diff -Naurw firefox-43.0.orig/tools/profiler/core/platform-linux.cc firefox-43.0/tools/profiler/core/platform-linux.cc
--- firefox-43.0.orig/tools/profiler/core/platform-linux.cc	2016-01-03 15:43:43.947413010 -0800
+++ firefox-43.0/tools/profiler/core/platform-linux.cc	2016-01-03 15:44:42.982411331 -0800
@@ -710,11 +710,13 @@
 void TickSample::PopulateContext(void* aContext)
 {
   MOZ_ASSERT(aContext);
+#if defined(__GLIBC__)
   ucontext_t* pContext = reinterpret_cast<ucontext_t*>(aContext);
   if (!getcontext(pContext)) {
     context = pContext;
     SetSampleContext(this, aContext);
   }
+#endif
 }
 
 void OS::SleepMicro(int microseconds)