How to use ndk-build build the source files in different folders?

Question

I know that to build so file, I should put the source file in /jni/ folder. But how can I build separate so in different folders.

For example, the structure of my project:

/jni/Android.mk
/jni/submodule1/Android.mk
/jni/submodule1/sub1.c
/jni/submodule2/Android.mk
/jni/submodule2/sub2.c

I have tried to write this in Android.mk in the top level:

$(LOCAL_PATH) :=$(call all-makefiles-under)

then wrote make info in Android.mk in submodule

the error is:

ndk-build 
make: *** No rule to make target `/home/../workspace/jni/sub.c', needed b
y `/home/../workspace/obj/local/armeabi/objs/submodule/sub.o'.  Stop.

Can someone give me a solution? Thank you!

Update 1: The code of Android.mk in submoudle:

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

 LOCAL_SRC_FILES := sub.c 

 LOCAL_C_INCLUDES := $(LOCAL_PATH)

 LOCAL_MODULE := sub
 LOCAL_LDLIBS := -ldl -llog
 LOCAL_STATIC_LIBRARIES := libc

 LOCAL_MODULE_PATH := $(TARGET_OUT_OPTIONAL_EXECUTABLES)
 LOCAL_MODULE_TAGS := debug
 include $(BUILD_EXECUTABLE)

SOLVED:

I should use ndk-build in the root directory, but not in jni directory. Thanks all of you!

@user2359247 Yes, I have added the Android.mk in the submodule. And it contains the build info. Update the Android in the submodule. — Bob Sun
– Bob Sun, Commented Aug 13, 2013 at 11:50
why don't you just use "include $(LOCAL_PATH)/submodule1/Android.mk" in your main Android.mk inside main module? — eozgonul
– eozgonul, Commented Aug 13, 2013 at 12:44

dharmendra · Accepted Answer · 2013-08-13 11:49:52Z

1

You should try include $(call all-subdir-makefiles) rather then $(LOCAL_PATH) :=$(call all-makefiles-under) in main Android.mk and make folder under jni folder with there separate c files and Android.mk files

answered Aug 13, 2013 at 11:49

dharmendra

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4 Comments

Bob Sun Over a year ago

I have tried the all-subdir-makefiles. The errors also appeared. I have updated the Android.mk in subfolder. Is there anything wrong with the Android.mk?

dharmendra Over a year ago

@Bob are you using MAC or Linux ?

dharmendra Over a year ago

check whether you have given Read-Write permission to your project folder .

Bob Sun Over a year ago

Yes, I have RW permission.

Shamim Ahmmed · Accepted Answer · 2013-08-13 11:42:02Z

0

Have you tried something like:

LOCAL_PATH := $(call my-dir)
LOCAL_SRC_FILES := /submodule1/sub1.c

edited Aug 13, 2013 at 11:42

answered Aug 13, 2013 at 11:31

Shamim Ahmmed

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2 Comments

Bob Sun Over a year ago

make: *** No rule to make target /home/../workspace/jni/submodule//submodule/sub.c', needed b y /home/../workspace/obj/local/armeabi/objs//submodule/sub.o'. Stop.

Shamim Ahmmed Over a year ago

Could you please try this one

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