Implement timer* macros, and GNU's getopt_long

include/bits/sys/time.h

@@ -0,0 +1,23 @@
+#ifndef _BITS_SYS_TIME
+#define _BITS_SYS_TIME
+
+#define timeradd(x,y,res) (void) (\
+        (res)->tv_sec = (x)->tv_sec + (y)->tv_sec + ((x)->tv_usec + (y)->tv_usec / 1000000), \
+        (res)->tv_usec = ((x)->tv_usec + (y)->tv_usec) % 1000000 \
+    )
+#define timersub(x,y,res) (void) ( \
+        (res)->tv_sec = (x)->tv_sec - (y)->tv_sec, \
+        (res)->tv_usec = ((x)->tv_usec - (y)->tv_usec), \
+        ((res)->tv_usec < 0) && ((res)->tv_sec -= 1, (res)->tv_usec += 1000000) \
+    )
+#define timerclear(t) (void) ( \
+        (t)->tv_sec = 0, \
+        (t)->tv_usec = 0 \
+    )
+#define timerisset(t) (t)->tv_sec || (t)->tv_usec
+#define timercmp(x,y,op) (x)->tv_sec == (y)->tv_sec ? \
+    (x)->tv_usec op (y)->tv_usec \
+    : \
+    (x)->tv_sec op (y)->tv_sec
+
+#endif