BUILD: corrected system_clock duration for clang

In GCC STL system_clock the duration is in nanoseconds, but in clang it
is in microseconds.

Also, the package version has been changed to 1.1.2 and the library
version to 1.1.1.

VERSION

@@ -1,2 +1,2 @@
-Package Version: 1.1.1
-Library Version: 1:0:1
+Package Version: 1.1.2
+Library Version: 1:1:1

include/util.h

@@ -30,6 +30,7 @@ extern otc_ext_malloc_t otc_ext_malloc;
 extern otc_ext_free_t   otc_ext_free;
 
 
+std::chrono::microseconds timespec_to_duration_us(const struct timespec *ts);
 std::chrono::nanoseconds  timespec_to_duration(const struct timespec *ts);
 const char               *otc_strerror(int errnum);
 

src/span.cpp

@@ -64,7 +64,11 @@ static void ot_span_finish_with_options(struct otc_span *span, const struct otc_
 				struct opentracing::LogRecord record;
 
 				if (options->log_records[i].timestamp.value.tv_sec > 0) {
+#ifdef __clang__
+					auto dt = timespec_to_duration_us(&(options->log_records[i].timestamp.value));
+#else
 					auto dt = timespec_to_duration(&(options->log_records[i].timestamp.value));
+#endif
 
 					record.timestamp = std::chrono::time_point<std::chrono::system_clock>(dt);
 				}

src/tracer.cpp

@@ -159,7 +159,11 @@ static struct otc_span *ot_tracer_start_span_with_options(struct otc_tracer *tra
 		}
 
 		if (options->start_time_system.value.tv_sec > 0) {
+#ifdef __clang__
+			auto dt = timespec_to_duration_us(&(options->start_time_system.value));
+#else
 			auto dt = timespec_to_duration(&(options->start_time_system.value));
+#endif
 
 			span_options.start_system_timestamp = std::chrono::time_point<std::chrono::system_clock>(dt);
 		}

src/util.cpp

@@ -20,6 +20,27 @@ otc_ext_malloc_t otc_ext_malloc = OT_IFDEF_DBG(otc_dbg_malloc, malloc);
 otc_ext_free_t   otc_ext_free   = OT_IFDEF_DBG(otc_dbg_free,   free);
 
 
+/***
+ * NAME
+ *   timespec_to_duration_us -
+ *
+ * ARGUMENTS
+ *   ts -
+ *
+ * DESCRIPTION
+ *   -
+ *
+ * RETURN VALUE
+ *   -
+ */
+std::chrono::microseconds timespec_to_duration_us(const struct timespec *ts)
+{
+	auto duration = std::chrono::seconds{ts->tv_sec} + std::chrono::microseconds{ts->tv_nsec / 1000};
+
+	return std::chrono::duration_cast<std::chrono::microseconds>(duration);
+}
+
+
 /***
  * NAME
  *   timespec_to_duration -