diff --git a/src/common_define.h b/src/common_define.h
index 7e49161..afecb7e 100644
--- a/src/common_define.h
+++ b/src/common_define.h
@@ -200,6 +200,12 @@ typedef void* (*MallocFunc)(size_t size);
 
 #endif
 
+#ifdef __GNUC__
+  #define __gcc_attribute__ __attribute__
+#else
+  #define __gcc_attribute__(x)
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/logger.h b/src/logger.h
index 6f7db27..ae7dafb 100644
--- a/src/logger.h
+++ b/src/logger.h
@@ -282,7 +282,7 @@ void log_destroy_ex(LogContext *pContext);
  *  return: none
 */
 void log_it_ex(LogContext *pContext, const int priority, \
-		const char *format, ...);
+		const char *format, ...) __gcc_attribute__ ((format (printf, 3, 4)));
 
 /** log to file
  *  parameters:
@@ -347,16 +347,32 @@ const char *log_get_level_caption_ex(LogContext *pContext);
 
 #define log_get_level_caption() log_get_level_caption_ex(&g_log_context)
 
-void logEmergEx(LogContext *pContext, const char *format, ...);
-void logCritEx(LogContext *pContext, const char *format, ...);
-void logAlertEx(LogContext *pContext, const char *format, ...);
-void logErrorEx(LogContext *pContext, const char *format, ...);
-void logWarningEx(LogContext *pContext, const char *format, ...);
-void logNoticeEx(LogContext *pContext, const char *format, ...);
-void logInfoEx(LogContext *pContext, const char *format, ...);
-void logDebugEx(LogContext *pContext, const char *format, ...);
-void logAccess(LogContext *pContext, struct timeval *tvStart, \
-		const char *format, ...);
+void logEmergEx(LogContext *pContext, const char *format, ...)
+    __gcc_attribute__ ((format (printf, 2, 3)));
+
+void logCritEx(LogContext *pContext, const char *format, ...)
+    __gcc_attribute__ ((format (printf, 2, 3)));
+
+void logAlertEx(LogContext *pContext, const char *format, ...)
+    __gcc_attribute__ ((format (printf, 2, 3)));
+
+void logErrorEx(LogContext *pContext, const char *format, ...)
+    __gcc_attribute__ ((format (printf, 2, 3)));
+
+void logWarningEx(LogContext *pContext, const char *format, ...)
+    __gcc_attribute__ ((format (printf, 2, 3)));
+
+void logNoticeEx(LogContext *pContext, const char *format, ...)
+    __gcc_attribute__ ((format (printf, 2, 3)));
+
+void logInfoEx(LogContext *pContext, const char *format, ...)
+    __gcc_attribute__ ((format (printf, 2, 3)));
+
+void logDebugEx(LogContext *pContext, const char *format, ...)
+    __gcc_attribute__ ((format (printf, 2, 3)));
+
+void logAccess(LogContext *pContext, struct timeval *tvStart,
+        const char *format, ...) __gcc_attribute__ ((format (printf, 3, 4)));
 
 //#define LOG_FORMAT_CHECK
 
@@ -374,14 +390,29 @@ void logAccess(LogContext *pContext, struct timeval *tvStart, \
 #else
 
 /* following functions use global log context: g_log_context */
-void logEmerg(const char *format, ...);
-void logCrit(const char *format, ...);
-void logAlert(const char *format, ...);
-void logError(const char *format, ...);
-void logWarning(const char *format, ...);
-void logNotice(const char *format, ...);
-void logInfo(const char *format, ...);
-void logDebug(const char *format, ...);
+void logEmerg(const char *format, ...)
+    __gcc_attribute__ ((format (printf, 1, 2)));
+
+void logCrit(const char *format, ...)
+    __gcc_attribute__ ((format (printf, 1, 2)));
+
+void logAlert(const char *format, ...)
+    __gcc_attribute__ ((format (printf, 1, 2)));
+
+void logError(const char *format, ...)
+    __gcc_attribute__ ((format (printf, 1, 2)));
+
+void logWarning(const char *format, ...)
+    __gcc_attribute__ ((format (printf, 1, 2)));
+
+void logNotice(const char *format, ...)
+    __gcc_attribute__ ((format (printf, 1, 2)));
+
+void logInfo(const char *format, ...)
+    __gcc_attribute__ ((format (printf, 1, 2)));
+
+void logDebug(const char *format, ...)
+    __gcc_attribute__ ((format (printf, 1, 2)));
 
 #endif
 
@@ -390,4 +421,3 @@ void logDebug(const char *format, ...);
 #endif
 
 #endif
-