Using 3rd Party shared library on Android with NDK

Hello, I am trying to make an Android Plugin which uses FMOD for Android, using the NDK (I need this to be native because I am also using a third party open-source C++ library that needs to interact with FMOD, which works fine). I am able to compile everything with the NDK OK, but when I create my Unity project, I always get a DLLNotFoundException if I am using the FMOD shared lib. Note that the shared library that I created works fine if I do not include any FMOD calls, so I am pretty sure that the Unity player cannot find the FMOD shared libs.

This is my plugins code:

 extern "C" {
 #endif
 
     static int mycount = 0;
     int FooTest(){
         
         unsigned int version;
         FMOD::System* system_;
 
         //Init
         FMOD_RESULT result = FMOD::System_Create(&system_);
         if (result != FMOD_OK) return -1;
 
         result = system_->getVersion(&version);
         if (result != FMOD_OK) return -1;
 
         if (version < FMOD_VERSION)
         {
             //printf("Error!  You are using an old version of FMOD %08x.  This program requires %08x\n", version, FMOD_VERSION);
             return -1;
         }
         result = system_->init(32, FMOD_INIT_NORMAL, 0);
         if (result != FMOD_OK) return -1;
         
         return mycount++;
     }
 
 
 #ifdef __cplusplus
 }
 #endif

If I comment out all the FMOD stuff, the returned count is incremented and shown on screen. Whenever I build with the FMOD calls, I get the "DLLNotFoundException:FooTest"

I included the fmodex.so and fmodexL.so libraries both in my plugins/android directory and in the root of my project, and I have checked that they are present in the lib/armeabi folder of the generated APK.

If anyone is interested I can also post the Android makefiles I use to generate my shared library.