From: Jory A. Pratt <anarchy@gentoo.org>

getcontext is only avaliable on glibc systems

--- a/tools/profiler/core/platform-linux-android.cpp
+++ b/tools/profiler/core/platform-linux-android.cpp
@@ -497,8 +497,10 @@ static void PlatformInit(PSLockRef aLock) {}
 ucontext_t sSyncUContext;
 
 void Registers::SyncPopulate() {
+#if defined(__GLIBC__)
   if (!getcontext(&sSyncUContext)) {
     PopulateRegsFromContext(*this, &sSyncUContext);
   }
+#endif
 }
 #endif