Add a special attribute to printf-like funcs

Enables extra compile-time checks

CL: none

PUBLISHED_FROM=9f7d658fbda5c721cf40293bf29967bb056d0437

src/common/cs_dbg.h

@@ -115,11 +115,7 @@ void cs_log_set_file(FILE *file);
  * Prints log to the current log file, appends "\n" in the end and flushes the
  * stream.
  */
-void cs_log_printf(const char *fmt, ...)
-#ifdef __GNUC__
-    __attribute__((format(printf, 1, 2)))
-#endif
-    ;
+void cs_log_printf(const char *fmt, ...) PRINTF_LIKE(1, 2);
 
 /*
  * Format and print message `x` with the given level `l`. Example:

src/common/platform.h

@@ -92,8 +92,18 @@
 
 /* Common stuff */
 
+#if !defined(PRINTF_LIKE)
+#if defined(__GNUC__) || defined(__clang__) || defined(__TI_COMPILER_VERSION__)
+#define PRINTF_LIKE(f, a) __attribute__((format(printf, f, a)))
+#else
+#define PRINTF_LIKE(f, a)
+#endif
+#endif
+
 #if !defined(WEAK)
-#if (defined(__GNUC__) || defined(__TI_COMPILER_VERSION__)) && !defined(_WIN32)
+#if (defined(__GNUC__) || defined(__clang__) || \
+     defined(__TI_COMPILER_VERSION__)) &&       \
+    !defined(_WIN32)
 #define WEAK __attribute__((weak))
 #else
 #define WEAK