1 /* Define builtin-in macros for all front ends that perform preprocessing
2 Copyright (C) 2010-2015 Free Software Foundation, Inc.
4 This file is part of GCC.
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
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
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/>. */
22 #include "coretypes.h"
30 #include "cpp-id-data.h"
31 #include "cppbuiltin.h"
35 /* Parse a BASEVER version string of the format "major.minor.patchlevel"
36 or "major.minor" to extract its components. */
38 parse_basever (int *major
, int *minor
, int *patchlevel
)
40 static int s_major
= -1, s_minor
, s_patchlevel
;
43 if (sscanf (BASEVER
, "%d.%d.%d", &s_major
, &s_minor
, &s_patchlevel
) != 3)
45 sscanf (BASEVER
, "%d.%d", &s_major
, &s_minor
);
56 *patchlevel
= s_patchlevel
;
60 /* Define __GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__ and __VERSION__. */
62 define__GNUC__ (cpp_reader
*pfile
)
64 int major
, minor
, patchlevel
;
66 parse_basever (&major
, &minor
, &patchlevel
);
67 cpp_define_formatted (pfile
, "__GNUC__=%d", major
);
68 cpp_define_formatted (pfile
, "__GNUC_MINOR__=%d", minor
);
69 cpp_define_formatted (pfile
, "__GNUC_PATCHLEVEL__=%d", patchlevel
);
70 cpp_define_formatted (pfile
, "__VERSION__=\"%s\"", version_string
);
71 cpp_define_formatted (pfile
, "__ATOMIC_RELAXED=%d", MEMMODEL_RELAXED
);
72 cpp_define_formatted (pfile
, "__ATOMIC_SEQ_CST=%d", MEMMODEL_SEQ_CST
);
73 cpp_define_formatted (pfile
, "__ATOMIC_ACQUIRE=%d", MEMMODEL_ACQUIRE
);
74 cpp_define_formatted (pfile
, "__ATOMIC_RELEASE=%d", MEMMODEL_RELEASE
);
75 cpp_define_formatted (pfile
, "__ATOMIC_ACQ_REL=%d", MEMMODEL_ACQ_REL
);
76 cpp_define_formatted (pfile
, "__ATOMIC_CONSUME=%d", MEMMODEL_CONSUME
);
80 /* Define various built-in CPP macros that depend on language-independent
83 define_builtin_macros_for_compilation_flags (cpp_reader
*pfile
)
87 cpp_define_formatted (pfile
, "__pic__=%d", flag_pic
);
88 cpp_define_formatted (pfile
, "__PIC__=%d", flag_pic
);
92 cpp_define_formatted (pfile
, "__pie__=%d", flag_pie
);
93 cpp_define_formatted (pfile
, "__PIE__=%d", flag_pie
);
96 if (flag_sanitize
& SANITIZE_ADDRESS
)
97 cpp_define (pfile
, "__SANITIZE_ADDRESS__");
100 cpp_define (pfile
, "__OPTIMIZE_SIZE__");
102 cpp_define (pfile
, "__OPTIMIZE__");
104 if (fast_math_flags_set_p (&global_options
))
105 cpp_define (pfile
, "__FAST_MATH__");
106 if (flag_signaling_nans
)
107 cpp_define (pfile
, "__SUPPORT_SNAN__");
108 if (!flag_errno_math
)
109 cpp_define (pfile
, "__NO_MATH_ERRNO__");
111 cpp_define_formatted (pfile
, "__FINITE_MATH_ONLY__=%d",
112 flag_finite_math_only
);
114 cpp_define (pfile
, "__cilk=200");
116 if (flag_check_pointer_bounds
)
117 cpp_define (pfile
, "__CHKP__");
121 /* Define built-in macros for LP64 targets. */
123 define_builtin_macros_for_lp64 (cpp_reader
*pfile
)
125 if (TYPE_PRECISION (long_integer_type_node
) == 64
126 && POINTER_SIZE
== 64
127 && TYPE_PRECISION (integer_type_node
) == 32)
129 cpp_define (pfile
, "_LP64");
130 cpp_define (pfile
, "__LP64__");
135 /* Define macros for size of basic C types. */
137 define_builtin_macros_for_type_sizes (cpp_reader
*pfile
)
139 #define define_type_sizeof(NAME, TYPE) \
140 cpp_define_formatted (pfile, NAME"=" HOST_WIDE_INT_PRINT_DEC, \
141 tree_to_uhwi (TYPE_SIZE_UNIT (TYPE)))
143 define_type_sizeof ("__SIZEOF_INT__", integer_type_node
);
144 define_type_sizeof ("__SIZEOF_LONG__", long_integer_type_node
);
145 define_type_sizeof ("__SIZEOF_LONG_LONG__", long_long_integer_type_node
);
146 define_type_sizeof ("__SIZEOF_SHORT__", short_integer_type_node
);
147 define_type_sizeof ("__SIZEOF_FLOAT__", float_type_node
);
148 define_type_sizeof ("__SIZEOF_DOUBLE__", double_type_node
);
149 define_type_sizeof ("__SIZEOF_LONG_DOUBLE__", long_double_type_node
);
150 define_type_sizeof ("__SIZEOF_SIZE_T__", size_type_node
);
152 #undef define_type_sizeof
154 cpp_define_formatted (pfile
, "__CHAR_BIT__=%u",
155 TYPE_PRECISION (char_type_node
));
156 cpp_define_formatted (pfile
, "__BIGGEST_ALIGNMENT__=%d",
157 BIGGEST_ALIGNMENT
/ BITS_PER_UNIT
);
159 /* Define constants useful for implementing endian.h. */
160 cpp_define (pfile
, "__ORDER_LITTLE_ENDIAN__=1234");
161 cpp_define (pfile
, "__ORDER_BIG_ENDIAN__=4321");
162 cpp_define (pfile
, "__ORDER_PDP_ENDIAN__=3412");
164 if (WORDS_BIG_ENDIAN
== BYTES_BIG_ENDIAN
)
165 cpp_define_formatted (pfile
, "__BYTE_ORDER__=%s",
167 ? "__ORDER_BIG_ENDIAN__"
168 : "__ORDER_LITTLE_ENDIAN__"));
171 /* Assert that we're only dealing with the PDP11 case. */
172 gcc_assert (!BYTES_BIG_ENDIAN
);
173 gcc_assert (WORDS_BIG_ENDIAN
);
175 cpp_define (pfile
, "__BYTE_ORDER__=__ORDER_PDP_ENDIAN__");
178 cpp_define_formatted (pfile
, "__FLOAT_WORD_ORDER__=%s",
179 (targetm
.float_words_big_endian ()
180 ? "__ORDER_BIG_ENDIAN__"
181 : "__ORDER_LITTLE_ENDIAN__"));
183 /* ptr_type_node can't be used here since ptr_mode is only set when
184 toplev calls backend_init which is not done with -E switch. */
185 cpp_define_formatted (pfile
, "__SIZEOF_POINTER__=%d",
186 1 << ceil_log2 ((POINTER_SIZE
+ BITS_PER_UNIT
- 1) / BITS_PER_UNIT
));
190 /* Define macros builtins common to all language performing CPP
193 define_language_independent_builtin_macros (cpp_reader
*pfile
)
195 define__GNUC__ (pfile
);
196 define_builtin_macros_for_compilation_flags (pfile
);
197 define_builtin_macros_for_lp64 (pfile
);
198 define_builtin_macros_for_type_sizes (pfile
);