Write debug_printf to avoid warnings and fix latency/cfd script

Signed-off-by: Rafael Ravedutti <rafaelravedutti@gmail.com>

common/includes/util.h

@@ -19,11 +19,7 @@
 #   define ABS(a) ((a) >= 0 ? (a) : -(a))
 #endif
 
-#ifdef DEBUG
-#   define DEBUG_MESSAGE   printf
-#else
-#   define DEBUG_MESSAGE
-#endif
+#define DEBUG_MESSAGE debug_printf
 
 #ifndef MAXLINE
 #   define MAXLINE 4096
@@ -45,5 +41,6 @@ extern int str2ff(const char *string);
 extern const char* ff2str(int ff);
 extern int get_num_threads();
 extern void readline(char *line, FILE *fp);
+extern void debug_printf(const char *format, ...);
 
 #endif

common/util.c

@@ -5,6 +5,7 @@
  * license that can be found in the LICENSE file.
  */
 #include <errno.h>
+#include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -91,3 +92,14 @@ void readline(char *line, FILE *fp) {
         }
     }
 }
+
+void debug_printf(const char *format, ...) {
+    #ifdef DEBUG
+    va_list arg;
+    int ret;
+
+    va_start(arg, format);
+    if((vfprintf(stdout, format, arg)) < 0) { perror("debug_printf()"); }
+    va_end(arg);
+    #endif
+}