--- seamonkey-2.49.4/mozilla/tools/profiler/core/platform.h~	2018-07-12 04:19:15.000000000 +0200
+++ seamonkey-2.49.4/mozilla/tools/profiler/core/platform.h	2019-10-10 14:38:34.367540687 +0200
@@ -65,12 +65,14 @@
 #include <unistd.h>
 #if !defined(__BIONIC__)
 #include <sys/syscall.h>
+#if defined(__GLIBC__) && ! __GLIBC_PREREQ(2, 30)
 static inline pid_t gettid()
 {
   return (pid_t) syscall(SYS_gettid);
 }
 #endif
 #endif
+#endif
 
 #ifdef XP_WIN
 #include <windows.h>