/* Define builtin-in macros for all front ends that perform preprocessing Copyright (C) 2010-2020 Free Software Foundation, Inc. This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see . */ #include "config.h" #include "system.h" #include "coretypes.h" #include "memmodel.h" #include "target.h" #include "tree.h" #include "version.h" #include "flags.h" #include "cpplib.h" #include "cppbuiltin.h" /* Parse a BASEVER version string of the format "major.minor.patchlevel" or "major.minor" to extract its components. */ void parse_basever (int *major, int *minor, int *patchlevel) { static int s_major = -1, s_minor, s_patchlevel; if (s_major == -1) if (sscanf (BASEVER, "%d.%d.%d", &s_major, &s_minor, &s_patchlevel) != 3) { sscanf (BASEVER, "%d.%d", &s_major, &s_minor); s_patchlevel = 0; } if (major) *major = s_major; if (minor) *minor = s_minor; if (patchlevel) *patchlevel = s_patchlevel; } /* Define __GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__ and __VERSION__. */ static void define__GNUC__ (cpp_reader *pfile) { int major, minor, patchlevel; parse_basever (&major, &minor, &patchlevel); cpp_define_formatted (pfile, "__GNUC__=%d", major); cpp_define_formatted (pfile, "__GNUC_MINOR__=%d", minor); cpp_define_formatted (pfile, "__GNUC_PATCHLEVEL__=%d", patchlevel); cpp_define_formatted (pfile, "__VERSION__=\"%s\"", version_string); cpp_define_formatted (pfile, "__ATOMIC_RELAXED=%d", MEMMODEL_RELAXED); cpp_define_formatted (pfile, "__ATOMIC_SEQ_CST=%d", MEMMODEL_SEQ_CST); cpp_define_formatted (pfile, "__ATOMIC_ACQUIRE=%d", MEMMODEL_ACQUIRE); cpp_define_formatted (pfile, "__ATOMIC_RELEASE=%d", MEMMODEL_RELEASE); cpp_define_formatted (pfile, "__ATOMIC_ACQ_REL=%d", MEMMODEL_ACQ_REL); cpp_define_formatted (pfile, "__ATOMIC_CONSUME=%d", MEMMODEL_CONSUME); } /* Define various built-in CPP macros that depend on language-independent compilation flags. */ static void define_builtin_macros_for_compilation_flags (cpp_reader *pfile) { if (flag_pic) { cpp_define_formatted (pfile, "__pic__=%d", flag_pic); cpp_define_formatted (pfile, "__PIC__=%d", flag_pic); } if (flag_pie) { cpp_define_formatted (pfile, "__pie__=%d", flag_pie); cpp_define_formatted (pfile, "__PIE__=%d", flag_pie); } if (flag_sanitize & SANITIZE_ADDRESS) cpp_define (pfile, "__SANITIZE_ADDRESS__"); if (flag_sanitize & SANITIZE_HWADDRESS) cpp_define (pfile, "__SANITIZE_HWADDRESS__"); if (flag_sanitize & SANITIZE_THREAD) cpp_define (pfile, "__SANITIZE_THREAD__"); if (optimize_size) cpp_define (pfile, "__OPTIMIZE_SIZE__"); if (optimize) cpp_define (pfile, "__OPTIMIZE__"); if (fast_math_flags_set_p (&global_options)) cpp_define (pfile, "__FAST_MATH__"); if (flag_signaling_nans) cpp_define (pfile, "__SUPPORT_SNAN__"); if (!flag_errno_math) cpp_define (pfile, "__NO_MATH_ERRNO__"); cpp_define_formatted (pfile, "__FINITE_MATH_ONLY__=%d", flag_finite_math_only); } /* Define built-in macros for LP64 targets. */ static void define_builtin_macros_for_lp64 (cpp_reader *pfile) { if (TYPE_PRECISION (long_integer_type_node) == 64 && POINTER_SIZE == 64 && TYPE_PRECISION (integer_type_node) == 32) { cpp_define (pfile, "_LP64"); cpp_define (pfile, "__LP64__"); } } /* Define macros for size of basic C types. */ static void define_builtin_macros_for_type_sizes (cpp_reader *pfile) { #define define_type_sizeof(NAME, TYPE) \ cpp_define_formatted (pfile, NAME"=" HOST_WIDE_INT_PRINT_DEC, \ tree_to_uhwi (TYPE_SIZE_UNIT (TYPE))) define_type_sizeof ("__SIZEOF_INT__", integer_type_node); define_type_sizeof ("__SIZEOF_LONG__", long_integer_type_node); define_type_sizeof ("__SIZEOF_LONG_LONG__", long_long_integer_type_node); define_type_sizeof ("__SIZEOF_SHORT__", short_integer_type_node); define_type_sizeof ("__SIZEOF_FLOAT__", float_type_node); define_type_sizeof ("__SIZEOF_DOUBLE__", double_type_node); define_type_sizeof ("__SIZEOF_LONG_DOUBLE__", long_double_type_node); define_type_sizeof ("__SIZEOF_SIZE_T__", size_type_node); #undef define_type_sizeof cpp_define_formatted (pfile, "__CHAR_BIT__=%u", TYPE_PRECISION (char_type_node)); cpp_define_formatted (pfile, "__BIGGEST_ALIGNMENT__=%d", BIGGEST_ALIGNMENT / BITS_PER_UNIT); /* Define constants useful for implementing endian.h. */ cpp_define (pfile, "__ORDER_LITTLE_ENDIAN__=1234"); cpp_define (pfile, "__ORDER_BIG_ENDIAN__=4321"); cpp_define (pfile, "__ORDER_PDP_ENDIAN__=3412"); if (WORDS_BIG_ENDIAN == BYTES_BIG_ENDIAN) cpp_define_formatted (pfile, "__BYTE_ORDER__=%s", (WORDS_BIG_ENDIAN ? "__ORDER_BIG_ENDIAN__" : "__ORDER_LITTLE_ENDIAN__")); else { /* Assert that we're only dealing with the PDP11 case. */ gcc_assert (!BYTES_BIG_ENDIAN); gcc_assert (WORDS_BIG_ENDIAN); cpp_define (pfile, "__BYTE_ORDER__=__ORDER_PDP_ENDIAN__"); } cpp_define_formatted (pfile, "__FLOAT_WORD_ORDER__=%s", (targetm.float_words_big_endian () ? "__ORDER_BIG_ENDIAN__" : "__ORDER_LITTLE_ENDIAN__")); /* ptr_type_node can't be used here since ptr_mode is only set when toplev calls backend_init which is not done with -E switch. */ cpp_define_formatted (pfile, "__SIZEOF_POINTER__=%d", 1 << ceil_log2 ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)); } /* Define macros builtins common to all language performing CPP preprocessing. */ void define_language_independent_builtin_macros (cpp_reader *pfile) { define__GNUC__ (pfile); define_builtin_macros_for_compilation_flags (pfile); define_builtin_macros_for_lp64 (pfile); define_builtin_macros_for_type_sizes (pfile); }