. If not see
18 : <http://www.gnu.org/licenses/>. */
19 :
20 : #include "config.h"
21 : #include "system.h"
22 : #include "coretypes.h"
23 : #include "memmodel.h"
24 : #include "target.h"
25 : #include "tree.h"
26 : #include "version.h"
27 : #include "flags.h"
28 : #include "cpplib.h"
29 : #include "cppbuiltin.h"
30 :
31 :
32 : /* Parse a BASEVER version string of the format "major.minor.patchlevel"
33 : or "major.minor" to extract its components. */
34 : void
35 306063 : parse_basever (int *major, int *minor, int *patchlevel)
36 : {
37 306063 : static int s_major = -1, s_minor, s_patchlevel;
38 :
39 306063 : if (s_major == -1)
40 208793 : if (sscanf (BASEVER, "%d.%d.%d", &s_major, &s_minor, &s_patchlevel) != 3)
41 : {
42 0 : sscanf (BASEVER, "%d.%d", &s_major, &s_minor);
43 0 : s_patchlevel = 0;
44 : }
45 :
46 306063 : if (major)
47 306063 : *major = s_major;
48 :
49 306063 : if (minor)
50 208835 : *minor = s_minor;
51 :
52 306063 : if (patchlevel)
53 208835 : *patchlevel = s_patchlevel;
54 306063 : }
55 :
56 :
57 : /* Define __GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__ and __VERSION__. */
58 : static void
59 208790 : define__GNUC__ (cpp_reader *pfile)
60 : {
61 208790 : int major, minor, patchlevel;
62 :
63 208790 : parse_basever (&major, &minor, &patchlevel);
64 208790 : cpp_define_formatted (pfile, "__GNUC__=%d", major);
65 208790 : cpp_define_formatted (pfile, "__GNUC_MINOR__=%d", minor);
66 208790 : cpp_define_formatted (pfile, "__GNUC_PATCHLEVEL__=%d", patchlevel);
67 208790 : cpp_define_formatted (pfile, "__VERSION__=\"%s\"", version_string);
68 208790 : cpp_define_formatted (pfile, "__ATOMIC_RELAXED=%d", MEMMODEL_RELAXED);
69 208790 : cpp_define_formatted (pfile, "__ATOMIC_SEQ_CST=%d", MEMMODEL_SEQ_CST);
70 208790 : cpp_define_formatted (pfile, "__ATOMIC_ACQUIRE=%d", MEMMODEL_ACQUIRE);
71 208790 : cpp_define_formatted (pfile, "__ATOMIC_RELEASE=%d", MEMMODEL_RELEASE);
72 208790 : cpp_define_formatted (pfile, "__ATOMIC_ACQ_REL=%d", MEMMODEL_ACQ_REL);
73 208790 : cpp_define_formatted (pfile, "__ATOMIC_CONSUME=%d", MEMMODEL_CONSUME);
74 208790 : }
75 :
76 :
77 : /* Define various built-in CPP macros that depend on language-independent
78 : compilation flags. */
79 : static void
80 208790 : define_builtin_macros_for_compilation_flags (cpp_reader *pfile)
81 : {
82 208790 : if (flag_pic)
83 : {
84 6792 : cpp_define_formatted (pfile, "__pic__=%d", flag_pic);
85 6792 : cpp_define_formatted (pfile, "__PIC__=%d", flag_pic);
86 : }
87 208790 : if (flag_pie)
88 : {
89 261 : cpp_define_formatted (pfile, "__pie__=%d", flag_pie);
90 261 : cpp_define_formatted (pfile, "__PIE__=%d", flag_pie);
91 : }
92 :
93 208790 : if (flag_sanitize & SANITIZE_ADDRESS)
94 2336 : cpp_define (pfile, "__SANITIZE_ADDRESS__");
95 :
96 208790 : if (flag_sanitize & SANITIZE_HWADDRESS)
97 260 : cpp_define (pfile, "__SANITIZE_HWADDRESS__");
98 :
99 208790 : if (flag_sanitize & SANITIZE_THREAD)
100 257 : cpp_define (pfile, "__SANITIZE_THREAD__");
101 :
102 208790 : if (optimize_size)
103 9305 : cpp_define (pfile, "__OPTIMIZE_SIZE__");
104 208790 : if (optimize)
105 115114 : cpp_define (pfile, "__OPTIMIZE__");
106 :
107 208790 : if (fast_math_flags_set_p (&global_options))
108 1482 : cpp_define (pfile, "__FAST_MATH__");
109 208790 : if (flag_signaling_nans)
110 309 : cpp_define (pfile, "__SUPPORT_SNAN__");
111 208790 : if (!flag_errno_math)
112 2720 : cpp_define (pfile, "__NO_MATH_ERRNO__");
113 208790 : if (flag_reciprocal_math)
114 1552 : cpp_define (pfile, "__RECIPROCAL_MATH__");
115 208790 : if (!flag_signed_zeros)
116 1569 : cpp_define (pfile, "__NO_SIGNED_ZEROS__");
117 208790 : if (!flag_trapping_math)
118 1658 : cpp_define (pfile, "__NO_TRAPPING_MATH__");
119 208790 : if (flag_associative_math)
120 1522 : cpp_define (pfile, "__ASSOCIATIVE_MATH__");
121 208790 : if (flag_rounding_math)
122 193 : cpp_define (pfile, "__ROUNDING_MATH__");
123 :
124 208790 : cpp_define_formatted (pfile, "__FINITE_MATH_ONLY__=%d",
125 : flag_finite_math_only);
126 208790 : }
127 :
128 :
129 : /* Define built-in macros for LP64 targets. */
130 : static void
131 208790 : define_builtin_macros_for_lp64 (cpp_reader *pfile)
132 : {
133 208790 : if (TYPE_PRECISION (long_integer_type_node) == 64
134 202973 : && POINTER_SIZE == 64
135 411763 : && TYPE_PRECISION (integer_type_node) == 32)
136 : {
137 202973 : cpp_define (pfile, "_LP64");
138 202973 : cpp_define (pfile, "__LP64__");
139 : }
140 208790 : }
141 :
142 :
143 : /* Define macros for size of basic C types. */
144 : static void
145 208790 : define_builtin_macros_for_type_sizes (cpp_reader *pfile)
146 : {
147 : #define define_type_sizeof(NAME, TYPE) \
148 : cpp_define_formatted (pfile, NAME"=" HOST_WIDE_INT_PRINT_DEC, \
149 : tree_to_uhwi (TYPE_SIZE_UNIT (TYPE)))
150 :
151 208790 : define_type_sizeof ("__SIZEOF_INT__", integer_type_node);
152 208790 : define_type_sizeof ("__SIZEOF_LONG__", long_integer_type_node);
153 208790 : define_type_sizeof ("__SIZEOF_LONG_LONG__", long_long_integer_type_node);
154 208790 : define_type_sizeof ("__SIZEOF_SHORT__", short_integer_type_node);
155 208790 : define_type_sizeof ("__SIZEOF_FLOAT__", float_type_node);
156 208790 : define_type_sizeof ("__SIZEOF_DOUBLE__", double_type_node);
157 208790 : define_type_sizeof ("__SIZEOF_LONG_DOUBLE__", long_double_type_node);
158 208790 : define_type_sizeof ("__SIZEOF_SIZE_T__", size_type_node);
159 :
160 : #undef define_type_sizeof
161 :
162 417580 : cpp_define_formatted (pfile, "__CHAR_BIT__=%u",
163 208790 : TYPE_PRECISION (char_type_node));
164 208790 : cpp_define_formatted (pfile, "__BIGGEST_ALIGNMENT__=%d",
165 208790 : BIGGEST_ALIGNMENT / BITS_PER_UNIT);
166 :
167 : /* Define constants useful for implementing endian.h. */
168 208790 : cpp_define (pfile, "__ORDER_LITTLE_ENDIAN__=1234");
169 208790 : cpp_define (pfile, "__ORDER_BIG_ENDIAN__=4321");
170 208790 : cpp_define (pfile, "__ORDER_PDP_ENDIAN__=3412");
171 :
172 208790 : if (WORDS_BIG_ENDIAN == BYTES_BIG_ENDIAN)
173 208790 : cpp_define_formatted (pfile, "__BYTE_ORDER__=%s",
174 : (WORDS_BIG_ENDIAN
175 : ? "__ORDER_BIG_ENDIAN__"
176 : : "__ORDER_LITTLE_ENDIAN__"));
177 : else
178 : {
179 : /* Assert that we're only dealing with the PDP11 case. */
180 : gcc_assert (!BYTES_BIG_ENDIAN);
181 : gcc_assert (WORDS_BIG_ENDIAN);
182 :
183 : cpp_define (pfile, "__BYTE_ORDER__=__ORDER_PDP_ENDIAN__");
184 : }
185 :
186 417580 : cpp_define_formatted (pfile, "__FLOAT_WORD_ORDER__=%s",
187 208790 : (targetm.float_words_big_endian ()
188 : ? "__ORDER_BIG_ENDIAN__"
189 : : "__ORDER_LITTLE_ENDIAN__"));
190 :
191 : /* ptr_type_node can't be used here since ptr_mode is only set when
192 : toplev calls backend_init which is not done with -E switch. */
193 208790 : cpp_define_formatted (pfile, "__SIZEOF_POINTER__=%d",
194 208790 : 1 << ceil_log2 ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT));
195 208790 : }
196 :
197 :
198 : /* Define macros builtins common to all language performing CPP
199 : preprocessing. */
200 : void
201 208790 : define_language_independent_builtin_macros (cpp_reader *pfile)
202 : {
203 208790 : define__GNUC__ (pfile);
204 208790 : define_builtin_macros_for_compilation_flags (pfile);
205 208790 : define_builtin_macros_for_lp64 (pfile);
206 208790 : define_builtin_macros_for_type_sizes (pfile);
207 208790 : }
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