Android: update tools (gradle, NDK) & prepare to switch to clang

build/android/Makefile

@@ -31,11 +31,11 @@ TARGET_HOST = arm-linux
 TARGET_ABI = armeabi-v7a
 TARGET_LIBDIR = armeabi-v7a
 TARGET_TOOLCHAIN = arm-linux-androideabi-
-TARGET_CFLAGS_ADDON = -mfloat-abi=softfp -mfpu=vfpv3 -O3 -D__ANDROID_API__=$(API)
+TARGET_CFLAGS_ADDON = -mfloat-abi=softfp -mfpu=vfpv3 -O3
 TARGET_CXXFLAGS_ADDON = $(TARGET_CFLAGS_ADDON)
 TARGET_ARCH = armv7
 CROSS_PREFIX = arm-linux-androideabi-
-COMPILER_VERSION = 4.9
+COMPILER_VERSION = clang
 HAVE_LEVELDB = 0
 
 ################################################################################

build/android/build.gradle

@@ -1,17 +1,19 @@
 buildscript {
 	repositories {
 		mavenCentral()
+		jcenter()
+		google()
 	}
 	dependencies {
-		classpath "com.android.tools.build:gradle:1.5.0"
+		classpath "com.android.tools.build:gradle:3.0.1"
 	}
 }
 
 apply plugin: "com.android.application"
 
 android {
 	compileSdkVersion 25
-	buildToolsVersion "25.0.3"
+	buildToolsVersion "26.0.2"
 
 	defaultConfig {
 		versionCode 17
@@ -20,6 +22,12 @@ android {
 		targetSdkVersion 14
 		applicationId "net.minetest.minetest"
 		manifestPlaceholders = [ package: "net.minetest.minetest", project: project.name ]
+		ndk {
+			// Specifies the ABI configurations of your native
+			// libraries Gradle should build and package with your APK.
+			abiFilters 'x86', 'x86_64', 'armeabi', 'armeabi-v7a',
+			'arm64-v8a'
+		}
 	}
 
 	lintOptions {

build/android/gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip

build/android/jni/Deps.mk

@@ -1,7 +1,7 @@
 APP_PLATFORM := ${APP_PLATFORM}
 APP_ABI := ${TARGET_ABI}
-APP_STL := gnustl_static
-NDK_TOOLCHAIN_VERSION := 4.9
+APP_STL := c++_shared
+NDK_TOOLCHAIN_VERSION := ${COMPILER_VERSION}
 APP_DEPRECATED_HEADERS := true
 
 APP_CLAFGS += -mfloat-abi=softfp -mfpu=vfpv3 -O3