Some polishing of SCSI log time measurement

cdrskin/cdrskin_timestamp.h

@@ -1 +1 @@
-#define Cdrskin_timestamP "2013.06.09.154237"
+#define Cdrskin_timestamP "2013.06.09.163052"

libburn/spc.c

@@ -1676,7 +1676,7 @@ int scsi_log_reply(unsigned char *opcode, int data_dir, unsigned char *data,
 			                        dxfer_len, fp, 0);
 		}
 		if (!(flag & 2))
-			fprintf(fp, "   %6.f us     [ %.f ]\n",
+			fprintf(fp, " %8.f us     [ %.f ]\n",
 			        duration * 1.0e6,
 			        (burn_get_time(0) - lib_start_time) * 1.0e6);
 		if (burn_sg_log_scsi & 4)

libburn/util.c

@@ -353,14 +353,22 @@ double burn_get_time(int flag)
 	struct timeval tv;
 
 #ifdef Libburn_use_clock_gettime_monotoniC
+#ifdef _POSIX_TIMERS
 #ifdef _POSIX_MONOTONIC_CLOCK
 
+	/* Enable by
+	     export CFLAGS=-DLibburn_use_clock_gettime_monotoniC
+	     export LIBS=-lrt
+	     ./configure ... && make clean && make
+	*/
+
 	struct timespec tp;
 	ret = clock_gettime(CLOCK_MONOTONIC, &tp);
 	if (ret == 0)
 		return ((double) tp.tv_sec) + ((double) tp.tv_nsec) * 1.0e-9;
 
 #endif /* _POSIX_MONOTONIC_CLOCK */
+#endif /* _POSIX_TIMERS */
 #endif /* Xorriso_use_clock_gettime_monotoniC */
 
 	ret = gettimeofday(&tv, NULL);