1 /* Define builtin-in macros for all front ends that perform preprocessing 2 Copyright (C) 2010-2018 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 "cpp-id-data.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_THREAD) 97 cpp_define (pfile, "__SANITIZE_THREAD__"); 98 99 if (optimize_size) 100 cpp_define (pfile, "__OPTIMIZE_SIZE__"); 101 if (optimize) 102 cpp_define (pfile, "__OPTIMIZE__"); 103 104 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__"); 110 111 cpp_define_formatted (pfile, "__FINITE_MATH_ONLY__=%d", 112 flag_finite_math_only); 113 114 if (flag_check_pointer_bounds) 115 cpp_define (pfile, "__CHKP__"); 116 } 117 118 119 /* Define built-in macros for LP64 targets. */ 120 static void 121 define_builtin_macros_for_lp64 (cpp_reader *pfile) 122 { 123 if (TYPE_PRECISION (long_integer_type_node) == 64 124 && POINTER_SIZE == 64 125 && TYPE_PRECISION (integer_type_node) == 32) 126 { 127 cpp_define (pfile, "_LP64"); 128 cpp_define (pfile, "__LP64__"); 129 } 130 } 131 132 133 /* Define macros for size of basic C types. */ 134 static void 135 define_builtin_macros_for_type_sizes (cpp_reader *pfile) 136 { 137 #define define_type_sizeof(NAME, TYPE) \ 138 cpp_define_formatted (pfile, NAME"=" HOST_WIDE_INT_PRINT_DEC, \ 139 tree_to_uhwi (TYPE_SIZE_UNIT (TYPE))) 140 141 define_type_sizeof ("__SIZEOF_INT__", integer_type_node); 142 define_type_sizeof ("__SIZEOF_LONG__", long_integer_type_node); 143 define_type_sizeof ("__SIZEOF_LONG_LONG__", long_long_integer_type_node); 144 define_type_sizeof ("__SIZEOF_SHORT__", short_integer_type_node); 145 define_type_sizeof ("__SIZEOF_FLOAT__", float_type_node); 146 define_type_sizeof ("__SIZEOF_DOUBLE__", double_type_node); 147 define_type_sizeof ("__SIZEOF_LONG_DOUBLE__", long_double_type_node); 148 define_type_sizeof ("__SIZEOF_SIZE_T__", size_type_node); 149 150 #undef define_type_sizeof 151 152 cpp_define_formatted (pfile, "__CHAR_BIT__=%u", 153 TYPE_PRECISION (char_type_node)); 154 cpp_define_formatted (pfile, "__BIGGEST_ALIGNMENT__=%d", 155 BIGGEST_ALIGNMENT / BITS_PER_UNIT); 156 157 /* Define constants useful for implementing endian.h. */ 158 cpp_define (pfile, "__ORDER_LITTLE_ENDIAN__=1234"); 159 cpp_define (pfile, "__ORDER_BIG_ENDIAN__=4321"); 160 cpp_define (pfile, "__ORDER_PDP_ENDIAN__=3412"); 161 162 if (WORDS_BIG_ENDIAN == BYTES_BIG_ENDIAN) 163 cpp_define_formatted (pfile, "__BYTE_ORDER__=%s", 164 (WORDS_BIG_ENDIAN 165 ? "__ORDER_BIG_ENDIAN__" 166 : "__ORDER_LITTLE_ENDIAN__")); 167 else 168 { 169 /* Assert that we're only dealing with the PDP11 case. */ 170 gcc_assert (!BYTES_BIG_ENDIAN); 171 gcc_assert (WORDS_BIG_ENDIAN); 172 173 cpp_define (pfile, "__BYTE_ORDER__=__ORDER_PDP_ENDIAN__"); 174 } 175 176 cpp_define_formatted (pfile, "__FLOAT_WORD_ORDER__=%s", 177 (targetm.float_words_big_endian () 178 ? "__ORDER_BIG_ENDIAN__" 179 : "__ORDER_LITTLE_ENDIAN__")); 180 181 /* ptr_type_node can't be used here since ptr_mode is only set when 182 toplev calls backend_init which is not done with -E switch. */ 183 cpp_define_formatted (pfile, "__SIZEOF_POINTER__=%d", 184 1 << ceil_log2 ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)); 185 } 186 187 188 /* Define macros builtins common to all language performing CPP 189 preprocessing. */ 190 void 191 define_language_independent_builtin_macros (cpp_reader *pfile) 192 { 193 define__GNUC__ (pfile); 194 define_builtin_macros_for_compilation_flags (pfile); 195 define_builtin_macros_for_lp64 (pfile); 196 define_builtin_macros_for_type_sizes (pfile); 197 } 198