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"
33 #include "cpp-id-data.h"
34 #include "cppbuiltin.h"
38 /* Parse a BASEVER version string of the format "major.minor.patchlevel"
39 or "major.minor" to extract its components. */
41 parse_basever (int *major
, int *minor
, int *patchlevel
)
43 static int s_major
= -1, s_minor
, s_patchlevel
;
46 if (sscanf (BASEVER
, "%d.%d.%d", &s_major
, &s_minor
, &s_patchlevel
) != 3)
48 sscanf (BASEVER
, "%d.%d", &s_major
, &s_minor
);
59 *patchlevel
= s_patchlevel
;
63 /* Define __GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__ and __VERSION__. */
65 define__GNUC__ (cpp_reader
*pfile
)
67 int major
, minor
, patchlevel
;
69 parse_basever (&major
, &minor
, &patchlevel
);
70 cpp_define_formatted (pfile
, "__GNUC__=%d", major
);
71 cpp_define_formatted (pfile
, "__GNUC_MINOR__=%d", minor
);
72 cpp_define_formatted (pfile
, "__GNUC_PATCHLEVEL__=%d", patchlevel
);
73 cpp_define_formatted (pfile
, "__VERSION__=\"%s\"", version_string
);
74 cpp_define_formatted (pfile
, "__ATOMIC_RELAXED=%d", MEMMODEL_RELAXED
);
75 cpp_define_formatted (pfile
, "__ATOMIC_SEQ_CST=%d", MEMMODEL_SEQ_CST
);
76 cpp_define_formatted (pfile
, "__ATOMIC_ACQUIRE=%d", MEMMODEL_ACQUIRE
);
77 cpp_define_formatted (pfile
, "__ATOMIC_RELEASE=%d", MEMMODEL_RELEASE
);
78 cpp_define_formatted (pfile
, "__ATOMIC_ACQ_REL=%d", MEMMODEL_ACQ_REL
);
79 cpp_define_formatted (pfile
, "__ATOMIC_CONSUME=%d", MEMMODEL_CONSUME
);
83 /* Define various built-in CPP macros that depend on language-independent
86 define_builtin_macros_for_compilation_flags (cpp_reader
*pfile
)
90 cpp_define_formatted (pfile
, "__pic__=%d", flag_pic
);
91 cpp_define_formatted (pfile
, "__PIC__=%d", flag_pic
);
95 cpp_define_formatted (pfile
, "__pie__=%d", flag_pie
);
96 cpp_define_formatted (pfile
, "__PIE__=%d", flag_pie
);
99 if (flag_sanitize
& SANITIZE_ADDRESS
)
100 cpp_define (pfile
, "__SANITIZE_ADDRESS__");
103 cpp_define (pfile
, "__OPTIMIZE_SIZE__");
105 cpp_define (pfile
, "__OPTIMIZE__");
107 if (fast_math_flags_set_p (&global_options
))
108 cpp_define (pfile
, "__FAST_MATH__");
109 if (flag_signaling_nans
)
110 cpp_define (pfile
, "__SUPPORT_SNAN__");
111 if (!flag_errno_math
)
112 cpp_define (pfile
, "__NO_MATH_ERRNO__");
114 cpp_define_formatted (pfile
, "__FINITE_MATH_ONLY__=%d",
115 flag_finite_math_only
);
117 cpp_define (pfile
, "__cilk=200");
119 if (flag_check_pointer_bounds
)
120 cpp_define (pfile
, "__CHKP__");
124 /* Define built-in macros for LP64 targets. */
126 define_builtin_macros_for_lp64 (cpp_reader
*pfile
)
128 if (TYPE_PRECISION (long_integer_type_node
) == 64
129 && POINTER_SIZE
== 64
130 && TYPE_PRECISION (integer_type_node
) == 32)
132 cpp_define (pfile
, "_LP64");
133 cpp_define (pfile
, "__LP64__");
138 /* Define macros for size of basic C types. */
140 define_builtin_macros_for_type_sizes (cpp_reader
*pfile
)
142 #define define_type_sizeof(NAME, TYPE) \
143 cpp_define_formatted (pfile, NAME"=" HOST_WIDE_INT_PRINT_DEC, \
144 tree_to_uhwi (TYPE_SIZE_UNIT (TYPE)))
146 define_type_sizeof ("__SIZEOF_INT__", integer_type_node
);
147 define_type_sizeof ("__SIZEOF_LONG__", long_integer_type_node
);
148 define_type_sizeof ("__SIZEOF_LONG_LONG__", long_long_integer_type_node
);
149 define_type_sizeof ("__SIZEOF_SHORT__", short_integer_type_node
);
150 define_type_sizeof ("__SIZEOF_FLOAT__", float_type_node
);
151 define_type_sizeof ("__SIZEOF_DOUBLE__", double_type_node
);
152 define_type_sizeof ("__SIZEOF_LONG_DOUBLE__", long_double_type_node
);
153 define_type_sizeof ("__SIZEOF_SIZE_T__", size_type_node
);
155 #undef define_type_sizeof
157 cpp_define_formatted (pfile
, "__CHAR_BIT__=%u",
158 TYPE_PRECISION (char_type_node
));
159 cpp_define_formatted (pfile
, "__BIGGEST_ALIGNMENT__=%d",
160 BIGGEST_ALIGNMENT
/ BITS_PER_UNIT
);
162 /* Define constants useful for implementing endian.h. */
163 cpp_define (pfile
, "__ORDER_LITTLE_ENDIAN__=1234");
164 cpp_define (pfile
, "__ORDER_BIG_ENDIAN__=4321");
165 cpp_define (pfile
, "__ORDER_PDP_ENDIAN__=3412");
167 if (WORDS_BIG_ENDIAN
== BYTES_BIG_ENDIAN
)
168 cpp_define_formatted (pfile
, "__BYTE_ORDER__=%s",
170 ? "__ORDER_BIG_ENDIAN__"
171 : "__ORDER_LITTLE_ENDIAN__"));
174 /* Assert that we're only dealing with the PDP11 case. */
175 gcc_assert (!BYTES_BIG_ENDIAN
);
176 gcc_assert (WORDS_BIG_ENDIAN
);
178 cpp_define (pfile
, "__BYTE_ORDER__=__ORDER_PDP_ENDIAN__");
181 cpp_define_formatted (pfile
, "__FLOAT_WORD_ORDER__=%s",
182 (targetm
.float_words_big_endian ()
183 ? "__ORDER_BIG_ENDIAN__"
184 : "__ORDER_LITTLE_ENDIAN__"));
186 /* ptr_type_node can't be used here since ptr_mode is only set when
187 toplev calls backend_init which is not done with -E switch. */
188 cpp_define_formatted (pfile
, "__SIZEOF_POINTER__=%d",
189 1 << ceil_log2 ((POINTER_SIZE
+ BITS_PER_UNIT
- 1) / BITS_PER_UNIT
));
193 /* Define macros builtins common to all language performing CPP
196 define_language_independent_builtin_macros (cpp_reader
*pfile
)
198 define__GNUC__ (pfile
);
199 define_builtin_macros_for_compilation_flags (pfile
);
200 define_builtin_macros_for_lp64 (pfile
);
201 define_builtin_macros_for_type_sizes (pfile
);