misc/56206: src/sys/sys/cdefs.h uses PreProcessor variables that aren't defined, causing noisy warnings.

[Larry Rosenman]

>Number:         56206
>Category:       misc
>Synopsis:       src/sys/sys/cdefs.h uses PreProcessor variables that aren't defined, causing noisy warnings.
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          change-request
>Submitter-Id:   current-users
>Arrival-Date:   Sat Aug 30 12:20:14 PDT 2003
>Closed-Date:
>Last-Modified:
>Originator:     Larry Rosenman
>Release:        FreeBSD 5.1-CURRENT i386
>Organization:
LERCTR Consulting
>Environment:
System: FreeBSD lerlaptop.lerctr.org 5.1-CURRENT FreeBSD 5.1-CURRENT #42: Fri Aug 29 19:27:56 CDT 2003 ler at lerlaptop.lerctr.org:/usr/obj/usr/src/sys/LERLAPTOP i386


	
>Description:
the /usr/include/sys/cdefs.h file uses __STD_C__ and _POSIX_C_SOURCE variables
without them being defined.  This causes noise that is unneeded. 

The following patch shuts it up, and is functionally equivalent. 

Can we get this applied? 
>How-To-Repeat:
compile KDE and see all the warnings. 
>Fix:

--- /usr/src/sys/sys/cdefs.h.orig	Sun Jul 27 08:03:46 2003
+++ /usr/src/sys/sys/cdefs.h	Sat Aug 30 14:11:09 2003
@@ -171,7 +171,7 @@
  * software that is unaware of C99 keywords.
  */
 #if !(__GNUC__ == 2 && __GNUC_MINOR__ == 95)
-#if __STDC_VERSION__ < 199901
+#if defined(__STDC_VERSION__) && __STDC_VERSION__ < 199901
 #define	__restrict
 #else
 #define	__restrict	restrict
@@ -323,13 +323,13 @@
  */
 
 /* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */
-#if _POSIX_C_SOURCE == 1
+#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 1
 #undef _POSIX_C_SOURCE		/* Probably illegal, but beyond caring now. */
 #define	_POSIX_C_SOURCE		199009
 #endif
 
 /* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */
-#if _POSIX_C_SOURCE == 2
+#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 2
 #undef _POSIX_C_SOURCE
 #define	_POSIX_C_SOURCE		199209
 #endif

>Release-Note:
>Audit-Trail:
>Unformatted: