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/* Define builtin-in macros for all front ends that perform preprocessing
Copyright (C) 2010
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
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "tree.h"
#include "version.h"
#include "flags.h"
#include "cpp-id-data.h"
#include "cppbuiltin.h"
#include "target.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 (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__");
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_low_cst (TYPE_SIZE_UNIT (TYPE), 1))
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",
POINTER_SIZE / 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);
}
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