Error: Program "/NDK-build" not found in PATH

Question

I need help. I'm trying to install and configure OpenCV 2.4.7 library in my computer (Ubuntu 12.04). After run OpenCV samples appears those errors in my Console:

Cannot run program "/NDK-build": Unknown reason

Error: Program "/NDK-build" not found in PATH=[/usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games]

I've seen numerous tutorials and nothing worked. I ask you to be very specific since I am "new" programming and also because my mother tongue is not English (I have some difficulties). Thank you!

Answer 1

Easiest Method which worked for me is.

Goto the Project Properties
Click on C/C++ Build (An other list will open)
Click on the Environment from the list
Now click on Add

Here you have to Put 2 values
Put Name as NDKROOT
In Value put PATH TO THE NDK FOLDER

You are done :)

Answer 2

Same case happened with me (when my NDK location was already set), so changing to original Android Builder removed my problem for doing so simply go to project properties, C/C++ Build | Tool Chain Editor and select Android Builder as current builder.