\file * * \brief Syscalls for SAM0 GCC. * * Copyright c 2012

$NetBSD: patch-at,v 1.6 2009/12/18 01:09:23 abs Exp $ --- src

But this definition is unacceptable in a multithreaded environment, because its use can result in nondeterministic results. The problem is that two or more threads can encounter errors, all causing the same errno to be set. ENOENT No such file or directory (POSIX.1-2001). Typically, this error results when a specified pathname does not exist, or one of the components in the directory prefix of a pathname does not exist, or the specified pathname is a dangling symbolic link.

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After that it  extern int errno or #define errno definition is used to hold implementation-defined error codes from standard library routines; All error codes are positive integers  29, # define errno __libc_errno. 30, # else. 31, # define errno errno /* For #ifndef errno tests. */.

#define operror(str) eprintf("%s: %s", str, strerror(errno)) #define oputa(aline) format_printf(1, 2); extern void VDECL(tfprintf,(TFILE *file, CONST char *fmt, .

TinyFugue - programmable mud client * Copyright C 1993

(More on this below.) In POSIX.1, errno is defined as an external global variable. But this definition is unacceptable in a multithreaded environment, because its use can result in nondeterministic results.

usrLib.h - header for user interface subroutines */ /* Copyright

It defines macros for reporting and retrieving error conditions using the symbol errno (short for "error number"). errno acts like an integer variable.

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extern int *__errno_location (void);. #define errno (*__errno_location()). #endif /* errno */.

It will not work with modern versions of the C library. However, on (very) old UNIX systems, there may be no and the declaration is needed. SEE ALSO¶ errno(1), err(3), error(3), perror(3), strerror(3) Sourceware.org's Newlib mirror with clang support for ARM baremetal - eblot/newlib 2020-01-02 · The worst part of errno is that the specification requires it to be a macro, and so you can only really use it from C source code.
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pthread_cwd.c - Apple Open Source

ARC_STRACE_RETURN(-1);.

#ifndef MULTICAST_H #define MULTICAST_H /* include files

Declaration Following is the declaration for errno macro. extern int errno; (without including ) is unsupported. It is unspecified whether errno is a macro or an identifier declared with external linkage. If a macro definition is suppressed in order to access the actual object, or a program defines an identifier with the name errno, the behavior is undefined. extern tells the compiler that this data is defined somewhere and will be connected with the linker.

A warning in the shim can be controlled with CONFIG_COMPAT_INCLUDES. Description.