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Diffstat (limited to 'errno.h')
-rw-r--r--errno.h12
1 files changed, 10 insertions, 2 deletions
diff --git a/errno.h b/errno.h
index 08fc680..0bcbc96 100644
--- a/errno.h
+++ b/errno.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
+/* Copyright (C) 1991, 1992, 1993, 1994, 1995 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
@@ -22,14 +22,21 @@ Cambridge, MA 02139, USA. */
#ifndef _ERRNO_H
+/* The includer defined __need_Emath if he wants only the definitions
+ of EDOM and ERANGE, and not everything else. */
+#ifndef __need_Emath
#define _ERRNO_H 1
#include <features.h>
+#endif
__BEGIN_DECLS
-/* Get the error number constants. */
+/* Get the error number constants from the system-specific file.
+ This file will test __need_Emath and _ERRNO_H. */
#include <errnos.h>
+#undef __need_Emath
+#ifdef _ERRNO_H
/* Declare the `errno' variable. */
extern int errno;
@@ -41,5 +48,6 @@ extern char *program_invocation_name, *program_invocation_short_name;
#endif
__END_DECLS
+#endif
#endif /* errno.h */