building Android Project - unable to find "Ninja"

[mjkuwp94]

Hello,

after having completed the native build successfully
https://openthread.io/guides/commissioner/build

 I am following

openthread/ot-commissioner/blob/main/android/BUILDING.md

pretty much the first step is to run the script

ANDROID_ABI=arm64-v8a ANDROID_NDK_HOME=$HOME/Library/Android/sdk/ndk-bundle ./build-commissioner-libs.sh

it fails with this message

CMake Error at /usr/share/cmake-3.16/Modules/CMakeDetermineSystem.cmake:99 (message):

  Could not find toolchain file:

  /home/mark/Library/Android/sdk/ndk-bundle/build/cmake/android.toolchain.cmake

Call Stack (most recent call first):

  CMakeLists.txt:30 (project)

CMake Error: CMake was unable to find a build program corresponding to "Ninja".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.

CMake Error: CMAKE_C_COMPILER not set, after EnableLanguage

CMake Error: CMAKE_CXX_COMPILER not set, after EnableLanguage

-- Configuring incomplete, errors occurred!

My build computer is Ubuntu 20.04.2.0 LTS on x64 (mac mini) just to do these OpenThread projects so it is pretty fresh.

does anyone know the problem?

is it similar to this issue from 4 years ago?

https://stackoverflow.com/questions/38658014/ninja-not-found-by-cmake

thanks!

Mark

[Kangping Dong]

Hi,

You need an Android NDK to build the  example App.

You can find more information about Android NDK CMake toolchain at https://developer.android.com/ndk/guides/cmake.

BRs,

Kangping

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