diff -up webrtc-audio-processing-0.2/webrtc/modules/audio_processing/Makefile.am.no_undefined webrtc-audio-processing-0.2/webrtc/modules/audio_processing/Makefile.am
--- webrtc-audio-processing-0.2/webrtc/modules/audio_processing/Makefile.am.no_undefined	2015-11-19 06:41:44.000000000 -0600
+++ webrtc-audio-processing-0.2/webrtc/modules/audio_processing/Makefile.am	2016-05-16 11:35:36.772987393 -0500
@@ -166,8 +166,8 @@ libwebrtc_audio_processing_la_LIBADD = $
 				       $(top_builddir)/webrtc/base/libbase.la \
 				       $(top_builddir)/webrtc/system_wrappers/libsystem_wrappers.la \
 				       $(top_builddir)/webrtc/common_audio/libcommon_audio.la \
-				       $(top_builddir)/webrtc/modules/audio_coding/libaudio_coding.la
-libwebrtc_audio_processing_la_LDFLAGS = $(AM_LDFLAGS) -version-info $(LIBWEBRTC_AUDIO_PROCESSING_VERSION_INFO)
+				       $(top_builddir)/webrtc/modules/audio_coding/libaudio_coding.la -lpthread
+libwebrtc_audio_processing_la_LDFLAGS = $(AM_LDFLAGS) -Wl,--no-undefined -version-info $(LIBWEBRTC_AUDIO_PROCESSING_VERSION_INFO)
 
 # FIXME: The MIPS optimisations need to be hooked up once we have the
 # autotools conditionals in place