Reputation: 131
I have an Android project written in C++ and have a problem in linking phase. The code is put in some static libraries which should be linked together.
I have found a lot of questions and answers on the net about this topic and most of them suggest to put my libraries to LOCAL_STATIC_LIBRARIES
in the Android.mk file. But, if I do this, I found the content of LOCAL_STATIC_LIBRARIES
is simply ignored: my libraries are not linked, and adding any dummy text here does not generate any error or warning message.
I tried it this way:
LOCAL_STATIC_LIBRARIES := MyLib.a
or with full path:
LOCAL_STATIC_LIBRARIES := $(LOCAL_PATH)/MyLib.a
none of them worked.
If I put my static libraries to LOCAL_LDLIBS
then it is linked, but I got a warning message about non-system libraries are used, and probably the build will be wrong.
The content of my Android.mk file is:
LOCAL_LDLIBS := $(LOCAL_PATH)/MyLib.a ...
and I got this message:
Android NDK: WARNING:jni/Android.mk:myapp: non-system libraries in linker flags: jni/MyLib.a
Android NDK: This is likely to result in incorrect builds. Try using LOCAL_STATIC_LIBRARIES
Android NDK: or LOCAL_SHARED_LIBRARIES instead to list the library dependencies of the
Android NDK: current module
I could not find how to use LOCAL_STATIC_LIBRARIES
right way, please help me!
I have android-ndk-r9 and android-sdk_r22.2.1 on a OpenSuSE x86 and using target=android-18
Upvotes: 9
Views: 12881
Reputation: 2099
See JBL's answer here.
The LOCAL_STATIC_LIBRARIES variable does not work that way. First you need a section that defines the library you want to include:
include $(CLEAR_VARS)
LOCAL_PATH = .
LOCAL_MODULE := curl
LOCAL_EXPORT_C_INCLUDES := ../curl/include
LOCAL_SRC_FILES := ../curl/lib/libcurl.a
include $(PREBUILT_STATIC_LIBRARY)
THEN, you can include it using
include $(CLEAR_VARS)
LOCAL_MODULE = mylib
CFLAGS = ...
...
LOCAL_STATIC_LIBRARIES = curl
include $(BUILD_STATIC_LIBRARY)
Upvotes: 11
Reputation: 33
Most probably the problem lies in that you are giving the extension of the library:
LOCAL_STATIC_LIBRARIES := MyLib.a
I think, it should be written as:
LOCAL_STATIC_LIBRARIES := MyLib
Upvotes: 2