Check string format in log_message

Move "printflike" definition to arch.h, it's used both by log.h and
os_calls.h.

common/arch.h

@@ -19,6 +19,10 @@
 #if !defined(ARCH_H)
 #define ARCH_H
 
+#if defined(HAVE_CONFIG_H)
+#include "config_ac.h"
+#endif
+
 /* you can define L_ENDIAN or B_ENDIAN and NEED_ALIGN or NO_NEED_ALIGN
    in the makefile to override */
 
@@ -125,4 +129,12 @@ typedef signed long long tsi64;
 #endif
 #endif /* DEFINED_Ts */
 
+/* format string verification */
+#if defined(HAVE_FUNC_ATTRIBUTE_FORMAT)
+#define printflike(arg_format, arg_first_check) \
+ __attribute__((__format__(__printf__, arg_format, arg_first_check)))
+#else
+#define printflike(arg_format, arg_first_check)
+#endif
+
 #endif

common/log.h

@@ -171,7 +171,7 @@ log_end(void);
  * @return
  */
 enum logReturns DEFAULT_CC
-log_message(const enum logLevels lvl, const char *msg, ...);
+log_message(const enum logLevels lvl, const char *msg, ...) printflike(2, 3);
 
 /**
  *

common/os_calls.h

@@ -21,10 +21,6 @@
 #if !defined(OS_CALLS_H)
 #define OS_CALLS_H
 
-#if defined(HAVE_CONFIG_H)
-#include "config_ac.h"
-#endif
-
 #ifndef NULL
 #define NULL 0
 #endif
@@ -45,13 +41,6 @@
 #define g_tcp_select g_sck_select
 #define g_close_wait_obj g_delete_wait_obj
 
-#if defined(HAVE_FUNC_ATTRIBUTE_FORMAT)
-#define printflike(arg_format, arg_first_check) \
- __attribute__((__format__(__printf__, arg_format, arg_first_check)))
-#else
-#define printflike(arg_format, arg_first_check)
-#endif
-
 int APP_CC      g_rm_temp_dir(void);
 int APP_CC      g_mk_temp_dir(const char* app_name);
 void APP_CC     g_init(const char* app_name);