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POHow to make error log more detailed about undefined reference to
 

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  1. POHow to make error log more detailed about undefined reference to
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    <p>I need to compile some c/c++ code. Using the tools of NDK and Cygwin, more than one time I have come up with the error "undefined reference to". Most guys said that it is caused by invoking a function whose lib file isn't included in your source file. However, I know little about c/c++, and also the error log gives fuzzy info so I can not know in which file which line cause the problem, not even know which lib file it is that I really need.</p> <p>My hope is that I find some tools or some ways to deal with problems like this so I can locate the error line or get some more detail about the error.</p> <p>Thanks a lot.</p> <p><strong>Android.mk</strong></p> <pre><code>LOCAL_PATH:= $(call my-dir) include $(CLEAR_VARS) include ../includeOpenCV.mk ifeq ("$(wildcard $(OPENCV_MK_PATH))","") #try to load OpenCV.mk from default install location include $(TOOLCHAIN_PREBUILT_ROOT)/user/share/OpenCV/OpenCV.mk else include $(OPENCV_MK_PATH) endif LOCAL_MODULE:=AvatarSpeak LOCAL_SRC_FILES:=AvatarSpeak.cpp LOCAL_LDLIBS := -llog include $(BUILD_SHARED_LIBRARY) </code></pre> <p><strong>$NDK/ndk-build V=1</strong></p> <pre><code>$ $NDK/ndk-build V=1 rm -f ./libs/armeabi/lib*.so ./libs/armeabi-v7a/lib*.so ./libs/mips/lib*.so ./libs/x86/lib*.so rm -f ./libs/armeabi/gdbserver ./libs/armeabi-v7a/gdbserver ./libs/mips/gdbserver ./libs/x86/gdbserver rm -f ./libs/armeabi/gdb.setup ./libs/armeabi-v7a/gdb.setup ./libs/mips/gdb.setup ./libs/x86/gdb.setup Gdbserver : [arm-linux-androideabi-4.6] libs/armeabi/gdbserver mkdir -p ./libs/armeabi install -p /cygdrive/d/android-ndk-r8b/prebuilt/android-arm/gdbserver/gdbserver ./libs/armeabi/gdbserver Gdbsetup : libs/armeabi/gdb.setup mkdir -p ./libs/armeabi echo "set solib-search-path ./obj/local/armeabi" &gt; ./libs/armeabi/gdb.setup echo "directory D:/android-ndk-r8b/platforms/android-14/arch-arm/usr/include "../../OpenCV-2.3.1/share/OpenCV/../../include/opencv" "../../OpenCV- 2.3.1/share/OpenCV/../../include" D:/android-ndk-r8b/sources/cxx-stl/gnu- libstdc++/4.6/include D:/android-ndk-r8b/sources/cxx-stl/gnu- libstdc++/4.6/libs/armeabi/include jni" &gt;&gt; ./libs/armeabi/gdb.setup SharedLibrary : libAvatarSpeak.so /cygdrive/d/android-ndk-r8b/toolchains/arm-linux-androideabi- 4.6/prebuilt/windows/bin/arm-linux-androideabi-g++ -Wl,-soname,libAvatarSpeak.so -shared --sysroot=D:/android-ndk-r8b/platforms/android-14/arch-arm ./obj/local/armeabi/objs- debug/AvatarSpeak/com_huawei_avatar_AvatarSpeak.o ./obj/local/armeabi/libopencv_contrib.a ./obj/local/armeabi/libopencv_calib3d.a ./obj/local/armeabi/libopencv_objdetect.a ./obj/local/armeabi/libopencv_features2d.a ./obj/local/armeabi/libopencv_video.a ./obj/local/armeabi/libopencv_imgproc.a ./obj/local/armeabi/libopencv_highgui.a ./obj/local/armeabi/libopencv_ml.a ./obj/local/armeabi/libopencv_legacy.a ./obj/local/armeabi/libopencv_flann.a ./obj/local/armeabi/libopencv_core.a ./obj/local/armeabi/libopencv_androidcamera.a ./obj/local/armeabi/liblibjpeg.a ./obj/local/armeabi/liblibpng.a ./obj/local/armeabi/liblibtiff.a ./obj/local/armeabi/liblibjasper.a ./obj/local/armeabi/libzlib.a ./obj/local/armeabi/libgnustl_static.a -Wl,--no-undefined -Wl,-z,noexecstack -Wl,- z,relro -Wl,-z,now -LD:/android-ndk-r8b/platforms/android-14/arch-arm/usr/lib -llog -lc - lm -o obj/local/armeabi/libAvatarSpeak.so ./obj/local/armeabi/objs-debug/AvatarSpeak/AvatarSpeak.o: In function `Java_com_hachi_avatar_AvatarSpeak_speak': D:\eclipse_workspace\TestSo/jni/com_hachi_avatar_AvatarSpeak.cpp:52: undefined reference to `Fap2Avi2D(char const*, char const*, char const*, char const*, char const*, int)' collect2: ld returned 1 exit status /cygdrive/d/android-ndk-r8b/build/core/build-binary.mk:378: recipe for target `obj/local/armeabi/libAvatarSpeak.so' failed make: *** [obj/local/armeabi/libAvatarSpeak.so] Error 1 </code></pre> <p><strong>AvatarSpeak.cpp</strong></p> <pre><code>if (fImage != NULL &amp;&amp; fPot != NULL) { bool sucavi = Fap2Avi2D(str3, str5, str4, str1, str2, -1); LOGI("sucess and exit!"); } else { LOGI("unsucess and exit!"); } </code></pre> <p><strong>Animation2D_new.h</strong>(the head file where define the method <strong>Fap2Avi2D</strong>)</p> <pre><code>#ifndef ANIMATION_2D_NEW_H_ #define ANIMATION_2D_NEW_H_ #include &lt;vector&gt; #include &lt;string&gt; #include "public.h" #include "FaceExpressionEditor.h" //#define __declspec(dllexport) bool Fap2Avi2D(const char *fap_file,const char *avi_file,const char *wav_file, const char* image_file,const char *pot_file=NULL,int codec_type=-1); ... </code></pre>
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