How do i resolve this linphone $ make error?

I was able to successfully run the .prepare.py script in top directory without errors.

However when i run the $ make command, i get the error bellow.

Can anybody save me from this torment.

---

[ 33%] Building C object src/CMakeFiles/msamr.dir/amrnb.c.o
/home/pnwoke/linphone-android/submodules/msamr/src/amrnb.c:31:10: fatal error: 
      'amrnb/interf_dec.h' file not found
#include <amrnb/interf_dec.h>
         ^
1 error generated.
src/CMakeFiles/msamr.dir/build.make:77: recipe for target 'src/CMakeFiles/msamr.dir/amrnb.c.o' failed
make[6]: *** [src/CMakeFiles/msamr.dir/amrnb.c.o] Error 1
make[6]: Leaving directory '/home/pnwoke/linphone-android/WORK/android-arm/Build/msamr'
CMakeFiles/Makefile2:75: recipe for target 'src/CMakeFiles/msamr.dir/all' failed
make[5]: *** [src/CMakeFiles/msamr.dir/all] Error 2
make[5]: Leaving directory '/home/pnwoke/linphone-android/WORK/android-arm/Build/msamr'
Makefile:117: recipe for target 'all' failed
make[4]: *** [all] Error 2
make[4]: Leaving directory '/home/pnwoke/linphone-android/WORK/android-arm/Build/msamr'
CMakeFiles/EP_msamr.dir/build.make:111: recipe for target '/home/pnwoke/linphone-android/WORK/android-arm/Stamp/EP_msamr/EP_msamr-build' failed
make[3]: *** [/home/pnwoke/linphone-android/WORK/android-arm/Stamp/EP_msamr/EP_msamr-build] Error 2
make[3]: Leaving directory '/home/pnwoke/linphone-android/WORK/android-arm/cmake'
CMakeFiles/Makefile2:571: recipe for target 'CMakeFiles/EP_msamr.dir/all' failed
make[2]: *** [CMakeFiles/EP_msamr.dir/all] Error 2
make[2]: Leaving directory '/home/pnwoke/linphone-android/WORK/android-arm/cmake'
Makefile:76: recipe for target 'all' failed
make[1]: *** [all] Error 2
make[1]: Leaving directory '/home/pnwoke/linphone-android/WORK/android-arm/cmake'
Makefile:148: recipe for target 'arm-build' failed
make: *** [arm-build] Error 2