1/* Define builtin-in macros for all front ends that perform preprocessing 2 Copyright (C) 2010-2020 Free Software Foundation, Inc. 3 4This file is part of GCC. 5 6GCC is free software; you can redistribute it and/or modify it under 7the terms of the GNU General Public License as published by the Free 8Software Foundation; either version 3, or (at your option) any later 9version. 10 11GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12WARRANTY; without even the implied warranty of MERCHANTABILITY or 13FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14for more details. 15 16You should have received a copy of the GNU General Public License 17along 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 "memmodel.h" 24#include "target.h" 25#include "tree.h" 26#include "version.h" 27#include "flags.h" 28#include "cpplib.h" 29#include "cppbuiltin.h" 30 31 32/* Parse a BASEVER version string of the format "major.minor.patchlevel" 33 or "major.minor" to extract its components. */ 34void 35parse_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__. */ 58static void 59define__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. */ 79static void 80define_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 (flag_sanitize & SANITIZE_UNDEFINED) 97 cpp_define (pfile, "__SANITIZE_UNDEFINED__"); 98 99 if (flag_sanitize & SANITIZE_LEAK) 100 cpp_define (pfile, "__SANITIZE_LEAK__"); 101 102 if (flag_sanitize & SANITIZE_THREAD) 103 cpp_define (pfile, "__SANITIZE_THREAD__"); 104 105 if (optimize_size) 106 cpp_define (pfile, "__OPTIMIZE_SIZE__"); 107 if (optimize) 108 cpp_define (pfile, "__OPTIMIZE__"); 109 110 if (fast_math_flags_set_p (&global_options)) 111 cpp_define (pfile, "__FAST_MATH__"); 112 if (flag_signaling_nans) 113 cpp_define (pfile, "__SUPPORT_SNAN__"); 114 if (!flag_errno_math) 115 cpp_define (pfile, "__NO_MATH_ERRNO__"); 116 117 cpp_define_formatted (pfile, "__FINITE_MATH_ONLY__=%d", 118 flag_finite_math_only); 119} 120 121 122/* Define built-in macros for LP64 targets. */ 123static void 124define_builtin_macros_for_lp64 (cpp_reader *pfile) 125{ 126 if (TYPE_PRECISION (long_integer_type_node) == 64 127 && POINTER_SIZE == 64 128 && TYPE_PRECISION (integer_type_node) == 32) 129 { 130 cpp_define (pfile, "_LP64"); 131 cpp_define (pfile, "__LP64__"); 132 } 133} 134 135 136/* Define macros for size of basic C types. */ 137static void 138define_builtin_macros_for_type_sizes (cpp_reader *pfile) 139{ 140#define define_type_sizeof(NAME, TYPE) \ 141 cpp_define_formatted (pfile, NAME"=" HOST_WIDE_INT_PRINT_DEC, \ 142 tree_to_uhwi (TYPE_SIZE_UNIT (TYPE))) 143 144 define_type_sizeof ("__SIZEOF_INT__", integer_type_node); 145 define_type_sizeof ("__SIZEOF_LONG__", long_integer_type_node); 146 define_type_sizeof ("__SIZEOF_LONG_LONG__", long_long_integer_type_node); 147 define_type_sizeof ("__SIZEOF_SHORT__", short_integer_type_node); 148 define_type_sizeof ("__SIZEOF_FLOAT__", float_type_node); 149 define_type_sizeof ("__SIZEOF_DOUBLE__", double_type_node); 150 define_type_sizeof ("__SIZEOF_LONG_DOUBLE__", long_double_type_node); 151 define_type_sizeof ("__SIZEOF_SIZE_T__", size_type_node); 152 153#undef define_type_sizeof 154 155 cpp_define_formatted (pfile, "__CHAR_BIT__=%u", 156 TYPE_PRECISION (char_type_node)); 157 cpp_define_formatted (pfile, "__BIGGEST_ALIGNMENT__=%d", 158 BIGGEST_ALIGNMENT / BITS_PER_UNIT); 159 160 /* Define constants useful for implementing endian.h. */ 161 cpp_define (pfile, "__ORDER_LITTLE_ENDIAN__=1234"); 162 cpp_define (pfile, "__ORDER_BIG_ENDIAN__=4321"); 163 cpp_define (pfile, "__ORDER_PDP_ENDIAN__=3412"); 164 165 if (WORDS_BIG_ENDIAN == BYTES_BIG_ENDIAN) 166 cpp_define_formatted (pfile, "__BYTE_ORDER__=%s", 167 (WORDS_BIG_ENDIAN 168 ? "__ORDER_BIG_ENDIAN__" 169 : "__ORDER_LITTLE_ENDIAN__")); 170 else 171 { 172 /* Assert that we're only dealing with the PDP11 case. */ 173 gcc_assert (!BYTES_BIG_ENDIAN); 174 gcc_assert (WORDS_BIG_ENDIAN); 175 176 cpp_define (pfile, "__BYTE_ORDER__=__ORDER_PDP_ENDIAN__"); 177 } 178 179 cpp_define_formatted (pfile, "__FLOAT_WORD_ORDER__=%s", 180 (targetm.float_words_big_endian () 181 ? "__ORDER_BIG_ENDIAN__" 182 : "__ORDER_LITTLE_ENDIAN__")); 183 184 /* ptr_type_node can't be used here since ptr_mode is only set when 185 toplev calls backend_init which is not done with -E switch. */ 186 cpp_define_formatted (pfile, "__SIZEOF_POINTER__=%d", 187 1 << ceil_log2 ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)); 188} 189 190 191/* Define macros builtins common to all language performing CPP 192 preprocessing. */ 193void 194define_language_independent_builtin_macros (cpp_reader *pfile) 195{ 196 define__GNUC__ (pfile); 197 define_builtin_macros_for_compilation_flags (pfile); 198 define_builtin_macros_for_lp64 (pfile); 199 define_builtin_macros_for_type_sizes (pfile); 200} 201