AndroidNDK和Gradle:每种构建类型不同的Android.mk

我的本机库包含我想在编译时删除的日志.日志由限定所述预处理器宏所示ENABLE_DEBUG在LOCAL_CFLAGS像这样:

include $(CLEAR_VARS)
LOCAL_MODULE    := native-stuff
LOCAL_SRC_FILES := Native.cpp
LOCAL_LDLIBS := -llog
LOCAL_CFLAGS := -DENABLE_DEBUG
include $(BUILD_SHARED_LIBRARY)

我正在通过Android Studio使用Gradle构建应用程序,我希望有另一个Android.mk文件,不需要LOCAL_CFLAGS := -DENABLE_DEBUG发布版本,有效地禁用日志记录.

我尝试通过创建下面的文件夹并在没有CFLAGS的情况release/jni下src放置Android.mk的副本来实现.它成功构建和部署,但我仍然看到日志.这是我的build.gradle:

apply plugin: 'com.android.library'

android {
    compileSdkVersion 21
    buildToolsVersion "21.1.2"

    defaultConfig {
        minSdkVersion 17
        targetSdkVersion 21
        versionCode 1
        versionName "1.0"
    }

    sourceSets {
        main {
            //Tell Gradle where to put the compiled shared library
            jniLibs.srcDir 'src/main/libs'

            //disable automatic ndk-build call
            jni.srcDirs = [];
        }
        release {
            jni.srcDirs = [];
        }
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }

    // Tell Gradle the run the ndkBuild task when compiling
    tasks.withType(JavaCompile) {
        compileTask -> compileTask.dependsOn ndkBuild
    }

    // This task utilizes the Android.mk file defined in src/main/jni so that you
    // have more control over the build parameters (like library inclusion)
    // The system must define property 'androidNdkHome' in ~/.gradle/gradle.properties file
    // to point to NDK path
    task ndkBuild(type: Exec) {
        commandLine "$androidNdkHome/ndk-build", '-C', file('src/main/jni').absolutePath
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:support-v4:21.0.2'
}

我的项目结构如下所示:

src/
   main/
       jni/
          Android.mk
   release/
       jni/
          Android.mk

有可能做我想要的吗？