1 /* Define builtin-in macros for all front ends that perform preprocessing 2 Copyright (C) 2010-2016 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 "target.h" 24 #include "tree.h" 25 #include "version.h" 26 #include "flags.h" 27 #include "cpp-id-data.h" 28 #include "cppbuiltin.h" 29 30 31 /* Parse a BASEVER version string of the format "major.minor.patchlevel" 32 or "major.minor" to extract its components. */ 33 void 34 parse_basever (int *major, int *minor, int *patchlevel) 35 { 36 static int s_major = -1, s_minor, s_patchlevel; 37 38 if (s_major == -1) 39 if (sscanf (BASEVER, "%d.%d.%d", &s_major, &s_minor, &s_patchlevel) != 3) 40 { 41 sscanf (BASEVER, "%d.%d", &s_major, &s_minor); 42 s_patchlevel = 0; 43 } 44 45 if (major) 46 *major = s_major; 47 48 if (minor) 49 *minor = s_minor; 50 51 if (patchlevel) 52 *patchlevel = s_patchlevel; 53 } 54 55 56 /* Define __GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__ and __VERSION__. */ 57 static void 58 define__GNUC__ (cpp_reader *pfile) 59 { 60 int major, minor, patchlevel; 61 62 parse_basever (&major, &minor, &patchlevel); 63 cpp_define_formatted (pfile, "__GNUC__=%d", major); 64 cpp_define_formatted (pfile, "__GNUC_MINOR__=%d", minor); 65 cpp_define_formatted (pfile, "__GNUC_PATCHLEVEL__=%d", patchlevel); 66 cpp_define_formatted (pfile, "__VERSION__=\"%s\"", version_string); 67 cpp_define_formatted (pfile, "__ATOMIC_RELAXED=%d", MEMMODEL_RELAXED); 68 cpp_define_formatted (pfile, "__ATOMIC_SEQ_CST=%d", MEMMODEL_SEQ_CST); 69 cpp_define_formatted (pfile, "__ATOMIC_ACQUIRE=%d", MEMMODEL_ACQUIRE); 70 cpp_define_formatted (pfile, "__ATOMIC_RELEASE=%d", MEMMODEL_RELEASE); 71 cpp_define_formatted (pfile, "__ATOMIC_ACQ_REL=%d", MEMMODEL_ACQ_REL); 72 cpp_define_formatted (pfile, "__ATOMIC_CONSUME=%d", MEMMODEL_CONSUME); 73 } 74 75 76 /* Define various built-in CPP macros that depend on language-independent 77 compilation flags. */ 78 static void 79 define_builtin_macros_for_compilation_flags (cpp_reader *pfile) 80 { 81 if (flag_pic) 82 { 83 cpp_define_formatted (pfile, "__pic__=%d", flag_pic); 84 cpp_define_formatted (pfile, "__PIC__=%d", flag_pic); 85 } 86 if (flag_pie) 87 { 88 cpp_define_formatted (pfile, "__pie__=%d", flag_pie); 89 cpp_define_formatted (pfile, "__PIE__=%d", flag_pie); 90 } 91 92 if (flag_sanitize & SANITIZE_ADDRESS) 93 cpp_define (pfile, "__SANITIZE_ADDRESS__"); 94 95 if (optimize_size) 96 cpp_define (pfile, "__OPTIMIZE_SIZE__"); 97 if (optimize) 98 cpp_define (pfile, "__OPTIMIZE__"); 99 100 if (fast_math_flags_set_p (&global_options)) 101 cpp_define (pfile, "__FAST_MATH__"); 102 if (flag_signaling_nans) 103 cpp_define (pfile, "__SUPPORT_SNAN__"); 104 if (!flag_errno_math) 105 cpp_define (pfile, "__NO_MATH_ERRNO__"); 106 107 cpp_define_formatted (pfile, "__FINITE_MATH_ONLY__=%d", 108 flag_finite_math_only); 109 if (flag_cilkplus) 110 cpp_define (pfile, "__cilk=200"); 111 112 if (flag_check_pointer_bounds) 113 cpp_define (pfile, "__CHKP__"); 114 } 115 116 117 /* Define built-in macros for LP64 targets. */ 118 static void 119 define_builtin_macros_for_lp64 (cpp_reader *pfile) 120 { 121 if (TYPE_PRECISION (long_integer_type_node) == 64 122 && POINTER_SIZE == 64 123 && TYPE_PRECISION (integer_type_node) == 32) 124 { 125 cpp_define (pfile, "_LP64"); 126 cpp_define (pfile, "__LP64__"); 127 } 128 } 129 130 131 /* Define macros for size of basic C types. */ 132 static void 133 define_builtin_macros_for_type_sizes (cpp_reader *pfile) 134 { 135 #define define_type_sizeof(NAME, TYPE) \ 136 cpp_define_formatted (pfile, NAME"=" HOST_WIDE_INT_PRINT_DEC, \ 137 tree_to_uhwi (TYPE_SIZE_UNIT (TYPE))) 138 139 define_type_sizeof ("__SIZEOF_INT__", integer_type_node); 140 define_type_sizeof ("__SIZEOF_LONG__", long_integer_type_node); 141 define_type_sizeof ("__SIZEOF_LONG_LONG__", long_long_integer_type_node); 142 define_type_sizeof ("__SIZEOF_SHORT__", short_integer_type_node); 143 define_type_sizeof ("__SIZEOF_FLOAT__", float_type_node); 144 define_type_sizeof ("__SIZEOF_DOUBLE__", double_type_node); 145 define_type_sizeof ("__SIZEOF_LONG_DOUBLE__", long_double_type_node); 146 define_type_sizeof ("__SIZEOF_SIZE_T__", size_type_node); 147 148 #undef define_type_sizeof 149 150 cpp_define_formatted (pfile, "__CHAR_BIT__=%u", 151 TYPE_PRECISION (char_type_node)); 152 cpp_define_formatted (pfile, "__BIGGEST_ALIGNMENT__=%d", 153 BIGGEST_ALIGNMENT / BITS_PER_UNIT); 154 155 /* Define constants useful for implementing endian.h. */ 156 cpp_define (pfile, "__ORDER_LITTLE_ENDIAN__=1234"); 157 cpp_define (pfile, "__ORDER_BIG_ENDIAN__=4321"); 158 cpp_define (pfile, "__ORDER_PDP_ENDIAN__=3412"); 159 160 if (WORDS_BIG_ENDIAN == BYTES_BIG_ENDIAN) 161 cpp_define_formatted (pfile, "__BYTE_ORDER__=%s", 162 (WORDS_BIG_ENDIAN 163 ? "__ORDER_BIG_ENDIAN__" 164 : "__ORDER_LITTLE_ENDIAN__")); 165 else 166 { 167 /* Assert that we're only dealing with the PDP11 case. */ 168 gcc_assert (!BYTES_BIG_ENDIAN); 169 gcc_assert (WORDS_BIG_ENDIAN); 170 171 cpp_define (pfile, "__BYTE_ORDER__=__ORDER_PDP_ENDIAN__"); 172 } 173 174 cpp_define_formatted (pfile, "__FLOAT_WORD_ORDER__=%s", 175 (targetm.float_words_big_endian () 176 ? "__ORDER_BIG_ENDIAN__" 177 : "__ORDER_LITTLE_ENDIAN__")); 178 179 /* ptr_type_node can't be used here since ptr_mode is only set when 180 toplev calls backend_init which is not done with -E switch. */ 181 cpp_define_formatted (pfile, "__SIZEOF_POINTER__=%d", 182 1 << ceil_log2 ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)); 183 } 184 185 186 /* Define macros builtins common to all language performing CPP 187 preprocessing. */ 188 void 189 define_language_independent_builtin_macros (cpp_reader *pfile) 190 { 191 define__GNUC__ (pfile); 192 define_builtin_macros_for_compilation_flags (pfile); 193 define_builtin_macros_for_lp64 (pfile); 194 define_builtin_macros_for_type_sizes (pfile); 195 } 196