Fix missing field initialisers warnings.

bitforce.c

@@ -192,7 +192,7 @@ static bool bitforce_thread_prepare(struct thr_info *thr)
 	return true;
 }
 
-static uint64_t bitforce_scanhash(struct thr_info *thr, struct work *work, uint64_t max_nonce)
+static uint64_t bitforce_scanhash(struct thr_info *thr, struct work *work, uint64_t __maybe_unused max_nonce)
 {
 	struct cgpu_info *bitforce = thr->cgpu;
 	int fdDev = bitforce->device_fd;

cgminer.c

@@ -1701,7 +1701,7 @@ void kill_work(void)
 
 void quit(int status, const char *format, ...);
 
-static void sighandler(int sig)
+static void sighandler(int __maybe_unused sig)
 {
 	/* Restore signal handlers so we can still quit if kill_work fails */
 	sigaction(SIGTERM, &termhandler, NULL);
@@ -3073,7 +3073,7 @@ static bool get_work(struct work *work, bool requested, struct thr_info *thr,
 		     const int thr_id)
 {
 	bool newreq = false, ret = false;
-	struct timespec abstime = {};
+	struct timespec abstime = {0, 0};
 	struct timeval now;
 	struct work *work_heap;
 	struct pool *pool;

logging.c

@@ -25,7 +25,7 @@ void vapplog(int prio, const char *fmt, va_list ap)
 	else if (opt_log_output || prio <= LOG_NOTICE) {
 		char *f;
 		int len;
-		struct timeval tv = { };
+		struct timeval tv = {0, 0};
 		struct tm *tm;
 
 		gettimeofday(&tv, NULL);
@@ -79,7 +79,7 @@ void applog(int prio, const char *fmt, ...)
  * generic log function used by priority specific ones
  * equals vapplog() without additional priority checks
  */
-static void log_generic(int prio, const char *fmt, va_list ap)
+static void __maybe_unused log_generic(int prio, const char *fmt, va_list ap)
 {
 	extern bool use_curses;
 #ifdef HAVE_SYSLOG_H
@@ -92,7 +92,7 @@ static void log_generic(int prio, const char *fmt, va_list ap)
 	else {
 		char *f;
 		int len;
-		struct timeval tv = { };
+		struct timeval tv = {0, 0};
 		struct tm *tm;
 
 		gettimeofday(&tv, NULL);

util.c

@@ -254,14 +254,14 @@ json_t *json_rpc_call(CURL *curl, const char *url,
 {
 	json_t *val, *err_val, *res_val;
 	int rc;
-	struct data_buffer all_data = { };
+	struct data_buffer all_data = {NULL, 0};
 	struct upload_buffer upload_data;
-	json_error_t err = { };
+	json_error_t err = {0, 0, 0, "", ""};
 	struct curl_slist *headers = NULL;
 	char len_hdr[64], user_agent_hdr[128];
 	char curl_err_str[CURL_ERROR_SIZE];
 	long timeout = longpoll ? (60 * 60) : 60;
-	struct header_info hi = { };
+	struct header_info hi = {NULL, false, NULL};
 	bool probing = false;
 
 	/* it is assumed that 'curl' is freshly [re]initialized at this pt */