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82a1c2fe FXC |
1 | /* Define builtin-in macros for all front ends that perform preprocessing |
2 | Copyright (C) 2010 | |
3 | Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GCC. | |
6 | ||
7 | GCC is free software; you can redistribute it and/or modify it under | |
8 | the terms of the GNU General Public License as published by the Free | |
9 | Software Foundation; either version 3, or (at your option) any later | |
10 | version. | |
11 | ||
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GCC; see the file COPYING3. If not see | |
19 | <http://www.gnu.org/licenses/>. */ | |
20 | ||
21 | #include "config.h" | |
22 | #include "system.h" | |
23 | #include "coretypes.h" | |
24 | #include "tm.h" | |
25 | #include "tree.h" | |
26 | #include "version.h" | |
27 | #include "flags.h" | |
28 | #include "toplev.h" | |
29 | #include "cpp-id-data.h" | |
30 | #include "cppbuiltin.h" | |
31 | ||
32 | ||
33 | /* Parse a BASEVER version string of the format "major.minor.patchlevel" | |
34 | or "major.minor" to extract its components. */ | |
35 | void | |
36 | parse_basever (int *major, int *minor, int *patchlevel) | |
37 | { | |
38 | static int s_major = -1, s_minor, s_patchlevel; | |
39 | ||
40 | if (s_major == -1) | |
41 | if (sscanf (BASEVER, "%d.%d.%d", &s_major, &s_minor, &s_patchlevel) != 3) | |
42 | { | |
43 | sscanf (BASEVER, "%d.%d", &s_major, &s_minor); | |
44 | s_patchlevel = 0; | |
45 | } | |
46 | ||
47 | if (major) | |
48 | *major = s_major; | |
49 | ||
50 | if (minor) | |
51 | *minor = s_minor; | |
52 | ||
53 | if (patchlevel) | |
54 | *patchlevel = s_patchlevel; | |
55 | } | |
56 | ||
57 | ||
58 | /* Define __GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__ and __VERSION__. */ | |
59 | static void | |
60 | define__GNUC__ (cpp_reader *pfile) | |
61 | { | |
62 | int major, minor, patchlevel; | |
63 | ||
64 | parse_basever (&major, &minor, &patchlevel); | |
65 | cpp_define_formatted (pfile, "__GNUC__=%d", major); | |
66 | cpp_define_formatted (pfile, "__GNUC_MINOR__=%d", minor); | |
67 | cpp_define_formatted (pfile, "__GNUC_PATCHLEVEL__=%d", patchlevel); | |
68 | cpp_define_formatted (pfile, "__VERSION__=\"%s\"", version_string); | |
69 | } | |
70 | ||
71 | ||
72 | /* Define various built-in CPP macros that depend on language-independent | |
73 | compilation flags. */ | |
74 | static void | |
75 | define_builtin_macros_for_compilation_flags (cpp_reader *pfile) | |
76 | { | |
77 | if (flag_pic) | |
78 | { | |
79 | cpp_define_formatted (pfile, "__pic__=%d", flag_pic); | |
80 | cpp_define_formatted (pfile, "__PIC__=%d", flag_pic); | |
81 | } | |
82 | if (flag_pie) | |
83 | { | |
84 | cpp_define_formatted (pfile, "__pie__=%d", flag_pie); | |
85 | cpp_define_formatted (pfile, "__PIE__=%d", flag_pie); | |
86 | } | |
87 | ||
88 | if (optimize_size) | |
89 | cpp_define (pfile, "__OPTIMIZE_SIZE__"); | |
90 | if (optimize) | |
91 | cpp_define (pfile, "__OPTIMIZE__"); | |
92 | ||
0576d21f | 93 | if (fast_math_flags_set_p (&global_options)) |
82a1c2fe FXC |
94 | cpp_define (pfile, "__FAST_MATH__"); |
95 | if (flag_signaling_nans) | |
96 | cpp_define (pfile, "__SUPPORT_SNAN__"); | |
97 | ||
98 | cpp_define_formatted (pfile, "__FINITE_MATH_ONLY__=%d", | |
99 | flag_finite_math_only); | |
100 | } | |
101 | ||
102 | ||
103 | /* Define built-in macros for LP64 targets. */ | |
104 | static void | |
105 | define_builtin_macros_for_lp64 (cpp_reader *pfile) | |
106 | { | |
107 | if (TYPE_PRECISION (long_integer_type_node) == 64 | |
108 | && POINTER_SIZE == 64 | |
109 | && TYPE_PRECISION (integer_type_node) == 32) | |
110 | { | |
111 | cpp_define (pfile, "_LP64"); | |
112 | cpp_define (pfile, "__LP64__"); | |
113 | } | |
114 | } | |
115 | ||
116 | ||
117 | /* Define macros for size of basic C types. */ | |
118 | static void | |
119 | define_builtin_macros_for_type_sizes (cpp_reader *pfile) | |
120 | { | |
121 | #define define_type_sizeof(NAME, TYPE) \ | |
122 | cpp_define_formatted (pfile, NAME"="HOST_WIDE_INT_PRINT_DEC, \ | |
123 | tree_low_cst (TYPE_SIZE_UNIT (TYPE), 1)) | |
124 | ||
125 | define_type_sizeof ("__SIZEOF_INT__", integer_type_node); | |
126 | define_type_sizeof ("__SIZEOF_LONG__", long_integer_type_node); | |
127 | define_type_sizeof ("__SIZEOF_LONG_LONG__", long_long_integer_type_node); | |
128 | define_type_sizeof ("__SIZEOF_SHORT__", short_integer_type_node); | |
129 | define_type_sizeof ("__SIZEOF_FLOAT__", float_type_node); | |
130 | define_type_sizeof ("__SIZEOF_DOUBLE__", double_type_node); | |
131 | define_type_sizeof ("__SIZEOF_LONG_DOUBLE__", long_double_type_node); | |
132 | define_type_sizeof ("__SIZEOF_SIZE_T__", size_type_node); | |
133 | ||
134 | #undef define_type_sizeof | |
135 | ||
136 | cpp_define_formatted (pfile, "__CHAR_BIT__=%u", | |
137 | TYPE_PRECISION (char_type_node)); | |
138 | cpp_define_formatted (pfile, "__BIGGEST_ALIGNMENT__=%d", | |
139 | BIGGEST_ALIGNMENT / BITS_PER_UNIT); | |
140 | ||
18ed6ee4 NF |
141 | /* Define constants useful for implementing endian.h. */ |
142 | cpp_define (pfile, "__ORDER_LITTLE_ENDIAN__=1234"); | |
143 | cpp_define (pfile, "__ORDER_BIG_ENDIAN__=4321"); | |
144 | cpp_define (pfile, "__ORDER_PDP_ENDIAN__=3412"); | |
145 | ||
146 | if (WORDS_BIG_ENDIAN == BYTES_BIG_ENDIAN) | |
147 | cpp_define_formatted (pfile, "__BYTE_ORDER__=%s", | |
148 | (WORDS_BIG_ENDIAN | |
149 | ? "__ORDER_BIG_ENDIAN__" | |
150 | : "__ORDER_LITTLE_ENDIAN__")); | |
151 | else | |
152 | { | |
153 | /* Assert that we're only dealing with the PDP11 case. */ | |
17f84643 JR |
154 | gcc_assert (!BYTES_BIG_ENDIAN); |
155 | gcc_assert (WORDS_BIG_ENDIAN); | |
18ed6ee4 NF |
156 | |
157 | cpp_define (pfile, "__BYTE_ORDER__=__ORDER_PDP_ENDIAN__"); | |
158 | } | |
159 | ||
a3abe41c NF |
160 | cpp_define_formatted (pfile, "__FLOAT_WORD_ORDER__=%s", |
161 | (FLOAT_WORDS_BIG_ENDIAN | |
162 | ? "__ORDER_BIG_ENDIAN__" | |
163 | : "__ORDER_LITTLE_ENDIAN__")); | |
164 | ||
82a1c2fe FXC |
165 | /* ptr_type_node can't be used here since ptr_mode is only set when |
166 | toplev calls backend_init which is not done with -E switch. */ | |
167 | cpp_define_formatted (pfile, "__SIZEOF_POINTER__=%d", | |
168 | POINTER_SIZE / BITS_PER_UNIT); | |
169 | } | |
170 | ||
171 | ||
172 | /* Define macros builtins common to all language performing CPP | |
173 | preprocessing. */ | |
174 | void | |
175 | define_language_independent_builtin_macros (cpp_reader *pfile) | |
176 | { | |
177 | define__GNUC__ (pfile); | |
178 | define_builtin_macros_for_compilation_flags (pfile); | |
179 | define_builtin_macros_for_lp64 (pfile); | |
180 | define_builtin_macros_for_type_sizes (pfile); | |
181 | } |