tsystem.h File Reference

#include <stddef.h>
#include <float.h>
#include <stdarg.h>
#include <stdio.h>
#include <sys/types.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <limits.h>
#include <time.h>
#include "filenames.h"

Include dependency graph for tsystem.h:

Go to the source code of this file.

Macros
#define	HAVE_DECL_GETOPT   1
#define	_GNU_SOURCE   1
#define	NULL   0
#define	alloca(x)
#define	gcc_assert(EXPR)
#define	gcc_unreachable()
#define	CONST_CAST2(TOTYPE, FROMTYPE, X)
#define	CONST_CAST(TYPE, X)

Variables
int	errno

Macro Definition Documentation

_GNU_SOURCE

#define _GNU_SOURCE   1

We want everything from the glibc headers.   

alloca

#define alloca

(

x

)

Value:

__builtin_alloca(x)

GCC always provides __builtin_alloca(x).   

Referenced by add_mnemonic_string(), check_bb_profile(), create_coalesce_list_for_region(), default_function_rodata_section(), default_internal_label(), do_option_spec(), do_spec_1(), dump_bb_info(), operands_scanner::get_asm_stmt_operands(), get_file_function_name(), get_named_text_section(), gimple_regimplify_operands(), gimplify_asm_expr(), is_directory(), mergeable_constant_section(), mergeable_string_section(), mpz_get_double_int(), omp_construct_traits_match(), used_arg_t::operator()(), prefix_name(), print_loop(), print_loops_bb(), rtx_writer::print_rtl_single_with_indent(), process_command(), rtl_dump_bb(), driver::set_up_specs(), set_user_assembler_name(), sjlj_fix_up_crossing_landing_pad(), translate_name(), and walk_gimple_asm().

CONST_CAST

#define CONST_CAST	(		TYPE,
			X )

Value:

CONST_CAST2 (TYPE, const TYPE, (X))

CONST_CAST2

#define CONST_CAST2	(		TOTYPE,
			FROMTYPE,
			X )

Value:

((__extension__(union {FROMTYPE _q; TOTYPE _nq;})(X))._nq)

gcc_assert

#define gcc_assert

(

EXPR

)

Value:

((void)(0 && (EXPR)))

Include EXPR, so that unused variable warnings do not occur.   

gcc_unreachable

#define gcc_unreachable

(

)

Value:

(abort ())

Use gcc_unreachable() to mark unreachable locations (like an
unreachable default case of a switch.  Do not use gcc_assert(0).   

HAVE_DECL_GETOPT

#define HAVE_DECL_GETOPT   1

Get common system includes and various definitions and declarations
   based on target macros.
   Copyright (C) 2000-2025 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.

Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.

You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
<http://www.gnu.org/licenses/>.   

System headers (e.g. stdio.h, stdlib.h, unistd.h) sometimes
indirectly include getopt.h.  Our -I flags will cause gcc's gnu
getopt.h to be included, not the platform's copy.  In the default
case, gnu getopt.h will provide us with a no-argument prototype
which will generate -Wstrict-prototypes warnings.  None of the
target files actually use getopt, so it is safe to tell gnu
getopt.h we never need this prototype.   

NULL

#define NULL   0

If these system headers do not exist, fixincludes must create them.   

GCC supplies this header.   

If these system headers do not exist, fixincludes must create them.   

Define a generic NULL if one hasn't already been defined.   

Variable Documentation

errno

int errno

extern

GCC supplies these headers.   

We disable this when inhibit_libc, so that gcc can still be built without
needing header files first.   

??? This is not a good solution, since prototypes may be required in
some cases for correct code.   

GCC supplies this header.   

All systems have this header.   

All systems have this header.   

All systems have this header.   

Referenced by collect_execute(), decode_reg_name_and_count(), diagnostic_cb(), diagnostic_set_info_translated(), dosum(), dot_dominance_tree(), dump_context::dump_printf_va(), execute(), gcov_open(), gcov_output_files(), jobserver_info::get_token(), identifier_to_locale(), integral_argument(), lockfile::lock_read(), lockfile::lock_write(), main(), libgdiagnostics_path_event::make_desc(), maybe_unlink(), oacc_parse_default_dims(), open_outfile(), open_outfile(), opt_problem::opt_problem(), pp_printf(), pp_printf_n(), pp_verbatim(), graphviz_out::print(), graphviz_out::println(), read_input_list(), read_state(), remove_duplicates(), run_attempt(), scan_prog_file(), set_asan_shadow_offset(), set_source_date_epoch_envvar(), verbatim(), write_automata(), state_writer::write_state, write_state_trailer(), and json_file_output_format::~json_file_output_format().