Android NDK Building Shared Module and including in Android.mk ----- 4

Mohan Krushna

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May 27, 2021, 3:18:43 PM5/27/21

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├───Common

│ └───ssl

│ ├───include

│ │ ├───crypto

│ │ ├───internal

│ │ └───openssl

│ └───libs

│ ├───arm64-v8a

│ ├───armeabi-v7a

│ ├───x86

│ └───x86_64

Android.mk -------------- (1)

├───GUI

└───SOURCE

├───Common

│ ├───inc

│ ├───JsonParseMts

│ │ ├───inc

│ │ └───src

Android.mk -------------- (2)

│ └───Utilities

│ ├───inc

│ └───src

Android.mk -------------- (3)

└───L4

├───GenMessage_Module

│ ├───inc

│ └───src

└───TxRx

├───inc

└───src

Android.mk -------------- (4)

Android.mk -------------- (1)

LOCAL_PATH := $(call my-dir)

MY_LOCAL_PATH := $(LOCAL_PATH)

include $(CLEAR_VARS)

# SSL

LOCAL_PATH := $(MY_LOCAL_PATH)/libs

LOCAL_MODULE := ssl

LOCAL_SRC_FILES := $(TARGET_ARCH_ABI)/libssl.so

LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include

include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)

# Crypto

LOCAL_PATH := $(MY_LOCAL_PATH)/libs

LOCAL_MODULE := crypto

LOCAL_SRC_FILES := $(TARGET_ARCH_ABI)/libcrypto.so

LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include

include $(PREBUILT_SHARED_LIBRARY)

Android.mk -------------- (2)

LOCAL_PATH := $(call my-dir)

MY_LOCAL_PATH := $(LOCAL_PATH)

include $(CLEAR_VARS)

# Gen Msg Json parser

LOCAL_PATH := $(MY_LOCAL_PATH)/src

LOCAL_LDLIBS := -llog

LOCAL_MODULE := jsonParseMts

LOCAL_SRC_FILES := cJSON.c jsonParseMts.c

LOCAL_C_INCLUDES := $(MY_LOCAL_PATH)

include $(BUILD_SHARED_LIBRARY)

Android.mk -------------- (4)

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

MY_LOCAL_PATH := $(LOCAL_PATH)

LOCAL_PATH := $(MY_LOCAL_PATH)/src

LOCAL_LDLIBS := -llog

LOCAL_MODULE := txrx

LOCAL_SRC_FILES := client.c CommonMsg.c

#LOCAL_SHARED_LIBRARIES := ssl crypto utilities jsonParseMts

LOCAL_C_INCLUDES := $(MY_LOCAL_PATH) $(MY_LOCAL_PATH)/../../../Common/ssl/include $(MY_LOCAL_PATH)/../../Common/JsonParseMts $(MY_LOCAL_PATH)/../../Common/Utilities

include $(BUILD_SHARED_LIBRARY)

MY_LOCAL_PATH := $(LOCAL_PATH)

include $(MY_LOCAL_PATH)/../../../../Common/ssl/Android.mk

MY_LOCAL_PATH := $(LOCAL_PATH)

include $(MY_LOCAL_PATH)/../../../Common/JsonParseMts/Android.mk

MY_LOCAL_PATH := $(LOCAL_PATH)

Error Logs :==

> Task :app:generateJsonModelDebug

BestApp5\app\src\main\c\SOURCE\L4\TxRx\Android.mk:17: BestApp5/app/src/main/c/SOURCE/L4/TxRx/src/../../../../Common/ssl/libs/../../../Common/JsonParseMts/Android.mk: No such file or directory

make: *** No rule to make target 'BestApp5/app/src/main/c/SOURCE/L4/TxRx/src/../../../../Common/ssl/libs/../../../Common/JsonParseMts/Android.mk'. Stop.

BestApp5\app\src\main\c\SOURCE\L4\TxRx\Android.mk:17: BestApp5/app/src/main/c/SOURCE/L4/TxRx/src/../../../../Common/ssl/libs/../../../Common/JsonParseMts/Android.mk: No such file or directory

make: *** No rule to make target 'BestApp5/app/src/main/c/SOURCE/L4/TxRx/src/../../../../Common/ssl/libs/../../../Common/JsonParseMts/Android.mk'. Stop.

BestApp5\app\src\main\c\SOURCE\L4\TxRx\Android.mk:17: BestApp5/app/src/main/c/SOURCE/L4/TxRx/src/../../../../Common/ssl/libs/../../../Common/JsonParseMts/Android.mk: No such file or directory

make: *** No rule to make target 'BestApp5/app/src/main/c/SOURCE/L4/TxRx/src/../../../../Common/ssl/libs/../../../Common/JsonParseMts/Android.mk'. Stop.

BestApp5\app\src\main\c\SOURCE\L4\TxRx\Android.mk:17: BestApp5/app/src/main/c/SOURCE/L4/TxRx/src/../../../../Common/ssl/libs/../../../Common/JsonParseMts/Android.mk: No such file or directory

make: *** No rule to make target 'BestApp5/app/src/main/c/SOURCE/L4/TxRx/src/../../../../Common/ssl/libs/../../../Common/JsonParseMts/Android.mk'. Stop.

> Task :app:generateJsonModelDebug FAILED

Execution failed for task ':app:generateJsonModelDebug'.

> executing external native build for ndkBuild BestApp5\app\src\main\c\SOURCE\L4\TxRx\Android.mk

Alias R. Cummins

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May 27, 2021, 6:10:11 PM5/27/21

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Could you explain the problem in a bit more detail?

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Ryan Prichard

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May 27, 2021, 6:21:25 PM5/27/21

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It's trying to include this path and failing:

BestApp5/app/src/main/c/SOURCE/L4/TxRx/src/../../../../Common/ssl/libs/../../../Common/JsonParseMts/Android.mk

This path doesn't exist. Simplified it's just:

BestApp5/app/src/main/c/Common/JsonParseMts/Android.mk

It should be:

BestApp5/app/src/main/c/SOURCE/Common/JsonParseMts/Android.mk

I don't think that "include" scopes make variables, so this code seems broken:

MY_LOCAL_PATH := $(LOCAL_PATH)
include $(MY_LOCAL_PATH)/../../../../Common/ssl/Android.mk
MY_LOCAL_PATH := $(LOCAL_PATH)
include $(MY_LOCAL_PATH)/../../../Common/JsonParseMts/Android.mk
MY_LOCAL_PATH := $(LOCAL_PATH)

I would expect the Common/ssl/Android.mk file to set both MY_LOCAL_PATH and LOCAL_PATH, so the attempt to reset MY_LOCAL_PATH (to $(LOCAL_PATH)) afterwards wouldn't actually reset it. Maybe you want to reset MY_LOCAL_PATH using this instead (before each of the include directives):

MY_LOCAL_PATH := $(call my-dir)

-Ryan

Dime Bar

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May 30, 2021, 3:20:55 AM5/30/21

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Hi,

$(MY_LOCAL_PATH)/../../../Common/ssl/include

Maybe this line is wrong ?

make: *** No rule to make target 'BestApp5/app/src/main/c/SOURCE/L4/TxRx/src/../../../../Common/ssl/libs/../../../Common/JsonParseMts/Android.mk'.

===

'BestApp5/app/src/main/Common/JsonParseMts/Android.mk'. ?

Stop.
BestApp5\app\src\main\c\SOURCE\L4\TxRx\Android.mk:17: BestApp5/app/src/main/c/SOURCE/L4/TxRx/src/../../../../Common/ssl/libs/../../../Common/JsonParseMts/Android.mk: No such file or directory
make: *** No rule to make target 'BestApp5/app/src/main/c/SOURCE/L4/TxRx/src/../../../../Common/ssl/libs/../../../Common/JsonParseMts/Android.mk'. Stop.
BestApp5\app\src\main\c\SOURCE\L4\TxRx\Android.mk:17: BestApp5/app/src/main/c/SOURCE/L4/TxRx/src/../../../../Common/ssl/libs/../../../Common/JsonParseMts/Android.mk: No such file or directory
make: *** No rule to make target 'BestApp5/app/src/main/c/SOURCE/L4/TxRx/src/../../../../Common/ssl/libs/../../../Common/JsonParseMts/Android.mk'. Stop.
BestApp5\app\src\main\c\SOURCE\L4\TxRx\Android.mk:17: BestApp5/app/src/main/c/SOURCE/L4/TxRx/src/../../../../Common/ssl/libs/../../../Common/JsonParseMts/Android.mk: No such file or directory
make: *** No rule to make target 'BestApp5/app/src/main/c/SOURCE/L4/TxRx/src/../../../../Common/ssl/libs/../../../Common/JsonParseMts/Android.mk'. Stop.

> Task :app:generateJsonModelDebug FAILED

Execution failed for task ':app:generateJsonModelDebug'.
> executing external native build for ndkBuild BestApp5\app\src\main\c\SOURCE\L4\TxRx\Android.mk

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Mohan Krushna

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May 30, 2021, 3:20:59 AM5/30/21

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Hy ryan & cummins

I am trying to build shared library in different folder and trying to connect in android.mk ------(4) as it required the library these ssl crypto island libs are i have build standalone it was successful.but when i am trying to integrate its failing.

This is my complete android.mk(4) files ----------------

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
MY_LOCAL_PATH := $(LOCAL_PATH)

LOCAL_PATH := $(MY_LOCAL_PATH)/src
LOCAL_LDLIBS := -llog
LOCAL_MODULE := txrx
LOCAL_SRC_FILES := client.c CommonMsg.c

#LOCAL_SHARED_LIBRARIES :=ssl crypto utilities jsonParseMts


LOCAL_C_INCLUDES := $(MY_LOCAL_PATH) $(MY_LOCAL_PATH)/../../../Common/ssl/include $(MY_LOCAL_PATH)/../../Common/JsonParseMts $(MY_LOCAL_PATH)/../../Common/Utilities
include $(BUILD_SHARED_LIBRARY)

LOCAL_PATH := $(call my-dir)
MY_LOCAL_PATH := $(LOCAL_PATH)

include $(MY_LOCAL_PATH)/../../../../Common/ssl/Android.mk


LOCAL_PATH := $(call my-dir)
MY_LOCAL_PATH := $(LOCAL_PATH)

include $(MY_LOCAL_PATH)/../../../Common/JsonParseMts/Android.mk
MY_LOCAL_PATH := $(LOCAL_PATH)

Now its redirecting to /ndk/21.1.6352462/build//../build/core/

---------------------------------------------------------------

> Task :app:generateJsonModelDebug FAILED
D:\Work\CDAC\SVN\MohanKB\Java_Workspace\BestApp5\app\src\main\c\SOURCE\L4\TxRx\Android.mk:18: C:/Users/beher/AppData/Local/Android/Sdk/ndk/21.1.6352462/build//../build/core/../../../Common/JsonParseMts/Android.mk: No such file or directory
make: *** No rule to make target 'C:/Users/beher/AppData/Local/Android/Sdk/ndk/21.1.6352462/build//../build/core/../../../Common/JsonParseMts/Android.mk'. Stop.
D:\Work\CDAC\SVN\MohanKB\Java_Workspace\BestApp5\app\src\main\c\SOURCE\L4\TxRx\Android.mk:18: C:/Users/beher/AppData/Local/Android/Sdk/ndk/21.1.6352462/build//../build/core/../../../Common/JsonParseMts/Android.mk: No such file or directory
make: *** No rule to make target 'C:/Users/beher/AppData/Local/Android/Sdk/ndk/21.1.6352462/build//../build/core/../../../Common/JsonParseMts/Android.mk'. Stop.
D:\Work\CDAC\SVN\MohanKB\Java_Workspace\BestApp5\app\src\main\c\SOURCE\L4\TxRx\Android.mk:18: C:/Users/beher/AppData/Local/Android/Sdk/ndk/21.1.6352462/build//../build/core/../../../Common/JsonParseMts/Android.mk: No such file or directory
make: *** No rule to make target 'C:/Users/beher/AppData/Local/Android/Sdk/ndk/21.1.6352462/build//../build/core/../../../Common/JsonParseMts/Android.mk'. Stop.
D:\Work\CDAC\SVN\MohanKB\Java_Workspace\BestApp5\app\src\main\c\SOURCE\L4\TxRx\Android.mk:18: C:/Users/beher/AppData/Local/Android/Sdk/ndk/21.1.6352462/build//../build/core/../../../Common/JsonParseMts/Android.mk: No such file or directory
make: *** No rule to make target 'C:/Users/beher/AppData/Local/Android/Sdk/ndk/21.1.6352462/build//../build/core/../../../Common/JsonParseMts/Android.mk'. Stop.

Execution failed for task ':app:generateJsonModelDebug'.

> executing external native build for ndkBuild D:\Work\CDAC\SVN\MohanKB\Java_Workspace\BestApp5\app\src\main\c\SOURCE\L4\TxRx\Android.mk

Thanks & regard

Mohan

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Alias R. Cummins

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Jun 1, 2021, 9:02:16 PM6/1/21

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Unfortunately because of legacy limitations of the Windows file system this question is too difficult for me this early in the morning.

A

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Alias R. Cummins

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Jun 1, 2021, 9:02:16 PM6/1/21

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I suggest building on Linux or OS X.

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Ryan Prichard

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Jun 3, 2021, 5:34:10 PM6/3/21

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Sorry, using $(call my-dir) multiple times isn't going to work either.

https://developer.android.com/ndk/guides/android_mk might be helpful if you haven't found it already. It points out for my-dir:

Due to the way GNU Make works, what this macro really returns is the path of the last makefile that the build system included when parsing the build scripts. For this reason, you should not call my-dir after including another file.

Maybe try import-module? The NDK itself uses that to include Android.mk files from other Android.mk files. e.g.:

android/ndk_helper includes android/cpufeatures:

- https://android.googlesource.com/platform/ndk/+/refs/heads/master/sources/android/ndk_helper/Android.mk

- https://android.googlesource.com/platform/ndk/+/refs/heads/master/sources/android/cpufeatures/Android.mk

For your project, I'm not sure what the root directory for import-module is.

llvm-project/libcxx/Android.mk also shows the use of import-add-path to add directories to the search path used by import-module:

- https://android.googlesource.com/toolchain/llvm-project/+/refs/heads/ndk/libcxx/Android.mk#190

- https://android.googlesource.com/toolchain/llvm-project/+/refs/heads/ndk/libcxxabi/Android.mk

It seems import-add-path isn't documented, but import-module is.

-Ryan

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Mohan Krushna

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Jun 8, 2021, 10:20:27 PM6/8/21

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yeah i got the solution i have divided the includes path into multiple variables and works fine

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Thank You,
Mohan Krushna Behera,
Project Associates,
CDAC,NOIDA.

Mobile: (+91) 7537870782 Email: mohankrus...@cdac.in

For assimilation and dissemination of knowledge, visit cakes.cdac.in

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