[PATCH 10/14] FreeBSD update of __printflike, etc.

[Sebastian Huber <sebastian dot huber at embedded-brains dot de>]

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

	* libc/include/sys/cdefs.h (__printflike): New define.
	(__scanflike): Likewise.
	(__format_arg): Likewise.
	(__strfmonlike): Likewise.
	(__strftimelike): Likewise.
---
 newlib/libc/include/sys/cdefs.h |   33 +++++++++++++++++++++++++++++++++
 1 files changed, 33 insertions(+), 0 deletions(-)

diff --git a/newlib/libc/include/sys/cdefs.h b/newlib/libc/include/sys/cdefs.h
index cf343a2..72b2093 100644
--- a/newlib/libc/include/sys/cdefs.h
+++ b/newlib/libc/include/sys/cdefs.h
@@ -426,6 +426,39 @@
 	__DEQUALIFY(s *, (const volatile char *)(x) - __offsetof(s, m))
 #endif
 
+/*
+ * Compiler-dependent macros to declare that functions take printf-like
+ * or scanf-like arguments.  They are null except for versions of gcc
+ * that are known to support the features properly (old versions of gcc-2
+ * didn't permit keeping the keywords out of the application namespace).
+ */
+#if !__GNUC_PREREQ__(2, 7) && !defined(__INTEL_COMPILER)
+#define	__printflike(fmtarg, firstvararg)
+#define	__scanflike(fmtarg, firstvararg)
+#define	__format_arg(fmtarg)
+#define	__strfmonlike(fmtarg, firstvararg)
+#define	__strftimelike(fmtarg, firstvararg)
+#else
+#define	__printflike(fmtarg, firstvararg) \
+	    __attribute__((__format__ (__printf__, fmtarg, firstvararg)))
+#define	__scanflike(fmtarg, firstvararg) \
+	    __attribute__((__format__ (__scanf__, fmtarg, firstvararg)))
+#define	__format_arg(fmtarg)	__attribute__((__format_arg__ (fmtarg)))
+#define	__strfmonlike(fmtarg, firstvararg) \
+	    __attribute__((__format__ (__strfmon__, fmtarg, firstvararg)))
+#define	__strftimelike(fmtarg, firstvararg) \
+	    __attribute__((__format__ (__strftime__, fmtarg, firstvararg)))
+#endif
+
+/* Compiler-dependent macros that rely on FreeBSD-specific extensions. */
+#if defined(__FreeBSD_cc_version) && __FreeBSD_cc_version >= 300001 && \
+    defined(__GNUC__) && !defined(__INTEL_COMPILER)
+#define	__printf0like(fmtarg, firstvararg) \
+	    __attribute__((__format__ (__printf0__, fmtarg, firstvararg)))
+#else
+#define	__printf0like(fmtarg, firstvararg)
+#endif
+
 #ifndef	__DEQUALIFY
 #define	__DEQUALIFY(type, var)	((type)(uintptr_t)(const volatile void *)(var))
 #endif
-- 
1.7.7