diff -rupN --no-dereference pjproject-2.10/third_party/build/os-linux.mak pjproject-2.10-new/third_party/build/os-linux.mak
--- pjproject-2.10/third_party/build/os-linux.mak	2020-02-14 10:48:27.000000000 +0100
+++ pjproject-2.10-new/third_party/build/os-linux.mak	2020-11-30 01:08:57.557730494 +0100
@@ -1,9 +1,10 @@
-DIRS += gsm
-DIRS += ilbc
-DIRS += speex
-DIRS += portaudio
-DIRS += g7221
+#DIRS += gsm
+#DIRS += ilbc
+#DIRS += speex
+#DIRS += portaudio
+#DIRS += g7221
 DIRS += srtp
-DIRS += resample
+#DIRS += resample
+DIRS += webrtc