Develop Reference

Dependencies between 2 Android.mk files

I have 2 Android.mk files with the first one building a bunch of libraries and the second one builds another library, but needs the first one to be complete before kicking off it's own build. Is there any way to make sure this happens?
This is what I've tried so far:
LOCAL_ADDITIONAL_DEPENDENCIES := path/to/folder/for/android1.mk
Order of listing of these Android.m files (1 & 2)
Adding LOCAL_SHARED_LIBRARIES := a.so b.so ...
But, none of these have helped so far
######################################################################
# Android1.mk
######################################################################
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_SRC_FILES := a1.c a2.c
LOCAL_MODULE := lib_a
LOCAL_MODULE_TAGS := optional
LOCAL_PROPRIETARY_MODULE := true
LOCAL_MODULE_CLASS := SHARED_LIBRARIES
include $(BUILD_SHARED_LIBRARY)
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_SRC_FILES := b1.c b2.c
LOCAL_MODULE := lib_b
LOCAL_MODULE_TAGS := optional
LOCAL_PROPRIETARY_MODULE := true
LOCAL_MODULE_CLASS := SHARED_LIBRARIES
include $(BUILD_SHARED_LIBRARY)
######################################################################
# Android2.mk
######################################################################
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_SRC_FILES := abc.c xyz.c
LOCAL_MODULE := lib_2
LOCAL_PRELINK_MODULE := false
LOCAL_MODULE_TAGS := optional
LOCAL_PROPRIETARY_MODULE := true
LOCAL_MODULE_CLASS := SHARED_LIBRARIES
LOCAL_ADDITIONAL_DEPENDENCIES := /path/to/folder/where/Android1.mk/resides
LOCAL_SHARED_LIBRARIES += \
lib_a \
lib_b
include $(BUILD_SHARED_LIBRARY)
The caveat is that abc.c/xyz.c doesn't make any calls in lib_a.so/lib_b.so/lib_z.so. But, I'm generating a script (in Android2.mk) and for that, require all the libraries (in Android1.mk) to be built prior

Found a way to achieve this:
# List out all the dependencies here
INTERMEDIATE_TARGET := \
lib_1
lib_2
generate.abc: $(INTERMEDIATE_TARGET)

Android JNI native library not packaged to apk

While transforming my project from eclipse to AS.
I got a fatal error which caused by "the lib not found " problem.
My project contains jni codes,compiled by ndk build system and managed by the "Android.mk" file.
After transformed I found that two of the libraries(.so) was not packaged into the apk file while other libraries are packaged correctly.
Here is part of the content of "Android.mk" file,all libraries are packaged but "curl" and "jsqlite".The two files do exist in the right path.Is there any suggestion,thks!!
LOCAL_PATH := $(call my-dir)
MY_LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := skia
LOCAL_SRC_FILES := libs/$(TARGET_ARCH_ABI)/libskia.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := iconv
LOCAL_SRC_FILES := libs/$(TARGET_ARCH_ABI)/libiconv.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
LOCAL_EXPORT_LDLIBS :=
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := jsqlite
LOCAL_SRC_FILES := libs/$(TARGET_ARCH_ABI)/libjsqlite.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
LOCAL_EXPORT_LDLIBS := -lz
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := curl
LOCAL_SRC_FILES := libs/$(TARGET_ARCH_ABI)/libcurl.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
LOCAL_EXPORT_LDLIBS :=
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := gdal
LOCAL_SRC_FILES := libs/$(TARGET_ARCH_ABI)/libgdal.so
LOCAL_SHARED_LIBRARIES := jsqlite
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
LOCAL_EXPORT_LDLIBS := -lz
include $(PREBUILT_SHARED_LIBRARY)

How to use shared library without header files in Android?

I have a shared lib (ex. libcrypto.so), but don't have header files.
Can I use this lib in other module?
I tried to use LOCAL_EXPORT_C_INCLUDES to export header files, but It doesn't work.
This is prebuilt module:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := libcrypto
LOCAL_SRC_FILES := prebuilt/$(TARGET_ARCH_ABI)/libcrypto.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_SHARED_LIBRARY)
And, this is module used libcrypto:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_SRC_FILES += test.c # include "openssl/crypto.h"
LOCAL_C_INCLUDES += $(crypto_PATH)/include
LOCAL_SHARED_LIBRARIES += libcrypto
LOCAL_MODULE := libtest
LOCAL_MODULE_TAGS := optional
LOCAL_ARM_MODE := arm
LOCAL_PRELINK_MODULE := false
include $(BUILD_SHARED_LIBRARY)
This is libcrypto module (boringssl):
LOCAL_PATH := $(call my-dir)
# Target shared library
include $(CLEAR_VARS)
LOCAL_MODULE_TAGS := optional
LOCAL_MODULE := libcrypto
LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/src/include
LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk $(LOCAL_PATH)/crypto-sources.mk
LOCAL_SDK_VERSION := 9
LOCAL_CFLAGS += -fvisibility=hidden -DBORINGSSL_SHARED_LIBRARY -DBORINGSSL_IMPLEMENTATION -DOPENSSL_SMALL -Wno-unused-parameter
# sha256-armv4.S does not compile with clang.
LOCAL_CLANG_ASFLAGS_arm += -no-integrated-as
LOCAL_CLANG_ASFLAGS_arm64 += -march=armv8-a+crypto
include $(LOCAL_PATH)/crypto-sources.mk
include $(BUILD_SHARED_LIBRARY)
EDIT: Added boringssl module. I actually used #include "openssl/crypto.h" in test.c

Usually, you find crypto.h under include/openssl. So, in your case, either change the #include statement in test.c
#include "openssl/crypto.h"
Or (less recommended), edit
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include/openssl

How can i build shared and static library with the same name?

I want to build shared and static library with the same name but i have an error:
Android NDK: But this module was already defined by path/to/Android.mk
Android.mk:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := j
LOCAL_SRC_FILES := j.c
include $(BUILD_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := j
LOCAL_SRC_FILES := j.c
include $(BUILD_STATIC_LIBRARY)
I want to publish shared and static library.

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := j_shared
LOCAL_MODULE_FILENAME := libj
LOCAL_SRC_FILES := j.c
include $(BUILD_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := j
LOCAL_SRC_FILES := j.c
include $(BUILD_STATIC_LIBRARY)
Note that you should explicitly set the lib prefix, but should not provide the .so suffix.

how to generate two .so file in a single android.mk file

I'd like to create two .so file within a single .mk file. But the following codes fails because there should not be a space in LOCAL_MODULE. So is there a way out?
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := gpio hello-jni
LOCAL_CFLAGS := -Werror
LOCAL_SRC_FILES := gpio.c hello-jni.c
LOCAL_LDLIBS := -llog
include $(BUILD_SHARED_LIBRARY)

I just got it works using the following codes.
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := gpio
LOCAL_CFLAGS := -Werror
LOCAL_SRC_FILES := gpio.c
LOCAL_LDLIBS := -llog
include $(BUILD_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := h ello-jni
LOCAL_CFLAGS := -Werror
LOCAL_SRC_FILES := hello-jni.c
LOCAL_LDLIBS := -llog
include $(BUILD_SHARED_LIBRARY)