"No rule to make target" when compiling NDK sources on Windows

[Andrew Marshall]

I am attempting a basic Android app containing an NDK library built from source. I get the following error when building : 

---------------------------------------

> gradlew assembleArm

:mlabdemo:compileArmDebugNdk

make.exe: *** No rule to make target `C:\Users\Andrew\dev\MLabDemo\mlabdemo\build\ndk\arm\debug\obj/local/armeabi-v7a/objs-debug/process/C_\Users\Andrew\dev\MLabDemo\mlabdemo\src\main\jni', needed by `C:\Users\Andrew\dev\MLabDemo\mlabdemo\build\ndk\arm\debug\obj/local/armeabi-v7a/objs-debug/process/C_\Users\Andrew\dev\MLabDemo\mlabdemo\src\main\jni\process.o'.  Stop.

:mlabdemo:compileArmDebugNdk FAILED

FAILURE: Build failed with an exception.

* What went wrong:

Execution failed for task ':mlabdemo:compileArmDebugNdk'.

> com.android.ide.common.internal.LoggedErrorException: Failed to run command:

        C:\Users\Andrew\dev\android-ndk-r9d\ndk-build.cmd NDK_PROJECT_PATH=null APP_BUILD_SCRIPT=C:\Users\Andrew\dev\MLabDemo\mlabdemo\build\ndk\arm\debug\Android.mk APP_PLATFORM=android-18 NDK_OUT=C:\Users\Andrew\dev\MLabDemo\mlabdemo\build\ndk\arm\debug\obj NDK_LIBS_OUT=C:\Users\Andrew\dev\MLabDemo\mlabdemo\build\ndk\arm\debug\lib NDK_DEBUG=1 APP_STL=stlport_static APP_ABI=armeabi-v7a

Error Code:

        2

---------------------------------

The path segments I've highlighted in red look odd to me. The Makefile generated by gradle looks like this : 

---------------------------------

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE := process

LOCAL_CFLAGS := -DANDROID_NDK

LOCAL_SRC_FILES := \

C:\Users\Andrew\dev\MLabDemo\mlabdemo\src\main\jni\process.cpp \

LOCAL_C_INCLUDES += C:\Users\Andrew\dev\MLabDemo\mlabdemo\src\main\jni

LOCAL_C_INCLUDES += C:\Users\Andrew\dev\MLabDemo\mlabdemo\src\arm\jni

LOCAL_C_INCLUDES += C:\Users\Andrew\dev\MLabDemo\mlabdemo\src\debug\jni

LOCAL_C_INCLUDES += C:\Users\Andrew\dev\MLabDemo\mlabdemo\src\armDebug\jni

include $(BUILD_SHARED_LIBRARY)

-------------------------------------

I am using 

 - gradle plugin 0.9

 - NDK r9d for Windows x64

I'd appreciate any help. I've got some experience with gradle and GNU build tools but I'm new to Android and the NDK.

Cheers,

Andrew.

[Xavier Ducrohet]

This looks totally wrong. I'll look into it.

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--
Xavier Ducrohet
Android SDK Tech Lead
Google Inc.
http://developer.android.com | http://tools.android.com

Please do not send me questions directly. Thanks!

[Xavier Hallade]

Hi,

I've filled a bug on this last week: https://code.google.com/p/android/issues/detail?id=66937

It's a really weird once, since I just needed to add a second source file to be compiled to "fix" this error, and same command worked.

Regards,

Xavier.