Want a C version of bits/stdc++.h? Now you have it.

00_README.md

bits/stdc.h

People worry about the lack of an everything include file for stdc like libstdc++ had for C++. Worry no more! Now you can also mindlessly use one pch for C!

Honestly, just std C headers is no where near big (and slow) enough to make people want to use pch. At least we should drag POSIX in.

LOICENSE

This stuff is GPL 3+ with the GCC Runtime Library Exception 3.1. What does it mean? It means you do not need to worry about it turning your program GPLv3 as well, as long as you use this file as a "library". This is the same license terms used for libstdc++ and it did not making your code GPL, did it now?

See https://www.gnu.org/licenses/gcc-exception-3.1.en.html.

How it's made

• Start with bits/stdc++.h
• Keep only the parts starting with <c.
• Replace <c([^>]+)> with <$1.h>.
• Fix up version detection.
• Fix up comments for C89 compat.

01_stdc.h

/**
 * @file stdc.h
 * an implementation file for a precompiled header.
 * 
 * You may want to define _POSIX_SOURCE, _GNU_SOURCE, or _BSD_SOURCE
 * before you include this file.
 */
/*
 * SPDX-FileCopyrightText: 2003-2023 Free Software Foundation, Inc.
 * SPDX-FileCopyrightText: 2023 Mingye Wang (Artoria2e5)
 * SPDX-License-Identifier: GPL-3.0-or-later WITH GCC-exception-3.1
 * This file is a standalone header.  This header file 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.

 * This library 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/>. */

/* C: Freestanding */
#ifndef _BITS_STDC_H
#define _BITS_STDC_H

#include <assert.h>
#include <ctype.h>
#include <float.h>
#include <limits.h>
#include <setjmp.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdlib.h>

#if __STDC_VERSION__ >= 199409L
#include <iso646.h>
#endif /* C95 */

#if __STDC_VERSION__ >= 199901L
#include <stdint.h>
#endif /* C99 */

/* C: Hosted */
#if __STDC_HOSTED__
#include <errno.h>
#include <locale.h>
#include <math.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <time.h>

#if defined __has_include && __has_include(<unistd.h>)
#include <unistd.h>
#endif /* unistd (POSIX) */

#if __STDC_VERSION__ >= 199409L
#include <wchar.h>
#include <wctype.h>
#endif /* C95 */

#if __STDC_VERSION__ >= 199901L
#include <complex.h>
#include <fenv.h>
#include <inttypes.h>
#include <stdbool.h>
#include <stdint.h>
#include <tgmath.h>
#endif /* C99 */

#if __STDC_VERSION__ >= 201112L
#include <stdalign.h>
#include <stdatomic.h>
#include <uchar.h>
#endif /* C11 */

/* C23: Use __has_include for now */
#if defined __has_include && __has_include(<stdbit.h>)
#include <stdbit.h>
#endif /* stdbit */
#if defined __has_include && __has_include(<stdckdint.h>)
#include <stdckdint.h>
#endif /* stdckdint */

#endif /* HOSTED */
#endif /* _BITS_STD_C */