Pass environment variables to NDK build

Author: developernotes

android-database-sqlcipher/native.gradle

@@ -114,7 +114,11 @@ def executeNdkBuild(outputDir, androidMkDirectory, applicationMkFile, cflags) {
   exec {
     def outputDirectory = "NDK_LIBS_OUT=${outputDir}"
     def applicationFile = "NDK_APPLICATION_MK=${applicationMkFile}"
-    environment("SQLCIPHER_CFLAGS", "${cflags}")
+    def environmentVariables = ["SQLCIPHER_CFLAGS": "${cflags}",
+                                "OPENSSL_DIR": "${opensslDir}",
+                                "SQLCIPHER_DIR": "${sqlcipherDir}",
+                                "ANDROID_NATIVE_ROOT_DIR": "${androidNativeRootDir}"]
+    environment(environmentVariables)
     commandLine "ndk-build",
     "--environment-overrides", outputDirectory,
     "-C", androidMkDirectory, applicationFile

android-database-sqlcipher/src/main/cpp/Android.mk

@@ -2,13 +2,12 @@ LOCAL_PATH := $(call my-dir)
 MY_PATH := $(LOCAL_PATH)
 include $(CLEAR_VARS)
 LOCAL_PATH := $(MY_PATH)
-SQLCIPHER_DIR := $(LOCAL_PATH)/../external/sqlcipher
-SQLCIPHER_SRC := $(SQLCIPHER_DIR)/sqlite3.c
 
+SQLCIPHER_SRC := $(SQLCIPHER_DIR)/sqlite3.c
 LOCAL_CFLAGS +=  $(SQLCIPHER_CFLAGS) -DLOG_NDEBUG
 LOCAL_C_INCLUDES := $(SQLCIPHER_DIR) $(LOCAL_PATH)
 LOCAL_LDLIBS := -llog -latomic
-LOCAL_LDFLAGS += -L$(LOCAL_PATH)/../external/android-libs/$(TARGET_ARCH_ABI) -fuse-ld=bfd
+LOCAL_LDFLAGS += -L$(ANDROID_NATIVE_ROOT_DIR)/$(TARGET_ARCH_ABI) -fuse-ld=bfd
 LOCAL_STATIC_LIBRARIES += static-libcrypto
 LOCAL_MODULE    := libsqlcipher
 LOCAL_SRC_FILES := $(SQLCIPHER_SRC) \
@@ -25,6 +24,6 @@ include $(BUILD_SHARED_LIBRARY)
 
 include $(CLEAR_VARS)
 LOCAL_MODULE := static-libcrypto
-LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/../external/openssl/include
-LOCAL_SRC_FILES := $(LOCAL_PATH)/../external/android-libs/$(TARGET_ARCH_ABI)/libcrypto.a
+LOCAL_EXPORT_C_INCLUDES := $(OPENSSL_DIR)/include
+LOCAL_SRC_FILES := $(ANDROID_NATIVE_ROOT_DIR)/$(TARGET_ARCH_ABI)/libcrypto.a
 include $(PREBUILT_STATIC_LIBRARY)