diff -rupN pjproject-2.6/third_party/build/os-linux.mak pjproject-2.6-new/third_party/build/os-linux.mak
--- pjproject-2.6/third_party/build/os-linux.mak	2014-01-03 04:44:05.000000000 +0100
+++ pjproject-2.6-new/third_party/build/os-linux.mak	2017-09-01 18:45:48.620150104 +0200
@@ -1,9 +1,9 @@
-DIRS += gsm
-DIRS += ilbc
-DIRS += speex
-DIRS += portaudio
-DIRS += g7221
-DIRS += srtp
-DIRS += resample
+#DIRS += gsm
+#DIRS += ilbc
+#DIRS += speex
+#DIRS += portaudio
+#DIRS += g7221
+#DIRS += srtp
+#DIRS += resample