1 /* Define builtin-in macros for all front ends that perform preprocessing 2 Copyright (C) 2010-2013 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 "tm.h" 24 #include "tree.h" 25 #include "version.h" 26 #include "flags.h" 27 #include "cpp-id-data.h" 28 #include "cppbuiltin.h" 29 #include "target.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_asan) 94 cpp_define (pfile, "__SANITIZE_ADDRESS__"); 95 96 if (optimize_size) 97 cpp_define (pfile, "__OPTIMIZE_SIZE__"); 98 if (optimize) 99 cpp_define (pfile, "__OPTIMIZE__"); 100 101 if (fast_math_flags_set_p (&global_options)) 102 cpp_define (pfile, "__FAST_MATH__"); 103 if (flag_signaling_nans) 104 cpp_define (pfile, "__SUPPORT_SNAN__"); 105 106 cpp_define_formatted (pfile, "__FINITE_MATH_ONLY__=%d", 107 flag_finite_math_only); 108 } 109 110 111 /* Define built-in macros for LP64 targets. */ 112 static void 113 define_builtin_macros_for_lp64 (cpp_reader *pfile) 114 { 115 if (TYPE_PRECISION (long_integer_type_node) == 64 116 && POINTER_SIZE == 64 117 && TYPE_PRECISION (integer_type_node) == 32) 118 { 119 cpp_define (pfile, "_LP64"); 120 cpp_define (pfile, "__LP64__"); 121 } 122 } 123 124 125 /* Define macros for size of basic C types. */ 126 static void 127 define_builtin_macros_for_type_sizes (cpp_reader *pfile) 128 { 129 #define define_type_sizeof(NAME, TYPE) \ 130 cpp_define_formatted (pfile, NAME"="HOST_WIDE_INT_PRINT_DEC, \ 131 tree_low_cst (TYPE_SIZE_UNIT (TYPE), 1)) 132 133 define_type_sizeof ("__SIZEOF_INT__", integer_type_node); 134 define_type_sizeof ("__SIZEOF_LONG__", long_integer_type_node); 135 define_type_sizeof ("__SIZEOF_LONG_LONG__", long_long_integer_type_node); 136 define_type_sizeof ("__SIZEOF_SHORT__", short_integer_type_node); 137 define_type_sizeof ("__SIZEOF_FLOAT__", float_type_node); 138 define_type_sizeof ("__SIZEOF_DOUBLE__", double_type_node); 139 define_type_sizeof ("__SIZEOF_LONG_DOUBLE__", long_double_type_node); 140 define_type_sizeof ("__SIZEOF_SIZE_T__", size_type_node); 141 142 #undef define_type_sizeof 143 144 cpp_define_formatted (pfile, "__CHAR_BIT__=%u", 145 TYPE_PRECISION (char_type_node)); 146 cpp_define_formatted (pfile, "__BIGGEST_ALIGNMENT__=%d", 147 BIGGEST_ALIGNMENT / BITS_PER_UNIT); 148 149 /* Define constants useful for implementing endian.h. */ 150 cpp_define (pfile, "__ORDER_LITTLE_ENDIAN__=1234"); 151 cpp_define (pfile, "__ORDER_BIG_ENDIAN__=4321"); 152 cpp_define (pfile, "__ORDER_PDP_ENDIAN__=3412"); 153 154 if (WORDS_BIG_ENDIAN == BYTES_BIG_ENDIAN) 155 cpp_define_formatted (pfile, "__BYTE_ORDER__=%s", 156 (WORDS_BIG_ENDIAN 157 ? "__ORDER_BIG_ENDIAN__" 158 : "__ORDER_LITTLE_ENDIAN__")); 159 else 160 { 161 /* Assert that we're only dealing with the PDP11 case. */ 162 gcc_assert (!BYTES_BIG_ENDIAN); 163 gcc_assert (WORDS_BIG_ENDIAN); 164 165 cpp_define (pfile, "__BYTE_ORDER__=__ORDER_PDP_ENDIAN__"); 166 } 167 168 cpp_define_formatted (pfile, "__FLOAT_WORD_ORDER__=%s", 169 (targetm.float_words_big_endian () 170 ? "__ORDER_BIG_ENDIAN__" 171 : "__ORDER_LITTLE_ENDIAN__")); 172 173 /* ptr_type_node can't be used here since ptr_mode is only set when 174 toplev calls backend_init which is not done with -E switch. */ 175 cpp_define_formatted (pfile, "__SIZEOF_POINTER__=%d", 176 POINTER_SIZE / BITS_PER_UNIT); 177 } 178 179 180 /* Define macros builtins common to all language performing CPP 181 preprocessing. */ 182 void 183 define_language_independent_builtin_macros (cpp_reader *pfile) 184 { 185 define__GNUC__ (pfile); 186 define_builtin_macros_for_compilation_flags (pfile); 187 define_builtin_macros_for_lp64 (pfile); 188 define_builtin_macros_for_type_sizes (pfile); 189 } 190