1 /* Define builtin-in macros for all front ends that perform preprocessing
2 Copyright (C) 2010-2014 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 "tm.h"
24 #include "tree.h"
25 #include "version.h"
26 #include "flags.h"
27 #include "cpp-id-data.h"
28 #include "cppbuiltin.h"
29 #include "target.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
parse_basever(int * major,int * minor,int * patchlevel)35 parse_basever (int *major, int *minor, int *patchlevel)
36 {
37 static int s_major = -1, s_minor, s_patchlevel;
38
39 if (s_major == -1)
40 if (sscanf (BASEVER, "%d.%d.%d", &s_major, &s_minor, &s_patchlevel) != 3)
41 {
42 sscanf (BASEVER, "%d.%d", &s_major, &s_minor);
43 s_patchlevel = 0;
44 }
45
46 if (major)
47 *major = s_major;
48
49 if (minor)
50 *minor = s_minor;
51
52 if (patchlevel)
53 *patchlevel = s_patchlevel;
54 }
55
56
57 /* Define __GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__ and __VERSION__. */
58 static void
define__GNUC__(cpp_reader * pfile)59 define__GNUC__ (cpp_reader *pfile)
60 {
61 int major, minor, patchlevel;
62
63 parse_basever (&major, &minor, &patchlevel);
64 cpp_define_formatted (pfile, "__GNUC__=%d", major);
65 cpp_define_formatted (pfile, "__GNUC_MINOR__=%d", minor);
66 cpp_define_formatted (pfile, "__GNUC_PATCHLEVEL__=%d", patchlevel);
67 cpp_define_formatted (pfile, "__VERSION__=\"%s\"", version_string);
68 cpp_define_formatted (pfile, "__ATOMIC_RELAXED=%d", MEMMODEL_RELAXED);
69 cpp_define_formatted (pfile, "__ATOMIC_SEQ_CST=%d", MEMMODEL_SEQ_CST);
70 cpp_define_formatted (pfile, "__ATOMIC_ACQUIRE=%d", MEMMODEL_ACQUIRE);
71 cpp_define_formatted (pfile, "__ATOMIC_RELEASE=%d", MEMMODEL_RELEASE);
72 cpp_define_formatted (pfile, "__ATOMIC_ACQ_REL=%d", MEMMODEL_ACQ_REL);
73 cpp_define_formatted (pfile, "__ATOMIC_CONSUME=%d", MEMMODEL_CONSUME);
74 }
75
76
77 /* Define various built-in CPP macros that depend on language-independent
78 compilation flags. */
79 static void
define_builtin_macros_for_compilation_flags(cpp_reader * pfile)80 define_builtin_macros_for_compilation_flags (cpp_reader *pfile)
81 {
82 if (flag_pic)
83 {
84 cpp_define_formatted (pfile, "__pic__=%d", flag_pic);
85 cpp_define_formatted (pfile, "__PIC__=%d", flag_pic);
86 }
87 if (flag_pie)
88 {
89 cpp_define_formatted (pfile, "__pie__=%d", flag_pie);
90 cpp_define_formatted (pfile, "__PIE__=%d", flag_pie);
91 }
92
93 if (flag_sanitize & SANITIZE_ADDRESS)
94 cpp_define (pfile, "__SANITIZE_ADDRESS__");
95
96 if (optimize_size)
97 cpp_define (pfile, "__OPTIMIZE_SIZE__");
98 if (optimize)
99 cpp_define (pfile, "__OPTIMIZE__");
100
101 if (fast_math_flags_set_p (&global_options))
102 cpp_define (pfile, "__FAST_MATH__");
103 if (flag_signaling_nans)
104 cpp_define (pfile, "__SUPPORT_SNAN__");
105
106 cpp_define_formatted (pfile, "__FINITE_MATH_ONLY__=%d",
107 flag_finite_math_only);
108 if (flag_cilkplus)
109 cpp_define (pfile, "__cilk=200");
110 }
111
112
113 /* Define built-in macros for LP64 targets. */
114 static void
define_builtin_macros_for_lp64(cpp_reader * pfile)115 define_builtin_macros_for_lp64 (cpp_reader *pfile)
116 {
117 if (TYPE_PRECISION (long_integer_type_node) == 64
118 && POINTER_SIZE == 64
119 && TYPE_PRECISION (integer_type_node) == 32)
120 {
121 cpp_define (pfile, "_LP64");
122 cpp_define (pfile, "__LP64__");
123 }
124 }
125
126
127 /* Define macros for size of basic C types. */
128 static void
define_builtin_macros_for_type_sizes(cpp_reader * pfile)129 define_builtin_macros_for_type_sizes (cpp_reader *pfile)
130 {
131 #define define_type_sizeof(NAME, TYPE) \
132 cpp_define_formatted (pfile, NAME "=" HOST_WIDE_INT_PRINT_DEC, \
133 tree_to_uhwi (TYPE_SIZE_UNIT (TYPE)))
134
135 define_type_sizeof ("__SIZEOF_INT__", integer_type_node);
136 define_type_sizeof ("__SIZEOF_LONG__", long_integer_type_node);
137 define_type_sizeof ("__SIZEOF_LONG_LONG__", long_long_integer_type_node);
138 define_type_sizeof ("__SIZEOF_SHORT__", short_integer_type_node);
139 define_type_sizeof ("__SIZEOF_FLOAT__", float_type_node);
140 define_type_sizeof ("__SIZEOF_DOUBLE__", double_type_node);
141 define_type_sizeof ("__SIZEOF_LONG_DOUBLE__", long_double_type_node);
142 define_type_sizeof ("__SIZEOF_SIZE_T__", size_type_node);
143
144 #undef define_type_sizeof
145
146 cpp_define_formatted (pfile, "__CHAR_BIT__=%u",
147 TYPE_PRECISION (char_type_node));
148 cpp_define_formatted (pfile, "__BIGGEST_ALIGNMENT__=%d",
149 BIGGEST_ALIGNMENT / BITS_PER_UNIT);
150
151 /* Define constants useful for implementing endian.h. */
152 cpp_define (pfile, "__ORDER_LITTLE_ENDIAN__=1234");
153 cpp_define (pfile, "__ORDER_BIG_ENDIAN__=4321");
154 cpp_define (pfile, "__ORDER_PDP_ENDIAN__=3412");
155
156 if (WORDS_BIG_ENDIAN == BYTES_BIG_ENDIAN)
157 cpp_define_formatted (pfile, "__BYTE_ORDER__=%s",
158 (WORDS_BIG_ENDIAN
159 ? "__ORDER_BIG_ENDIAN__"
160 : "__ORDER_LITTLE_ENDIAN__"));
161 else
162 {
163 /* Assert that we're only dealing with the PDP11 case. */
164 gcc_assert (!BYTES_BIG_ENDIAN);
165 gcc_assert (WORDS_BIG_ENDIAN);
166
167 cpp_define (pfile, "__BYTE_ORDER__=__ORDER_PDP_ENDIAN__");
168 }
169
170 cpp_define_formatted (pfile, "__FLOAT_WORD_ORDER__=%s",
171 (targetm.float_words_big_endian ()
172 ? "__ORDER_BIG_ENDIAN__"
173 : "__ORDER_LITTLE_ENDIAN__"));
174
175 /* ptr_type_node can't be used here since ptr_mode is only set when
176 toplev calls backend_init which is not done with -E switch. */
177 cpp_define_formatted (pfile, "__SIZEOF_POINTER__=%d",
178 POINTER_SIZE / BITS_PER_UNIT);
179 }
180
181
182 /* Define macros builtins common to all language performing CPP
183 preprocessing. */
184 void
define_language_independent_builtin_macros(cpp_reader * pfile)185 define_language_independent_builtin_macros (cpp_reader *pfile)
186 {
187 define__GNUC__ (pfile);
188 define_builtin_macros_for_compilation_flags (pfile);
189 define_builtin_macros_for_lp64 (pfile);
190 define_builtin_macros_for_type_sizes (pfile);
191 }
192