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tools/nolibc: add stdarg.h header

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This allows nolic to work with `-nostdinc` avoiding any reliance on
system headers.

The implementation has been lifted from musl libc 1.2.4.
There is already an implementation of stdarg.h in include/linux/stdarg.h
but that is GPL licensed and therefore not suitable for nolibc.

The used compiler builtins have been validated to be at least available
since GCC 4.1.2 and clang 3.0.0.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Willy Tarreau <w@1wt.eu>
This commit is contained in:
Thomas Weißschuh
2023-08-30 17:07:12 +02:00
parent 921992229b
commit b56a9492d0
5 changed files with 21 additions and 5 deletions
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2
tools/include/nolibc/sys.h
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@@ -7,7 +7,6 @@
#ifndef _NOLIBC_SYS_H
#define _NOLIBC_SYS_H
#include <stdarg.h>
#include "std.h"
/* system includes */
@@ -25,6 +24,7 @@
#include "arch.h"
#include "errno.h"
#include "stdarg.h"
#include "types.h"