--- firefox-60.3.0/memory/build/Mutex.h.old	2018-10-17 20:39:32.000000000 +0000
+++ firefox-60.3.0/memory/build/Mutex.h	2018-10-26 05:22:54.980000000 +0000
@@ -57,7 +57,7 @@
     }
 #elif defined(XP_DARWIN)
     mMutex = OS_UNFAIR_LOCK_INIT;
-#elif defined(XP_LINUX) && !defined(ANDROID)
+#elif defined(XP_LINUX) && defined(__GLIBC__)
     pthread_mutexattr_t attr;
     if (pthread_mutexattr_init(&attr) != 0) {
       return false;
@@ -142,7 +142,7 @@
 
 #  if defined(XP_DARWIN)
 #    define STATIC_MUTEX_INIT OS_UNFAIR_LOCK_INIT
-#  elif defined(XP_LINUX) && !defined(ANDROID)
+#  elif defined(XP_LINUX) && defined(__GLIBC__)
 #    define STATIC_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
 #  else
 #    define STATIC_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER