Add sample for ldFlags

[Nimrodda]

In traditional NDK make file, I can link a prebuilt static library and specify its headers directory:
Android.mk

include $(CLEAR_VARS)
LOCAL_MODULE            := somelibrary-prebuilt-static
LOCAL_SRC_FILES         := $(TARGET_ARCH_ABI)/libsomelibrary.a
LOCAL_EXPORT_C_INCLUDES := include 
include $(PREBUILT_STATIC_LIBRARY)

How do I do that in build.gradle using the new plugin's DSL?

[proppy]

@Nimrodda you can use ldFlags directive, see https://code.google.com/p/android/issues/detail?id=177628.

Updating this issue to request a new sample for showing the proper syntax.

[proppy]

Also note #27 build.gradle doesn't yet support building separate library, so you would have to build the standalone library with Android.mk before referencing it with ldFlags.

[Nimrodda]

Thanks for your answer.
Can you paste an example of how to use ldFlags directive with pre-built static lib, taking into account different TARGET_ARCH_ABIs?
Also, in previous revision there used to be jniLibs folder for that purpose. Is it now dropped completely?

[proppy]

@Nimrodda http://tools.android.com/tech-docs/new-build-system/gradle-experimental has an example using ldFlags.

It doesn't show how to handle this for different TARGET_ARCH_ABI thought, let's ping @rschiu he recently made a change that should enable this:
https://android-review.googlesource.com/#/c/155834/5

[rschiu]

If you have one ABI per flavor, you can specify the ldLibs for that flavor. If you have an apk with multiple ABI, you will need to wait for https://code.google.com/p/android/issues/detail?id=178074 to be resolved, which should be available in the next release.

[rschiu]

Also, jniLibs should still work. .so in src/main/jniLibs should be packaged into the apk. Does it not?

[proppy]

hello-thirdparty shows this now: https://github.com/googlesamples/android-ndk/tree/master/hello-thirdparty