Update --version option to print 32/64-bit build and time_t size

Use only sizeof() and not SIZEOF_VOID_P/SIZEOF_TIME_T because these
macros could have invalid values in some macOS fat builds (See commit
170cbc8c6d484387ec7ae19ef9f4bd14dd0845e7).

This method should be future proof.

With this change we know:
whether this is a 32-bit or 64-bit build;
whether the time_t size is 32-bit or 64-bit.

[skip ci]

diff --git a/tcpdump.c b/tcpdump.c
index 80fd23d74f99cc7677ffb80d9ff981498ca5d44d..28f68077baeec6a26534aad8e3340a2e6c8c2995 100644 (file)
--- a/tcpdump.c
+++ b/tcpdump.c
@@ -3341,6 +3341,8 @@ print_version(FILE *f)
        (void)fprintf (f, "Compiled with MemorySanitizer/Clang.\n");
 #  endif
 #endif /* __SANITIZE_ADDRESS__ or __has_feature */
+       (void)fprintf (f, "%zu-bit build, %zu-bit time_t\n",
+                      sizeof(void *) * 8, sizeof(time_t) * 8);
 }
 DIAG_ON_DEPRECATION