diff options
Diffstat (limited to 'errno.h')
| -rw-r--r-- | errno.h | 10 |
1 files changed, 8 insertions, 2 deletions
@@ -1,4 +1,4 @@ -/* Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc. +/* Copyright (C) 1991, 92, 93, 94, 95, 96 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -37,8 +37,14 @@ __BEGIN_DECLS #undef __need_Emath #ifdef _ERRNO_H -/* Declare the `errno' variable. */ +/* Declare the `errno' variable, unless it's defined as a macro by + errnos.h. This is the case in GNU, where it is a per-thread variable. + This redeclaration using the macro still works, but it will be a + function declaration without a prototype and may trigger a + -Wstrict-prototypes warning. */ +#ifndef errno extern int errno; +#endif #ifdef __USE_GNU /* The full and simple forms of the name with which the program was |