[PATCH 05/14] FreeBSD update of __P, etc.

[Sebastian Huber]

newlib/ChangeLog
2013-04-17  Sebastian Huber <sebastian.huber@embedded-brains.de>

	* libc/include/sys/cdefs.h (__P): Use definition of latest
	FreeBSD source.
	(__const): Likewise.
	(__signed): Likewise.
	(__volatile): Likewise.
	(__CONCAT1): Likewise.
	(__CONCAT): Likewise.
	(__STRING): Likewise.
	(__XSTRING): Likewise.
---
 newlib/libc/include/sys/cdefs.h |   82 +++++++++++++++++++++++++++------------
 1 files changed, 57 insertions(+), 25 deletions(-)

diff --git a/newlib/libc/include/sys/cdefs.h b/newlib/libc/include/sys/cdefs.h
index b4bc272..1cae5ec 100644
--- a/newlib/libc/include/sys/cdefs.h
+++ b/newlib/libc/include/sys/cdefs.h
@@ -49,36 +49,11 @@
 #include <stdint.h>
 
 #define __FBSDID(x) /* nothing */
-/*
- * Note: the goal here is not compatibility to K&R C. Since we know that we
- * have GCC which understands ANSI C perfectly well, we make use of this.
- */
 
-#define __P(args)	args
 #define __PMT(args)	args
-#define __const		const
-#define __signed	signed
-#define __volatile	volatile
 #define __DOTS    	, ...
 #define __THROW
 
-/*
- * 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 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.
- */
-#define __CONCAT1(x,y)  x ## y
-#define __CONCAT(x,y)   __CONCAT1(x,y)
-#define __STRING(x)     #x              /* stringify without expanding x */
-#define __XSTRING(x)    __STRING(x)     /* expand x, then stringify */
-
 #ifdef __GNUC__
 # define __ASMNAME(cname)  __XSTRING (__USER_LABEL_PREFIX__) cname
 #endif
@@ -172,6 +147,63 @@
 #endif /* __GNUC__ || __INTEL_COMPILER */
 
 /*
+ * 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 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.
+ */
+#if defined(__STDC__) || defined(__cplusplus)
+#define	__P(protos)	protos		/* full-blown ANSI C */
+#define	__CONCAT1(x,y)	x ## y
+#define	__CONCAT(x,y)	__CONCAT1(x,y)
+#define	__STRING(x)	#x		/* stringify without expanding x */
+#define	__XSTRING(x)	__STRING(x)	/* expand x, then stringify */
+
+#define	__const		const		/* define reserved names to standard */
+#define	__signed	signed
+#define	__volatile	volatile
+#if defined(__cplusplus)
+#define	__inline	inline		/* convert to C++ keyword */
+#else
+#if !(defined(__CC_SUPPORTS___INLINE))
+#define	__inline			/* delete GCC keyword */
+#endif /* ! __CC_SUPPORTS___INLINE */
+#endif /* !__cplusplus */
+
+#else	/* !(__STDC__ || __cplusplus) */
+#define	__P(protos)	()		/* traditional C preprocessor */
+#define	__CONCAT(x,y)	x/**/y
+#define	__STRING(x)	"x"
+
+#if !defined(__CC_SUPPORTS___INLINE)
+#define	__const				/* delete pseudo-ANSI C keywords */
+#define	__inline
+#define	__signed
+#define	__volatile
+/*
+ * In non-ANSI C environments, new programs will want ANSI-only C keywords
+ * deleted from the program and old programs will want them left alone.
+ * When using a compiler other than gcc, programs using the ANSI C keywords
+ * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS.
+ * When using "gcc -traditional", we assume that this is the intent; if
+ * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone.
+ */
+#ifndef	NO_ANSI_KEYWORDS
+#define	const				/* delete ANSI C keywords */
+#define	inline
+#define	signed
+#define	volatile
+#endif	/* !NO_ANSI_KEYWORDS */
+#endif	/* !__CC_SUPPORTS___INLINE */
+#endif	/* !(__STDC__ || __cplusplus) */
+
+/*
  * Given the pointer x to the member m of the struct s, return
  * a pointer to the containing structure.  When using GCC, we first
  * assign pointer x to a local variable, to check that its type is
-- 
1.7.7