clang: Fix build warnings for 3.4

src/lxc/log.h

@@ -44,6 +44,13 @@
 #define LXC_LOG_PREFIX_SIZE	32
 #define LXC_LOG_BUFFER_SIZE	512
 
+/* This attribute is required to silence clang warnings */
+#if defined(__GNUC__)
+#define ATTR_UNUSED __attribute__ ((unused))
+#else
+#define ATTR_UNUSED
+#endif
+
 /* predefined priorities. */
 enum lxc_loglevel {
 	LXC_LOG_PRIORITY_TRACE,
@@ -180,10 +187,10 @@ __lxc_log(const struct lxc_log_category* category,
  */
 #define lxc_log_priority_define(acategory, PRIORITY)			\
 									\
-static inline void LXC_##PRIORITY(struct lxc_log_locinfo *,		\
+ATTR_UNUSED static inline void LXC_##PRIORITY(struct lxc_log_locinfo *,		\
 	const char *, ...) __attribute__ ((format (printf, 2, 3)));	\
 									\
-static inline void LXC_##PRIORITY(struct lxc_log_locinfo* locinfo,	\
+ATTR_UNUSED static inline void LXC_##PRIORITY(struct lxc_log_locinfo* locinfo,	\
 				  const char* format, ...)		\
 {									\
 	if (lxc_log_priority_is_enabled(acategory, 			\

src/lxc/lxc_autostart.c

@@ -220,7 +220,7 @@ int main(int argc, char *argv[])
 	struct lxc_list *it, *next;
 	char *const default_start_args[] = {
 		"/sbin/init",
-		'\0',
+		NULL,
 	};
 
 	if (lxc_arguments_parse(&my_args, argc, argv))

src/lxc/lxc_start.c

@@ -207,7 +207,7 @@ int main(int argc, char *argv[])
 	char *rcfile = NULL;
 	char *const default_args[] = {
 		"/sbin/init",
-		'\0',
+		NULL,
 	};
 	struct lxc_container *c;
 

src/lxc/lxccontainer.c

@@ -555,7 +555,7 @@ static bool lxcapi_start(struct lxc_container *c, int useinit, char * const argv
 	FILE *pid_fp = NULL;
 	char *default_args[] = {
 		"/sbin/init",
-		'\0',
+		NULL,
 	};
 
 	/* container exists */