Android SIP application using Linphone

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Mobile

Android

Step 1: Firstly I Downloaded NDK on my Mac with the new Android SDK pkg. Then gaved the PATH of my NDK folder in ADT -> Preferences -> Android -> NDK

Step 2: Then i installed Autotools using this link (Only Followed Commands written under point: 2.3 How do I install the Autotools (as user)?) ndk_build

Step 3: After that i downloaded linphone-android using Terminal using -

git clone git://git.linphone.org/linphone-android.git --recursive
Now i want to follow these steps : Step 4: Go to root directory of the downloaded project using command on Terminal:

$ cd /home/my_downloaded_project_path/linphone-android

And then Step 5:

$ ./prepare_sources.sh /home/android-ndk-r7b/ndk_build

I compile this
./prepare_sources.sh /home/android-ndk-r7b/ndk_build

and get the errors

$ ./prepare_sources.sh /home/android-ndk-r7b/ndk_build
using /home/android-ndk-r7b/ndk_build as android NDK
./prepare_sources.sh: line 23: git: command not found
./prepare_sources.sh: line 23: grep: command not found
Applying patch to ffmpeg
./prepare_sources.sh: line 26: patch: command not found
./prepare_sources.sh: line 29: ./autogen.sh: No such file or directory
iLBC prepare stage failed
./prepare_sources.sh: line 31: ./configure: No such file or directory
VP8 prepare stage failed.
./prepare_sources.sh: line 33: ./autogen.sh: No such file or directory
SILK audio plugin prepare state failed.
./prepare_sources.sh: line 35: cp: command not found
SRTP prepare state failed.
./prepare_sources.sh: line 37: cd: /home/linphone-android-master/submodules/linphone/mediastreamer2/src/: No such file or directory
./prepare_sources.sh: line 39: cat: command not found
./prepare_sources.sh: line 39: grep: command not found
./prepare_sources.sh: line 39: grep: command not found
./prepare_sources.sh: line 39: sed: command not found
./prepare_sources.sh: line 40: cat: command not found
./prepare_sources.sh: line 40: grep: command not found
./prepare_sources.sh: line 40: grep: command not found
./prepare_sources.sh: line 40: sed: command not found
yuv2rgb.vs.h creation error (do you have 'xxd' application installed ?)
/home/linphone-android-master/submodules/mssilk

please help me to resolve this