Thu Jan 18 00:32:43 1996 Roland McGrath <roland@churchy.gnu.ai.mit.edu>

[kopensolaris-gnu/glibc.git] / errno.h

diff --git a/errno.h b/errno.h
index 20bfbf2..0bcbc96 100644 (file)
--- a/errno.h
+++ b/errno.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991, 1992, 1993 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
@@ -22,16 +22,23 @@ 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 __volatile int errno;
+extern int errno;
 
 #ifdef __USE_GNU
 /* The full and simple forms of the name with which the program was
@@ -41,5 +48,6 @@ extern char *program_invocation_name, *program_invocation_short_name;
 #endif
 
 __END_DECLS
+#endif
 
 #endif /* errno.h      */