uhd: Remove usage of time_t (except when required)

The C/C++ standards don't define what time_t is, only that it is
arithmetic (and real for C11, and integral for C++). It should not be
used in portable software and is only used as the return value for some
libc calls.
A common definition for time_t is int64_t, so we'll switch to that
permanently in our own APIs. System APIs will of course stick with
time_t.

1 files changed, 2 insertions, 2 deletions

diff --git a/host/examples/rx_samples_c.c b/host/examples/rx_samples_c.c
index b31450184..1cabafc9d 100644
--- a/host/examples/rx_samples_c.c
+++ b/host/examples/rx_samples_c.c
@@ -223,12 +223,12 @@ int main(int argc, char* argv[])
         // Handle data
         fwrite(buff, sizeof(float) * 2, num_rx_samps, fp);
         if (verbose) {
-            time_t full_secs;
+            int64_t full_secs;
             double frac_secs;
             uhd_rx_metadata_time_spec(md, &full_secs, &frac_secs);
             fprintf(stderr, "Received packet: %zu samples, %.f full secs, %f frac secs\n",
                     num_rx_samps,
-                    difftime(full_secs, (time_t) 0),
+                    difftime(full_secs, (int64_t) 0),
                     frac_secs);
         }