Question

我一直在尝试编译包含OpenCV库的共享库。我的示例android make文件如下：

LOCAL_PATH := (call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := libopencvXXX
LOCAL_SRC_FILES := libs/opencv/libopencvXXX.a
include $(PREBUILT_STATIC_LIBRARY)

OPENCV_LIB_TYPE := STATIC
OPENCV_INSTALL_MODULES := on
OPENCV_CAMERA_MODULES := on

LOCAL_MODULE := libXXX
LOCAL_CPPFLAGS := -std=c++11 -fexceptions
LOCAL_CPP_FEATURES += exceptions
LOCAL_CFLAGS := -std=gnu++11 -fexceptions
LOCAL_LDLIBS := -llog -ldl

LOCAL_SRC_FILES := XXX.cpp
LOCAL_C_INCLUDES := <path to opencv header files>

LOCAL_STATIC_LIBRARIES := stdc++
LOCAL_STATIC_LIBRARIES += libopencvXXX

include $(BUILD_SHARED_LIBRARY)

然而，它一直在抛出错误：

[INFO] jni/libs/opencv/libopencv_core.a(persistence.cpp.o):persistence.cpp:function icvGets(CvFileStorage*, char*, int): error: undefined reference to 'gzgets'
[INFO] jni/libs/opencv/libopencv_core.a(persistence.cpp.o):persistence.cpp:function icvXMLSkipSpaces(CvFileStorage*, char*, int): error: undefined reference to 'gzeof'

我尝试了以下几个选项。

LOCAL_LDLIBS += -lz
LOCAL_LDLIBS += -L<NDK root>/platforms/android-19/arch-arm/usr/lib -lz

但没有任何帮助。有人知道如何解决这个问题吗？

编辑：忘记添加，当我添加以上两个选项（包括'-lz'）时，它会抛出错误，说“找不到本机编译库，本机编译成功完成！”。

Answer 1

我发现了这个问题。我应该添加

包括$（CLEAR_VARS）

包含所有静态库之后。以下是更正后的Android.mk

LOCAL_PATH := (call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := libopencvXXX
LOCAL_SRC_FILES := libs/opencv/libopencvXXX.a
include $(PREBUILT_STATIC_LIBRARY)

include $(CLEAR_VARS)

OPENCV_LIB_TYPE := STATIC
OPENCV_INSTALL_MODULES := on
OPENCV_CAMERA_MODULES := on

LOCAL_MODULE := libXXX
LOCAL_CPPFLAGS := -std=c++11 -fexceptions
LOCAL_CPP_FEATURES += exceptions
LOCAL_CFLAGS := -std=gnu++11 -fexceptions
LOCAL_LDLIBS := -llog -ldl

LOCAL_SRC_FILES := XXX.cpp
LOCAL_C_INCLUDES := <path to opencv header files>

LOCAL_STATIC_LIBRARIES := stdc++
LOCAL_STATIC_LIBRARIES += libopencvXXX

include $(BUILD_SHARED_LIBRARY)

OpenCV / NDK - zlib编译android makefile中的问题

1 个答案: