Android NDK and .so.X extensions

Issue

I'm trying to use the Grantlee library in an Android NDK app.

I can compile Grantlee just fine, and I get libGrantlee_Templates.so, libGrantlee_Templates.so.5, and libGrantlee_Templates.so.5.0.0.

Of these three, I can only install the first one in my Android.mk:

include $(CLEAR_VARS)
LOCAL_MODULE := libgrantlee
LOCAL_SRC_FILES := $(GRANTLEE_PATH)/lib/libGrantlee_Templates.so
include $(PREBUILT_SHARED_LIBRARY)

Because if I try to install either of the other two, then I get:

Android NDK: ERROR:Android.mk:grantlee: LOCAL_SRC_FILES should point to a file ending with ".so"
Android NDK: The following file is unsupported: libGrantlee_Templates.so.5

But then, like a cruel joke, the .so.5 that I can't install is exactly the file that it looks for at runtime:

E/AndroidRuntime(14439): java.lang.UnsatisfiedLinkError: dlopen failed: could not load library "libGrantlee_Templates.so.5"; caused by library "libGrantlee_Templates.so.5" not found

How do I solve this?

Solution

When you build a native shared library with NDK standalone toolchain, you must change its make files to get rid of .version suffixes. See for example how this is done for ffmpeg.

Answered By - Alex Cohn