[U-Boot] [PATCH 01/39] DEBUG: Fix debug macros

[Marek Vasut]

The current implementation of debug doesn't play well with GCC4.6.
This implementation also fixes GCC4.6 complaints about unused variables
while maintaining code size.

Signed-off-by: Mike Frysinger <vapier at gentoo.org>
Signed-off-by: Marek Vasut <marek.vasut at gmail.com>
Cc: Wolfgang Denk <wd at denx.de>
Cc: Simon Glass <sjg at chromium.org>
---
 include/common.h |   20 ++++++++++++--------
 1 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/include/common.h b/include/common.h
index eb19a44..c3b23551 100644
--- a/include/common.h
+++ b/include/common.h
@@ -116,20 +116,24 @@ typedef volatile unsigned char	vu_char;
 #include <flash.h>
 #include <image.h>
 
-#ifdef	DEBUG
-#define debug(fmt,args...)	printf (fmt ,##args)
-#define debugX(level,fmt,args...) if (DEBUG>=level) printf(fmt,##args);
-#else
-#define debug(fmt,args...)
-#define debugX(level,fmt,args...)
-#endif	/* DEBUG */
-
 #ifdef DEBUG
 # define _DEBUG 1
 #else
 # define _DEBUG 0
 #endif
 
+#define debug_cond(cond, fmt, args...)		\
+	do {					\
+		if (cond)			\
+			printf(fmt, ##args);	\
+	} while (0)
+
+#define debug(fmt, args...)			\
+	debug_cond(_DEBUG, fmt, ##args)
+
+#define debugX(level, fmt, args...)		\
+	debug_cond((_DEBUG && DEBUG >= (level)), fmt, ##args)
+
 /*
  * An assertion is run-time check done in debug mode only. If DEBUG is not
  * defined then it is skipped. If DEBUG is defined and the assertion fails,
-- 
1.7.6.3