mailing list of musl libc

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 #define _GNU_SOURCE
#include <stdio.h>
#include "syscall.h"

int renameat2(int oldfd, const char *old, int newfd, const char *new, unsigned flags)
{
	int r = __syscall(SYS_renameat2, oldfd, old, newfd, new, flags);
#ifdef SYS_renameat
	if (r==-ENOSYS && !flags) r = __syscall(SYS_renameat, oldfd, old, newfd, new);
#endif
	return __syscall_ret(r);
}