From c27261a8bc1e45ff7d7a585c79b2b871d47217e4 Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Fri, 26 Jul 2019 18:56:26 -0700
Subject: [PATCH] Define gettid() only for glibc < 2.30

glibc 2.30 has added this API, so let us use that when possible

Upstream-Status: Pending
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 src/core/lib/gpr/log_linux.cc          | 4 ++++
 src/core/lib/iomgr/ev_epollex_linux.cc | 7 +++++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/core/lib/gpr/log_linux.cc b/src/core/lib/gpr/log_linux.cc
index 561276f0c2..25a74864a1 100644
--- a/src/core/lib/gpr/log_linux.cc
+++ b/src/core/lib/gpr/log_linux.cc
@@ -40,7 +40,11 @@
 #include <time.h>
 #include <unistd.h>
 
+#if defined(__GLIBC__) && (__GLIBC_MINOR__ >= 29)
+#include <unistd.h>
+#else
 static long gettid(void) { return syscall(__NR_gettid); }
+#endif
 
 void gpr_log(const char* file, int line, gpr_log_severity severity,
              const char* format, ...) {
diff --git a/src/core/lib/iomgr/ev_epollex_linux.cc b/src/core/lib/iomgr/ev_epollex_linux.cc
index 08116b3ab5..d3d3025111 100644
--- a/src/core/lib/iomgr/ev_epollex_linux.cc
+++ b/src/core/lib/iomgr/ev_epollex_linux.cc
@@ -1101,10 +1101,13 @@ static void end_worker(grpc_pollset* pollset, grpc_pollset_worker* worker,
   gpr_atm_no_barrier_fetch_add(&pollset->worker_count, -1);
 }
 
-#ifndef NDEBUG
+#if !defined(DEBUG)
+#if defined(__GLIBC__) && (__GLIBC_MINOR__ >= 29)
+#include <unistd.h>
+#else
 static long gettid(void) { return syscall(__NR_gettid); }
 #endif
-
+#endif
 /* pollset->mu lock must be held by the caller before calling this.
    The function pollset_work() may temporarily release the lock (pollset->po.mu)
    during the course of its execution but it will always re-acquire the lock and
-- 
2.22.0