diff --git a/qse/configure b/qse/configure
index 95797f79..e125b7ad 100755
--- a/qse/configure
+++ b/qse/configure
@@ -19440,7 +19440,7 @@ done
 
 OLDLIBS="$LIBS"
 LIBS="$LIBM $LIBS"
-for ac_func in powl fmodl sinl cosl tanl sinhl coshl tanhl asinl acosl atanl atan2l logl log10l expl sqrtl ceill floorl roundl
+for ac_func in powl fmodl sinl cosl tanl sinhl coshl tanhl asinl acosl atanl atan2l logl log2l log10l expl sqrtl ceill floorl roundl
 do :
   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
@@ -19452,7 +19452,7 @@ _ACEOF
 fi
 done
 
-for ac_func in pow fmod sin cos tan sinh cosh tanh asin acos atan atan2 log log10 exp sqrt ceil floor round
+for ac_func in pow fmod sin cos tan sinh cosh tanh asin acos atan atan2 log log2 log10 exp sqrt ceil floor round
 do :
   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
@@ -19464,7 +19464,7 @@ _ACEOF
 fi
 done
 
-for ac_func in powf fmodf sinf cosf tanf sinhf coshf tanhf asinf acosf atanf atan2f logf log10f expf sqrtf ceilf floorf roundf
+for ac_func in powf fmodf sinf cosf tanf sinhf coshf tanhf asinf acosf atanf atan2f logf log2f log10f expf sqrtf ceilf floorf roundf
 do :
   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
@@ -22841,7 +22841,7 @@ fi
 	then
 		OLDLIBS="$LIBS"
 		LIBS="$LIBM $LIBS"
-		for ac_func in powq fmodq sinq cosq tanq sinhq coshq tanhq asinq acosq atanq atan2q logq log10q expq sqrtq ceilq floorq roundq
+		for ac_func in powq fmodq sinq cosq tanq sinhq coshq tanhq asinq acosq atanq atan2q logq log2q log10q expq sqrtq ceilq floorq roundq
 do :
   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
diff --git a/qse/configure.ac b/qse/configure.ac
index 315d332f..2e1c50ee 100644
--- a/qse/configure.ac
+++ b/qse/configure.ac
@@ -159,9 +159,9 @@ AC_CHECK_FUNCS([snprintf _vsnprintf _vsnwprintf])
 
 OLDLIBS="$LIBS"
 LIBS="$LIBM $LIBS"
-AC_CHECK_FUNCS([powl fmodl sinl cosl tanl sinhl coshl tanhl asinl acosl atanl atan2l logl log10l expl sqrtl ceill floorl roundl])
-AC_CHECK_FUNCS([pow fmod sin cos tan sinh cosh tanh asin acos atan atan2 log log10 exp sqrt ceil floor round])
-AC_CHECK_FUNCS([powf fmodf sinf cosf tanf sinhf coshf tanhf asinf acosf atanf atan2f logf log10f expf sqrtf ceilf floorf roundf])
+AC_CHECK_FUNCS([powl fmodl sinl cosl tanl sinhl coshl tanhl asinl acosl atanl atan2l logl log2l log10l expl sqrtl ceill floorl roundl])
+AC_CHECK_FUNCS([pow fmod sin cos tan sinh cosh tanh asin acos atan atan2 log log2 log10 exp sqrt ceil floor round])
+AC_CHECK_FUNCS([powf fmodf sinf cosf tanf sinhf coshf tanhf asinf acosf atanf atan2f logf log2f log10f expf sqrtf ceilf floorf roundf])
 LIBS="$OLDLIBS"
 
 dnl OLDLIBS="$LIBS"
@@ -591,7 +591,7 @@ then
 	then
 		OLDLIBS="$LIBS"
 		LIBS="$LIBM $LIBS"
-		AC_CHECK_FUNCS([powq fmodq sinq cosq tanq sinhq coshq tanhq asinq acosq atanq atan2q logq log10q expq sqrtq ceilq floorq roundq])
+		AC_CHECK_FUNCS([powq fmodq sinq cosq tanq sinhq coshq tanhq asinq acosq atanq atan2q logq log2q log10q expq sqrtq ceilq floorq roundq])
 		AC_CHECK_FUNCS([strtoflt128])
 		LIBS="$OLDLIBS"
 	fi
diff --git a/qse/include/qse/config.h.in b/qse/include/qse/config.h.in
index ffcd5638..bc82c8f3 100644
--- a/qse/include/qse/config.h.in
+++ b/qse/include/qse/config.h.in
@@ -365,6 +365,18 @@
 /* Define to 1 if you have the `log10q' function. */
 #undef HAVE_LOG10Q
 
+/* Define to 1 if you have the `log2' function. */
+#undef HAVE_LOG2
+
+/* Define to 1 if you have the `log2f' function. */
+#undef HAVE_LOG2F
+
+/* Define to 1 if you have the `log2l' function. */
+#undef HAVE_LOG2L
+
+/* Define to 1 if you have the `log2q' function. */
+#undef HAVE_LOG2Q
+
 /* Define to 1 if you have the `logf' function. */
 #undef HAVE_LOGF
 
diff --git a/qse/include/qse/si/log.h b/qse/include/qse/si/log.h
index ec9a06db..c45309b7 100644
--- a/qse/include/qse/si/log.h
+++ b/qse/include/qse/si/log.h
@@ -39,20 +39,25 @@
 #define QSE_LOG_MSG_MAX   10204
 #define QSE_LOG_IDENT_MAX 32
 
+#define QSE_LOG_MASK_PRIORITY 0x00000FFFUL
+#define QSE_LOG_MASK_OPTION   0x000FF000UL
+#define QSE_LOG_MASK_TARGET   0xFFF00000UL
+
 /* priority */
-#define QSE_LOG_PANIC          (1UL << 0)
-#define QSE_LOG_ALERT          (1UL << 1)
-#define QSE_LOG_CRITICAL       (1UL << 2)
-#define QSE_LOG_ERROR          (1UL << 3)
-#define QSE_LOG_WARNING        (1UL << 4)
-#define QSE_LOG_NOTICE         (1UL << 5)
-#define QSE_LOG_INFO           (1UL << 6)
-#define QSE_LOG_DEBUG          (1UL << 7)
+#define QSE_LOG_PANIC           0x0000UL
+#define QSE_LOG_ALERT           0x0001UL
+#define QSE_LOG_CRITICAL        0x0002UL
+#define QSE_LOG_ERROR           0x0003UL
+#define QSE_LOG_WARNING         0x0004UL
+#define QSE_LOG_NOTICE          0x0005UL
+#define QSE_LOG_INFO            0x0006UL
+#define QSE_LOG_DEBUG           0x0007UL
 
 /* options */
-#define QSE_LOG_KEEP_FILE_OPEN  (1UL << 13)
-#define QSE_LOG_ENABLE_MASKED   (1UL << 14)
-#define QSE_LOG_INCLUDE_PID      (1UL << 15)
+#define QSE_LOG_KEEP_FILE_OPEN        (1UL << 13)
+#define QSE_LOG_ENABLE_MASKED         (1UL << 14)
+#define QSE_LOG_INCLUDE_PID           (1UL << 15)
+#define QSE_LOG_HOST_IN_REMOTE_SYSLOG (1UL << 16)
 
 /* target */
 #define QSE_LOG_CONSOLE         (1UL << 20)
@@ -60,9 +65,6 @@
 #define QSE_LOG_SYSLOG          (1UL << 22)
 #define QSE_LOG_SYSLOG_REMOTE   (1UL << 23)
 
-#define QSE_LOG_MASK_PRIORITY 0x00000FFFUL
-#define QSE_LOG_MASK_OPTION   0x000FF000UL
-#define QSE_LOG_MASK_TARGET   0xFFF00000UL
 
 
 /* facility */
@@ -92,8 +94,18 @@ enum qse_log_facility_t
 typedef enum qse_log_facility_t qse_log_facility_t;
 
 
+/* TODO: support ENABLE_MASKED??? */
 #define QSE_LOG_ENABLED(log,pri) ((pri) <= ((log)->flags & QSE_LOG_MASK_PRIORITY)) 
 
+
+#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
+#define QSE_LOG(log,ident,pri,...) \
+	do { \
+		if (QSE_LOG_ENABLED(log,pri)) \
+			qse_log_report (log, ident, pri, __VA_ARGS__); \
+	} while (0)
+#endif
+
 #define QSE_LOG0(log,ident,pri,fmt) \
 	do { \
 		if (QSE_LOG_ENABLED(log,pri)) \
diff --git a/qse/lib/awk/mod-math.c b/qse/lib/awk/mod-math.c
index 7d19918b..9ed2a09d 100644
--- a/qse/lib/awk/mod-math.c
+++ b/qse/lib/awk/mod-math.c
@@ -374,6 +374,21 @@ static qse_awk_flt_t math_log (qse_awk_t* awk, qse_awk_flt_t x)
 #endif
 }
 
+static qse_awk_flt_t math_log2 (qse_awk_t* awk, qse_awk_flt_t x)
+{
+#if defined(QSE_USE_AWK_FLTMAX) && defined(HAVE_LOG2Q)
+	return log2q (x);
+#elif defined(HAVE_LOG2L) && (QSE_SIZEOF_LONG_DOUBLE > QSE_SIZEOF_DOUBLE)
+	return log2l (x);
+#elif defined(HAVE_LOG2)
+	return log2 (x);
+#elif defined(HAVE_LOG2F)
+	return log2f (x);
+#else
+	#error ### no log2 function available ###
+#endif
+}
+
 static qse_awk_flt_t math_log10 (qse_awk_t* awk, qse_awk_flt_t x)
 {
 #if defined(QSE_USE_AWK_FLTMAX) && defined(HAVE_LOG10Q)
@@ -494,6 +509,11 @@ static int fnc_log (qse_awk_rtx_t* rtx, const qse_awk_fnc_info_t* fi)
 	return fnc_math_1 (rtx, fi, math_log);
 }
 
+static int fnc_log2 (qse_awk_rtx_t* rtx, const qse_awk_fnc_info_t* fi)
+{
+	return fnc_math_1 (rtx, fi, math_log2);
+}
+
 static int fnc_log10 (qse_awk_rtx_t* rtx, const qse_awk_fnc_info_t* fi)
 {
 	return fnc_math_1 (rtx, fi, math_log10);
@@ -600,6 +620,7 @@ static fnctab_t fnctab[] =
 	{ QSE_T("floor"),   { { 1, 1, QSE_NULL },     fnc_floor,      0 } },
 	{ QSE_T("log"),     { { 1, 1, QSE_NULL },     fnc_log,        0 } },
 	{ QSE_T("log10"),   { { 1, 1, QSE_NULL },     fnc_log10,      0 } },
+	{ QSE_T("log2"),    { { 1, 1, QSE_NULL },     fnc_log2,       0 } },
 	{ QSE_T("rand"),    { { 0, 0, QSE_NULL },     fnc_rand,       0 } },
 	{ QSE_T("round"),   { { 1, 1, QSE_NULL },     fnc_round,      0 } },
 	{ QSE_T("sin"),     { { 1, 1, QSE_NULL },     fnc_sin,        0 } },
diff --git a/qse/lib/si/log.c b/qse/lib/si/log.c
index 8ac6da3f..bce0d81c 100644
--- a/qse/lib/si/log.c
+++ b/qse/lib/si/log.c
@@ -37,6 +37,7 @@
 	#include <sys/socket.h>
 	#include <netinet/in.h>
 	#include <sys/un.h>
+	#include <sys/utsname.h>
 	#include "../cmn/syscall.h"
 #endif
 
@@ -49,8 +50,7 @@ static const qse_char_t* __priority_names[] =
 	QSE_T("warning"),
 	QSE_T("notice"),
 	QSE_T("info"),
-	QSE_T("debug"),
-	QSE_NULL
+	QSE_T("debug")
 };
 
 static const qse_mchar_t* __syslog_month_names[] =
@@ -332,17 +332,16 @@ void qse_log_setpriority (qse_log_t* log, int priority)
 
 int qse_log_setprioritybyname (qse_log_t* log, const qse_char_t* name)
 {
-	const qse_char_t** p = __priority_names;
 
-	while (*p != QSE_NULL) 
+	qse_size_t i;
+
+	for (i = 0; i < QSE_COUNTOF(__priority_names); i++)
 	{
-		if (qse_strcmp(*p, name) == 0) 
+		if (qse_strcmp(__priority_names[i], name) == 0) 
 		{
-			qse_log_setpriority (log, (int)(p - __priority_names));
+			qse_log_setpriority (log, i);
 			return 0;
 		}
-
-		p++;
 	}
 
 	return -1;
@@ -523,7 +522,7 @@ void qse_log_reportv (qse_log_t* log, const qse_char_t* ident, int pri, const qs
 		if (!log->wmsgbuf) goto done;
 #endif
 
-		sl_pri = (pri < QSE_COUNTOF(__syslog_priority))? __syslog_priority[pri]: LOG_DEBUG;
+		sl_pri = (pri < QSE_COUNTOF(__syslog_priority))? __syslog_priority[(pri & QSE_LOG_MASK_PRIORITY)]: LOG_DEBUG;
 
 		fplen = qse_mbs_fmt(log->dmsgbuf, QSE_MT("<%d>"), (int)(log->syslog_facility | sl_pri));
 		if (fplen == (qse_size_t)-1) goto done;
@@ -534,6 +533,17 @@ void qse_log_reportv (qse_log_t* log, const qse_char_t* ident, int pri, const qs
 			cnow.hour, cnow.min, cnow.sec);
 		if (fpdlen == (qse_size_t)-1) goto done;
 
+
+		if (log->flags & QSE_LOG_HOST_IN_REMOTE_SYSLOG)
+		{
+			struct utsname un;
+			if (uname(&un) == 0)
+			{
+				fpdlen = qse_mbs_fcat (log->dmsgbuf, QSE_MT("%hs "), un.nodename);
+				if (fpdlen == (qse_size_t)-1) goto done;
+			}
+		}
+
 	#if defined(QSE_CHAR_IS_MCHAR)
 		identfmt = QSE_MT("%hs");
 		identparenfmt = QSE_MT("(%hs)");
diff --git a/qse/samples/si/log01.c b/qse/samples/si/log01.c
index 8b0c5e3b..9516e74a 100644
--- a/qse/samples/si/log01.c
+++ b/qse/samples/si/log01.c
@@ -13,15 +13,16 @@ void t1 (void)
 	qse_nwad_t nwad;
 
 	t.file = QSE_T("/tmp/t3.log");
-	//qse_strtonwad ("127.0.0.1:560", &nwad);
+	/*qse_strtonwad ("127.0.0.1:514", &nwad);*/
 	qse_strtonwad ("@/dev/log", &nwad);
 	qse_nwadtoskad (&nwad, &t.syslog_remote);
 
 	log = qse_log_open (QSE_MMGR_GETDFL(), 0, QSE_T("t3"), 
-		QSE_LOG_INCLUDE_PID | QSE_LOG_DEBUG | QSE_LOG_CONSOLE |
-		QSE_LOG_FILE | QSE_LOG_SYSLOG | QSE_LOG_SYSLOG_REMOTE, &t);
+		QSE_LOG_INCLUDE_PID | QSE_LOG_HOST_IN_REMOTE_SYSLOG |
+		QSE_LOG_DEBUG |
+		QSE_LOG_CONSOLE | QSE_LOG_FILE | QSE_LOG_SYSLOG | QSE_LOG_SYSLOG_REMOTE, &t);
 
-	QSE_ASSERT (qse_log_getoption (log) == QSE_LOG_INCLUDE_PID);
+	QSE_ASSERT (qse_log_getoption (log) == (QSE_LOG_INCLUDE_PID | QSE_LOG_HOST_IN_REMOTE_SYSLOG));
 	QSE_ASSERT (qse_log_gettarget (log, QSE_NULL) == (QSE_LOG_CONSOLE | QSE_LOG_FILE | QSE_LOG_SYSLOG | QSE_LOG_SYSLOG_REMOTE));
 
 	for (i = 0; i < 10; i++)
@@ -32,19 +33,25 @@ void t1 (void)
 			qse_log_target_t t2;
 
 			qse_log_gettarget (log, &t2);
-			qse_strtonwad ("127.0.0.1:560", &nwad);
+			qse_strtonwad ("127.0.0.1:514", &nwad);
 			qse_nwadtoskad (&nwad, &t2.syslog_remote);
 			qse_log_settarget (log, QSE_LOG_CONSOLE | QSE_LOG_FILE | QSE_LOG_SYSLOG_REMOTE, &t2);
 
 			qse_log_setoption (log, qse_log_getoption(log) | QSE_LOG_KEEP_FILE_OPEN);
 
-			QSE_ASSERT (qse_log_getoption (log) == (QSE_LOG_INCLUDE_PID | QSE_LOG_KEEP_FILE_OPEN));
+			QSE_ASSERT (qse_log_getoption (log) == (QSE_LOG_INCLUDE_PID | QSE_LOG_HOST_IN_REMOTE_SYSLOG | QSE_LOG_KEEP_FILE_OPEN));
 			QSE_ASSERT (qse_log_gettarget (log, QSE_NULL) == (QSE_LOG_CONSOLE | QSE_LOG_FILE | QSE_LOG_SYSLOG_REMOTE));
 		}
 
 		QSE_LOG4 (log, QSE_T("test"), QSE_LOG_DEBUG, QSE_T("XXXXXXXX %d %I128x %#0128I128b %l20d >>"), 10 * i , q, q, (long)45);
 	}
 
+
+#if defined(QSE_LOG)
+	QSE_LOG (log, QSE_T("var"), QSE_LOG_INFO, QSE_T("variadic QSE_LOG() supported - no argument"));
+	QSE_LOG (log, QSE_T("var"), QSE_LOG_ERROR, QSE_T("variadic QSE_LOG() supported %d %d"), 1, 2);
+	QSE_LOG (log, QSE_T("var"), QSE_LOG_PANIC, QSE_T("variadic QSE_LOG() supported %10s"), QSE_T("panic"));
+#endif
 	qse_log_close (log);
 }