How to build executable ARM64-V8 program with OpenCL and fastcv for running on Android?

Question

I want to build a C++ program in arm64-v8a running on Android, which used OpenCL and fastCV. I can compile and work well when I use the armv7-a architecture. Please help me if you know how to figure it out

Application.mk:

APP_CPPFLAGS = -frtti -fexceptions
APP_ABI:= armeabi-v7a-hard
APP_STL:=gnustl_static

Android.mk:

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := libOpenCL32
LOCAL_SRC_FILES := ./prelibs/libs32/libOpenCL.so 
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE := libfastcvopt32
LOCAL_SRC_FILES := ./prelibs/libs32/libfastcvopt.so 
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
MY_SRC_LIST += $(wildcard ./*.cpp)
LOCAL_C_INCLUDES += ./
LOCAL_SRC_FILES += $(MY_SRC_LIST)

LOCAL_CPP_EXTENSION := .cxx .cpp .cc    
LOCAL_CPPFLAGS += -DSUPPORT_OMP -march=armv7-a -mfloat-abi=hard -mfpu=neon -fopenmp -fexceptions -fpermissive -Wno-literal-suffix -Wl,--no-as-needed -std=c++11 -O3 -Wl,  -hash-style=sysv
LOCAL_LDLIBS += -L./libs32
LOCAL_LDLIBS += -lm -lz -lc -llog -pie -fPIE  -fopenmp 
LOCAL_MODULE := testQcom
LOCAL_SHARED_LIBRARIES += libOpenCL32 libfastcvopt32 
include $(BUILD_EXECUTABLE)

When I compile the source code using the .mk like these, everything is ok, and program works well. But when I want to compile the program in arm64-v8a , errors occur.

The arm64-v8a Application.mk:

APP_CPPFLAGS = -frtti -fexceptions
APP_ABI:= arm64-v8a 
APP_STL:=gnustl_static

The arm64-v8a Android.mk:

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := libOpenCL64
LOCAL_SRC_FILES := ./prelibs/libs64/libOpenCL.so
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE := libfastcvopt64
LOCAL_SRC_FILES := ./prelibs/libs64/libfastcvopt.so
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
MY_SRC_LIST += $(wildcard ./*.cpp)
LOCAL_C_INCLUDES += ./
LOCAL_SRC_FILES += $(MY_SRC_LIST)

LOCAL_CPP_EXTENSION := .cxx .cpp .cc    
LOCAL_CPPFLAGS += -DSUPPORT_OMP -march=armv8-a -fopenmp -fexceptions -fpermissive -Wno-literal-suffix -Wl,--no-as-needed -std=c++11 -O3 -Wl,  -hash-style=sysv
LOCAL_LDLIBS += -L./libs64
LOCAL_LDLIBS += -lm -lz -lc -llog -pie -fPIE  -fopenmp 
LOCAL_MODULE := testQcom
LOCAL_SHARED_LIBRARIES += libOpenCL64 libfastcvopt64 
include $(BUILD_EXECUTABLE)

The error is:

[arm64-v8a] Executable : testQcom /home/liliming/Android/NDK/android-ndk-r10e/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/aarch64-linux-android/4.9/../../../../aarch64-linux-android/bin/ld: warning: libgsl.so, needed by .//obj/local/arm64-v8a/libOpenCL.so, not found (try using -rpath or -rpath-link) /home/liliming/Android/NDK/android-ndk-r10e/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/aarch64-linux-android/4.9/../../../../aarch64-linux-android/bin/ld: warning: libCB.so, needed by .//obj/local/arm64-v8a/libOpenCL.so, not found (try using -rpath or -rpath-link) /home/liliming/Android/NDK/android-ndk-r10e/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/aarch64-linux-android/4.9/../../../../aarch64-linux-android/bin/ld: warning: libcutils.so, needed by .//obj/local/arm64-v8a/libOpenCL.so, not found (try using -rpath or -rpath-link) /home/liliming/Android/NDK/android-ndk-r10e/toolchains/aarch64-linux-andr oid-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/aarch64-linux-android/4.9/../../../../aarch64-linux-android/bin/ld: warning: libc++.so, needed by .//obj/local/arm64-v8a/libOpenCL.so, not found (try using -rpath or -rpath-link) .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_end_perf_monitor_qcom' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_write_buffer' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_release_device' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to sleep@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_wait_for_events' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_migrate_mem_objects' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to exp@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_set_command_queue_property' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_platform_ids' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to cb_get_platform_ids' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to open@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_native_kernel' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to pthread_mutex_init@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_unmap_mem_object' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to memcmp@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_pipe_info' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_read_buffer' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_release_gl_objects' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to __cxa_atexit@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_release_perf_monitor_qcom' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_fill_buffer' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_program_with_binary' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_program_with_binary' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to os_strncmp' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_platform_info' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_gl_texture_info' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_retain_device' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to g_alogDebugMask' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to sin@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to dlopen@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_write_buffer_rect' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_sub_devices' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_release_mem_object' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_svm_mem_fill' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_acquire_egl_objects_khr' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_acquire_egl_objects_khr' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_release_context' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to __stack_chk_guard@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_set_mem_object_destructor_callback' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_barrier' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to sysconf@LIBC' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to atan@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_copy_buffer' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to strlen@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to dlerror@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_image3d' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_perf_monitor_qcom' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_unload_compiler' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_retain_context' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_retain_program' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_read_buffer_rect' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to puts@LIBC' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to strlcpy@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_kernel_arg_info' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to __register_atfork@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_sub_buffer' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_kernel_info' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to get_panel_settings' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to cos@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to os_alog' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_build_program' .//obj/local/arm64-v8a/libOpenC L.so: undefined reference to cb_create_pipe' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_marker' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_marker_with_wait_list' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_sync_obj_from_cl_event_qcom' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_svm_free' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to strtoul@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_retain_sampler' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_x_nd_range_kernel_qcom' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_copy_image_to_buffer' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_supported_image_formats' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to fclose@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_program_build_info' .//obj /local/arm64-v8a/libOpenCL.so: undefined reference to atoi@LIBC' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to strtol@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to dlsym@LIBC' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to __errno@LIBC' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to pthread_mutex_destroy@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_buffer' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to fread@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_buffer_from_image_qcom' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_gl_context_info_khr' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to acosf@LIBC' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to tan@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_retain_perf_monitor_qcom' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_program_with_builtinkernels' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to pthread_once@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_write_image' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to close@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_nd_range_kernel' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to snprintf@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_command_queue_with_properties' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to dlclose@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_from_gl_texture3d' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_from_egl_image_img' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_read_perf_monitor_qcom' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_copy_buffer_to_image' ./ /obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_task' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to pthread_detach@LIBC' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to ftell@LIBC' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to atan2@LIBC' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to strlcat@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_release_kernel' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_retain_mem_object' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to pclose@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_mem_object_info' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_event_profiling_info' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_set_event_callback' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to gettimeofday@LIBC' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to strnlen@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_map_buffer' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_event_info' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_from_gl_renderbuffer' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_from_gl_texture2d' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_command_queue_info' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_svm_alloc' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to __signbitf@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_read_image' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to printf@LIBC' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to pthread_mutex_lock@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_image' .//obj/local/arm64-v8a/libOpenCL.so: undefined referen ce to cb_get_kernel_work_group_info' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_kernels_in_program' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_perf_monitor_info_qcom' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_gl_object_info' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to fopen@LIBC' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to strcmp@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_common_unlock_global_mutex' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_compile_program' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to memcpy@LIBC' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to pthread_create@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_svm_memcpy' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to cosf@LIBC' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to memset@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_retain_command_queue' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to __stack_chk_fail@LIBC' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to free@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_finish' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_event_wait_for_submission_qcom' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to memchr@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_copy_buffer_rect' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to vsnprintf@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_set_perf_hint_qcom' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_device_ids' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_set_kernel_arg' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to fseek@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to fseek@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_copy_image' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_sampler_info' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_image_info' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_release_egl_objects_khr' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to log@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_map_image' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_svm_unmap' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to sinf@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to __cxa_finalize@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_release_sampler' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_kernel' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_program_info' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to cb_get_program_info' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to malloc@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_svm_map' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_flush' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_device_image_info_qcom' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_device_info' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to lrint@LIBC' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to popen@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_retain_event' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_from_gl_buffer' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to pthread_mutex_trylock@LIBC' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to strncmp@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_event_from_egl_sync_khr' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to pow@LIBC' .// obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_platform_compiler_unload' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to mmap@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_context_info' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_release_program' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to strrchr@LIBC' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to memalign@LIBC' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to fgets@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_from_gl_texture' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_image2d' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_program_with_source' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_sampler' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_begin_perf_monitor_qcom' .//obj/local/arm6 4-v8a/libOpenCL.so: undefined reference to cb_create_command_queue' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_svm_free' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_release_command_queue' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_perf_monitor_group_info_qcom' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to property_get' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_set_kernel_exec_info' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_from_egl_image_khr' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to ioctl@LIBC' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to exit@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_context_from_type' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to munmap@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_acquire_gl_objects' .//obj/local/arm64-v8a /libOpenCL.so: undefined reference to cb_get_kernel_sub_group_info_khr' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_barrier_with_wait_list' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_set_kernel_arg_svm_pointer' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_get_perf_monitor_counter_info_qcom' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_enqueue_fill_image' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_sampler_with_properties' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_retain_kernel' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to memmem@LIBC' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to read@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_wait_for_events' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to pthread_join@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_conte xt' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_link_program' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_set_user_event_status' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_common_lock_global_mutex' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_create_user_event' .//obj/local/arm64-v8a/libfastcvopt.so: undefined reference to pthread_mutex_unlock@LIBC' .//obj/local/arm64-v8a/libOpenCL.so: undefined reference to cb_release_event' collect2: error: ld returned 1 exit status make: *** [obj/local/arm64-v8a/testQcom] Error 1

Answer 1

When I modified one statement in the Android.mk like this:

LOCAL_LDLIBS += -fuse-ld=gold

Everything does work！