Avoid warning on 32bit

On 32bit arches where time_t is defined as long int and where
sizeof(long)==sizeof(int), PRI_TIME is PRIu32 which is "u" and gcc warns about
ignoring the long part of the integer type. There is no problem besides the
warning.

Upcast time_t to 64bit and get rid of PRI_TIME and configure checks

udevadm-monitor.c: In function ‘print_device’:
udevadm-monitor.c:49:16: warning: format ‘%u’ expects argument of type ‘unsigned int’, but argument 3 has type ‘__time_t’ {aka ‘long int’} [-Wformat=]
   49 |         printf("%-6s[%"PRI_TIME".%06ld] %-8s %s (%s)\n",
      |                ^~~~~~~~
   50 |                source,
   51 |                ts.tv_sec, ts.tv_nsec/1000,
      |                ~~~~~~~~~
      |                  |
      |                  __time_t {aka long int}
In file included from ../../src/shared/macro.h:26,
                 from udev.h:26,
                 from udevadm-monitor.c:35:
/usr/include/inttypes.h:104:19: note: format string is defined here
  104 | # define PRIu32  "u"

configure.ac

@@ -79,7 +79,6 @@ AC_CHECK_SIZEOF(pid_t)
 AC_CHECK_SIZEOF(uid_t)
 AC_CHECK_SIZEOF(gid_t)
 AC_CHECK_SIZEOF(dev_t)
-AC_CHECK_SIZEOF(time_t)
 AC_CHECK_SIZEOF(rlim_t,,[[
 #include <sys/time.h>
 #include <sys/resource.h>]])

src/shared/formats-util.h

@@ -46,14 +46,6 @@
 #  error Unknown gid_t size
 #endif
 
-#if SIZEOF_TIME_T == 8
-#  define PRI_TIME PRIi64
-#elif SIZEOF_TIME_T == 4
-#  define PRI_TIME PRIu32
-#else
-#  error Unknown time_t size
-#endif
-
 #if SIZEOF_RLIM_T == 8
 #  define RLIM_FMT "%" PRIu64
 #elif SIZEOF_RLIM_T == 4

src/udev/udevadm-monitor.c

@@ -46,9 +46,9 @@ static void print_device(struct udev_device *device, const char *source, int pro
         struct timespec ts;
 
         clock_gettime(CLOCK_MONOTONIC, &ts);
-        printf("%-6s[%"PRI_TIME".%06ld] %-8s %s (%s)\n",
+        printf("%-6s[%"PRIi64".%06ld] %-8s %s (%s)\n",
                source,
-               ts.tv_sec, ts.tv_nsec/1000,
+               (int64_t)ts.tv_sec, ts.tv_nsec/1000,
                udev_device_get_action(device),
                udev_device_get_devpath(device),
                udev_device_get_subsystem(device));