1 /* Define builtin-in macros for all front ends that perform preprocessing 2 Copyright (C) 2010-2022 Free Software Foundation, Inc. 3 4 This file is part of GCC. 5 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 9 version. 10 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 14 for more details. 15 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/>. */ 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. */ 34 void 35 parse_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__. */ 58 static void 59 define__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. */ 79 static void 80 define_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_HWADDRESS) 97 cpp_define (pfile, "__SANITIZE_HWADDRESS__"); 98 99 if (flag_sanitize & SANITIZE_UNDEFINED) 100 cpp_define (pfile, "__SANITIZE_UNDEFINED__"); 101 102 if (flag_sanitize & SANITIZE_LEAK) 103 cpp_define (pfile, "__SANITIZE_LEAK__"); 104 105 if (flag_sanitize & SANITIZE_THREAD) 106 cpp_define (pfile, "__SANITIZE_THREAD__"); 107 108 if (optimize_size) 109 cpp_define (pfile, "__OPTIMIZE_SIZE__"); 110 if (optimize) 111 cpp_define (pfile, "__OPTIMIZE__"); 112 113 if (fast_math_flags_set_p (&global_options)) 114 cpp_define (pfile, "__FAST_MATH__"); 115 if (flag_signaling_nans) 116 cpp_define (pfile, "__SUPPORT_SNAN__"); 117 if (!flag_errno_math) 118 cpp_define (pfile, "__NO_MATH_ERRNO__"); 119 if (flag_reciprocal_math) 120 cpp_define (pfile, "__RECIPROCAL_MATH__"); 121 if (!flag_signed_zeros) 122 cpp_define (pfile, "__NO_SIGNED_ZEROS__"); 123 if (!flag_trapping_math) 124 cpp_define (pfile, "__NO_TRAPPING_MATH__"); 125 if (flag_associative_math) 126 cpp_define (pfile, "__ASSOCIATIVE_MATH__"); 127 if (flag_rounding_math) 128 cpp_define (pfile, "__ROUNDING_MATH__"); 129 130 cpp_define_formatted (pfile, "__FINITE_MATH_ONLY__=%d", 131 flag_finite_math_only); 132 } 133 134 135 /* Define built-in macros for LP64 targets. */ 136 static void 137 define_builtin_macros_for_lp64 (cpp_reader *pfile) 138 { 139 if (TYPE_PRECISION (long_integer_type_node) == 64 140 && POINTER_SIZE == 64 141 && TYPE_PRECISION (integer_type_node) == 32) 142 { 143 cpp_define (pfile, "_LP64"); 144 cpp_define (pfile, "__LP64__"); 145 } 146 } 147 148 149 /* Define macros for size of basic C types. */ 150 static void 151 define_builtin_macros_for_type_sizes (cpp_reader *pfile) 152 { 153 #define define_type_sizeof(NAME, TYPE) \ 154 cpp_define_formatted (pfile, NAME"=" HOST_WIDE_INT_PRINT_DEC, \ 155 tree_to_uhwi (TYPE_SIZE_UNIT (TYPE))) 156 157 define_type_sizeof ("__SIZEOF_INT__", integer_type_node); 158 define_type_sizeof ("__SIZEOF_LONG__", long_integer_type_node); 159 define_type_sizeof ("__SIZEOF_LONG_LONG__", long_long_integer_type_node); 160 define_type_sizeof ("__SIZEOF_SHORT__", short_integer_type_node); 161 define_type_sizeof ("__SIZEOF_FLOAT__", float_type_node); 162 define_type_sizeof ("__SIZEOF_DOUBLE__", double_type_node); 163 define_type_sizeof ("__SIZEOF_LONG_DOUBLE__", long_double_type_node); 164 define_type_sizeof ("__SIZEOF_SIZE_T__", size_type_node); 165 166 #undef define_type_sizeof 167 168 cpp_define_formatted (pfile, "__CHAR_BIT__=%u", 169 TYPE_PRECISION (char_type_node)); 170 cpp_define_formatted (pfile, "__BIGGEST_ALIGNMENT__=%d", 171 BIGGEST_ALIGNMENT / BITS_PER_UNIT); 172 173 /* Define constants useful for implementing endian.h. */ 174 cpp_define (pfile, "__ORDER_LITTLE_ENDIAN__=1234"); 175 cpp_define (pfile, "__ORDER_BIG_ENDIAN__=4321"); 176 cpp_define (pfile, "__ORDER_PDP_ENDIAN__=3412"); 177 178 if (WORDS_BIG_ENDIAN == BYTES_BIG_ENDIAN) 179 cpp_define_formatted (pfile, "__BYTE_ORDER__=%s", 180 (WORDS_BIG_ENDIAN 181 ? "__ORDER_BIG_ENDIAN__" 182 : "__ORDER_LITTLE_ENDIAN__")); 183 else 184 { 185 /* Assert that we're only dealing with the PDP11 case. */ 186 gcc_assert (!BYTES_BIG_ENDIAN); 187 gcc_assert (WORDS_BIG_ENDIAN); 188 189 cpp_define (pfile, "__BYTE_ORDER__=__ORDER_PDP_ENDIAN__"); 190 } 191 192 cpp_define_formatted (pfile, "__FLOAT_WORD_ORDER__=%s", 193 (targetm.float_words_big_endian () 194 ? "__ORDER_BIG_ENDIAN__" 195 : "__ORDER_LITTLE_ENDIAN__")); 196 197 /* ptr_type_node can't be used here since ptr_mode is only set when 198 toplev calls backend_init which is not done with -E switch. */ 199 cpp_define_formatted (pfile, "__SIZEOF_POINTER__=%d", 200 1 << ceil_log2 ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)); 201 } 202 203 204 /* Define macros builtins common to all language performing CPP 205 preprocessing. */ 206 void 207 define_language_independent_builtin_macros (cpp_reader *pfile) 208 { 209 define__GNUC__ (pfile); 210 define_builtin_macros_for_compilation_flags (pfile); 211 define_builtin_macros_for_lp64 (pfile); 212 define_builtin_macros_for_type_sizes (pfile); 213 } 214
Indexes created Mon Mar 02 05:31:46 UTC 2026