Include <cinttypes> for PRIuPTR. Not clear why this is needed.

test/cpp/end2end/async_end2end_test.cc

@@ -31,6 +31,7 @@
  *
  */
 
+#include <cinttypes>
 #include <memory>
 #include <thread>
 

test/cpp/interop/interop_client.cc

@@ -31,12 +31,10 @@
  *
  */
 
-#include "test/cpp/interop/interop_client.h"
+#include <cinttypes>
-
-#include <unistd.h>
-
 #include <fstream>
 #include <memory>
+#include <unistd.h>
 
 #include <grpc++/channel.h>
 #include <grpc++/client_context.h>
@@ -51,6 +49,7 @@
 #include "src/proto/grpc/testing/messages.grpc.pb.h"
 #include "src/proto/grpc/testing/test.grpc.pb.h"
 #include "test/cpp/interop/client_helper.h"
+#include "test/cpp/interop/interop_client.h"
 
 namespace grpc {
 namespace testing {

test/cpp/qps/driver.cc

@@ -31,6 +31,7 @@
  *
  */
 
+#include <cinttypes>
 #include <deque>
 #include <list>
 #include <thread>