[U-Boot] [PATCH] GCC4.6: Convert various empty macros to inline functions

[Marek Vasut <marek.vasut@gmail.com>]

Fixes problems similar to the following ones:

cmd_date.c: In function ?do_date?:
cmd_date.c:50:6: warning: variable ?old_bus? set but not used
[-Wunused-but-set-variable]

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
---
 common/usb.c     |    4 ++--
 include/common.h |    4 ++--
 include/i2c.h    |    5 ++++-
 3 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/common/usb.c b/common/usb.c
index a401c09..a5f9e9f 100644
--- a/common/usb.c
+++ b/common/usb.c
@@ -63,7 +63,7 @@
 #ifdef	USB_DEBUG
 #define	USB_PRINTF(fmt, args...)	printf(fmt , ##args)
 #else
-#define USB_PRINTF(fmt, args...)
+static inline void USB_PRINTF(const char *fmt, ...) {}
 #endif
 
 #define USB_BUFSIZ	512
@@ -970,7 +970,7 @@ void usb_scan_devices(void)
 #ifdef	USB_HUB_DEBUG
 #define	USB_HUB_PRINTF(fmt, args...)	printf(fmt , ##args)
 #else
-#define USB_HUB_PRINTF(fmt, args...)
+static inline void USB_HUB_PRINTF(const char *fmt, ...) {}
 #endif
 
 
diff --git a/include/common.h b/include/common.h
index d244bd4..aeb2d84 100644
--- a/include/common.h
+++ b/include/common.h
@@ -120,8 +120,8 @@ typedef volatile unsigned char	vu_char;
 #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...)
+static inline void debug(const char *fmt, ...) {}
+static inline void debugX(int level, const char *fmt, ...) {}
 #endif	/* DEBUG */
 
 #ifdef DEBUG
diff --git a/include/i2c.h b/include/i2c.h
index 8ceb4c8..323150d 100644
--- a/include/i2c.h
+++ b/include/i2c.h
@@ -55,7 +55,10 @@
 #else
 #define CONFIG_SYS_MAX_I2C_BUS		1
 #define I2C_GET_BUS()		0
-#define I2C_SET_BUS(a)
+static inline int I2C_SET_BUS(unsigned int bus)
+{
+	return 0;
+}
 #endif
 
 /* define the I2C bus number for RTC and DTT if not already done */
-- 
1.7.5.4