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Don't define away __attribute__() for the non-gcc and old-gcc cases.

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Using __attribute__() in non-ifdefed code is just wrong if it changes
the semantics, and there is no way to ignore __attribute__() only in
the benign cases.

Don't use __attribute__ in non-ifdefed code here.  It was a benign
case, but we already have a macro (__unused) for this case.

Expanded comment about gotchas for __CONCAT() in the non-ANSI case.
This commit is contained in:
bde 1998-06-14 13:40:01 +00:00
parent 1eddce4e7b
commit a7d3dec6df
1 changed files with 7 additions and 7 deletions
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14
sys/sys/cdefs.h
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@ -35,7 +35,7 @@
* SUCH DAMAGE.
*
* @(#)cdefs.h 8.8 (Berkeley) 1/9/95
* $Id: cdefs.h,v 1.15 1997/12/13 20:39:14 pst Exp $
* $Id: cdefs.h,v 1.16 1998/05/28 18:04:34 dt Exp $
*/
#ifndef _SYS_CDEFS_H_
@ -52,9 +52,11 @@
/*
* The __CONCAT macro is used to concatenate parts of symbol names, e.g.
* with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
* The __CONCAT macro is a bit tricky -- make sure you don't put spaces
* in between its arguments. __CONCAT can also concatenate double-quoted
* strings produced by the __STRING macro, but this only works with ANSI C.
* The __CONCAT macro is a bit tricky to use if it must work in non-ANSI
* mode -- there must be no spaces between its arguments, and for nested
* __CONCAT's, all the __CONCAT's must be at the left. __CONCAT can also
* concatenate double-quoted strings produced by the __STRING macro, but
* this only works with ANSI C.
*
* __XSTRING is like __STRING, but it expands any macros in its argument
* first. It is only available with ANSI C.
@ -118,7 +120,6 @@
#define __pure
#define __pure2
#define __unused
#define __attribute__(x)
#endif
#if __GNUC__ == 2 && __GNUC_MINOR__ < 5
#define __dead __volatile
@ -160,8 +161,7 @@
#endif
#endif
#define __IDSTRING(name,string) \
static const char name[] __attribute__((__unused__)) = string
#define __IDSTRING(name,string) static const char name[] __unused = string
#ifndef __RCSID
#define __RCSID(s) __IDSTRING(rcsid,s)