X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/64ab4a9e04c8f92871a9c3a89b91ddf3498741c3..40f1cf8aa72185cce0994aaaf8b14d524e5a4d8b:/netdissect-stdinc.h

diff --git a/netdissect-stdinc.h b/netdissect-stdinc.h
index 5aef8234..9cf3cf07 100644
--- a/netdissect-stdinc.h
+++ b/netdissect-stdinc.h
@@ -148,12 +148,23 @@
         #define PRIu64	"llu"
       #endif
     #endif
+
+    /*
+     * MSVC's support library doesn't support %zu to print a size_t until
+     * Visual Studio 2017, but supports %Iu earlier, so use that.
+     */
+    #define PRIsize	"Iu"
   #elif defined(__MINGW32__) || !defined(_WIN32)
     /*
      * Compiler is MinGW or target is UN*X or MS-DOS.  Just use
      * <inttypes.h>.
      */
     #include <inttypes.h>
+
+    /*
+     * Assume the support library supports %zu; it's required by C99.
+     */
+    #define PRIsize	"zu"
   #endif
 #endif /* HAVE_PCAP_PCAP_INTTYPES_H */