--- a/mozilla/tools/profiler/core/platform.h	2019-11-25 10:49:40.678940150 -0500
+++ a/mozilla/tools/profiler/core/platform.h	2019-11-25 10:50:36.148831703 -0500
@@ -65,10 +65,7 @@ 
 #include <unistd.h>
 #if !defined(__BIONIC__)
 #include <sys/syscall.h>
-static inline pid_t gettid()
-{
-  return (pid_t) syscall(SYS_gettid);
-}
+#define gettid() static_cast<pid_t>(syscall(SYS_gettid))
 #endif
 #endif
 
--- a/mozilla/tools/profiler/core/GeckoSampler.cpp	2019-11-25 11:23:14.022397528 -0500
+++ a/mozilla/tools/profiler/core/GeckoSampler.cpp	2019-11-25 11:27:43.539905660 -0500
@@ -67,7 +67,7 @@ 
 
 #if defined(LINUX) || defined(XP_MACOSX)
 #include <sys/types.h>
-pid_t gettid();
+// pid_t gettid();
 #endif
 
 #if defined(__arm__) && defined(ANDROID)