2011-04-27 Tobias Burnus <burnus@net-b.de>
[official-gcc.git] / gcc / cppbuiltin.c
blobcf7d2ff12fd13335a920cf59f465db021436033a
1 /* Define builtin-in macros for all front ends that perform preprocessing
2 Copyright (C) 2010
3 Free Software Foundation, Inc.
5 This file is part of GCC.
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.
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.
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/>. */
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 "cpp-id-data.h"
29 #include "cppbuiltin.h"
30 #include "target.h"
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)
38 static int s_major = -1, s_minor, s_patchlevel;
40 if (s_major == -1)
41 if (sscanf (BASEVER, "%d.%d.%d", &s_major, &s_minor, &s_patchlevel) != 3)
43 sscanf (BASEVER, "%d.%d", &s_major, &s_minor);
44 s_patchlevel = 0;
47 if (major)
48 *major = s_major;
50 if (minor)
51 *minor = s_minor;
53 if (patchlevel)
54 *patchlevel = s_patchlevel;
58 /* Define __GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__ and __VERSION__. */
59 static void
60 define__GNUC__ (cpp_reader *pfile)
62 int major, minor, patchlevel;
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);
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)
77 if (flag_pic)
79 cpp_define_formatted (pfile, "__pic__=%d", flag_pic);
80 cpp_define_formatted (pfile, "__PIC__=%d", flag_pic);
82 if (flag_pie)
84 cpp_define_formatted (pfile, "__pie__=%d", flag_pie);
85 cpp_define_formatted (pfile, "__PIE__=%d", flag_pie);
88 if (optimize_size)
89 cpp_define (pfile, "__OPTIMIZE_SIZE__");
90 if (optimize)
91 cpp_define (pfile, "__OPTIMIZE__");
93 if (fast_math_flags_set_p (&global_options))
94 cpp_define (pfile, "__FAST_MATH__");
95 if (flag_signaling_nans)
96 cpp_define (pfile, "__SUPPORT_SNAN__");
98 cpp_define_formatted (pfile, "__FINITE_MATH_ONLY__=%d",
99 flag_finite_math_only);
103 /* Define built-in macros for LP64 targets. */
104 static void
105 define_builtin_macros_for_lp64 (cpp_reader *pfile)
107 if (TYPE_PRECISION (long_integer_type_node) == 64
108 && POINTER_SIZE == 64
109 && TYPE_PRECISION (integer_type_node) == 32)
111 cpp_define (pfile, "_LP64");
112 cpp_define (pfile, "__LP64__");
117 /* Define macros for size of basic C types. */
118 static void
119 define_builtin_macros_for_type_sizes (cpp_reader *pfile)
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))
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);
134 #undef define_type_sizeof
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);
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");
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
153 /* Assert that we're only dealing with the PDP11 case. */
154 gcc_assert (!BYTES_BIG_ENDIAN);
155 gcc_assert (WORDS_BIG_ENDIAN);
157 cpp_define (pfile, "__BYTE_ORDER__=__ORDER_PDP_ENDIAN__");
160 cpp_define_formatted (pfile, "__FLOAT_WORD_ORDER__=%s",
161 (targetm.float_words_big_endian ()
162 ? "__ORDER_BIG_ENDIAN__"
163 : "__ORDER_LITTLE_ENDIAN__"));
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);
172 /* Define macros builtins common to all language performing CPP
173 preprocessing. */
174 void
175 define_language_independent_builtin_macros (cpp_reader *pfile)
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);