From 8ce2783b4bc6d4507232362430554c6462790ce6 Mon Sep 17 00:00:00 2001
From: Benjamin Barenblat <bbaren@google.com>
Date: Tue, 15 Jan 2019 11:30:32 -0500
Subject: Correct a format string

Use a format string macro from inttypes.h when printfing thread IDs on
non-Windows, non-Linux platforms. This silences a -Wformat trigger when
cross-compiling for macOS.
---
 src/core/lib/gpr/log_posix.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/core/lib/gpr/log_posix.cc b/src/core/lib/gpr/log_posix.cc
index 0acb225572..b6edc14ab6 100644
--- a/src/core/lib/gpr/log_posix.cc
+++ b/src/core/lib/gpr/log_posix.cc
@@ -24,6 +24,7 @@
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
 #include <grpc/support/time.h>
+#include <inttypes.h>
 #include <pthread.h>
 #include <stdarg.h>
 #include <stdio.h>
@@ -83,7 +84,7 @@ void gpr_default_log(gpr_log_func_args* args) {
   }
 
   char* prefix;
-  gpr_asprintf(&prefix, "%s%s.%09d %7tu %s:%d]",
+  gpr_asprintf(&prefix, "%s%s.%09d %7" PRIdPTR " %s:%d]",
                gpr_log_severity_string(args->severity), time_buffer,
                (int)(now.tv_nsec), gettid(), display_file, args->line);
 
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