Error after upgrading Android Studio NDK: CMAKE_C_COMPILER and CMAKE_CXX_COMPILER not set

Question

After updating Android Studio NDK, I can't build my app, due to an error related to CMAKE (my application uses one c++ file). Here are the error lines:

Build command failed.
Error while executing process C:\Users\AnimallTag\AppData\Local\Android\sdk\cmake\3.6.4111459\bin\cmake.exe with arguments {-HC:\Projetos\Git\at65\app -BC:\Projetos\Git\at65\app\.externalNativeBuild\cmake\debug\mips -GAndroid Gradle - Ninja -DANDROID_ABI=mips -DANDROID_NDK=C:\Users\AnimallTag\AppData\Local\Android\sdk\ndk-bundle -DCMAKE_LIBRARY_OUTPUT_DIRECTORY=C:\Projetos\Git\at65\app\build\intermediates\cmake\debug\obj\mips -DCMAKE_BUILD_TYPE=Debug -DCMAKE_MAKE_PROGRAM=C:\Users\AnimallTag\AppData\Local\Android\sdk\cmake\3.6.4111459\bin\ninja.exe -DCMAKE_TOOLCHAIN_FILE=C:\Users\AnimallTag\AppData\Local\Android\sdk\ndk-bundle\build\cmake\android.toolchain.cmake -DANDROID_PLATFORM=android-14}
 (include)   CMakeLists.txt 
CMake Error: CMAKE_C_COMPILER not set, after EnableLanguage
CMake Error: CMAKE_CXX_COMPILER not set, after EnableLanguage
-- Configuring incomplete, errors occurred!

Any suggestion to help me solve that problem? Maybe a way I can downgrade NDK or a Android Studio previous version I can install...

Answer 1

I managed to fix it. One thing I noticed was the changelog of android NDK, and it says there is no more support for armeabi, MIPS and MIPS64 ABIs, so I filtered ABIs in my build.gradle file:

android {
    defaultConfig {
        externalNativeBuild {
            cmake {
                abiFilters 'arm64-v8a', 'armeabi-v7a', 'x86', 'x86_64'
            }
        }
    }
}

After that I synchronized gradle and Android Studio prompted me to update Gradle, and I did. The app can now be deployed, but I'm not sure what fixed it. Apparently the error was not related to CMAKE_C_COMPILER neither CMAKE_CXX_COMPILER, it was happening somewhere else and when the build failed, it wasn't able to find those variables. Maybe this can help someone too...

Answer 2

After NDK Recent update CMAKE was breaking

Nothing Worked but I downgraded NDK by downloading NDK from https://developer.android.com/ndk/downloads/older_releases

and changed NDK DIR PATH in local.properties to

ndk.dir=/Users/kathan/Library/Android/sdk/android-ndk-r17c

And just Sync Gradle.

Worked like Charm