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我需要編譯一些c/C++代碼。使用NDK和Cygwin的工具，不止一次我想出了錯誤「undefined reference to」。大多數人都說這是由調用lib文件未包含在源文件中的函數引起的。但是，我對c/C++知之甚少，並且錯誤日誌也給出了模糊信息，所以我不知道哪個文件的哪一行會導致問題，甚至不知道我真的需要哪個lib文件。如何使錯誤日誌更詳細地關於未定義的參考
我的希望是，我找到了一些工具或一些方法來應對這樣的，所以我可以找出錯誤行或獲取有關該錯誤的一些更詳細的問題。
非常感謝。
Android.mk
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)
$ NDK/NDK-構建V = 1
$ $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" > ./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" >> ./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
AvatarSpeak.cpp
if (fImage != NULL && fPot != NULL) {
bool sucavi = Fap2Avi2D(str3, str5, str4, str1, str2, -1);
LOGI("sucess and exit!");
} else {
LOGI("unsucess and exit!");
}
Animation2D_new.h（頭文件，其中定義方法Fap2Avi2D）
#ifndef ANIMATION_2D_NEW_H_
#define ANIMATION_2D_NEW_H_
#include <vector>
#include <string>
#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);
...
嗨，亞歷克斯，在閱讀您的文章後，仍然無法找到處理我的問題的線索，所以我發佈了一些我的代碼，希望您能給我一些更詳細的解決方案。非常感謝。 – stardust
那麼，文件'Animation2D_new.h'用於聲明** Fap2Avi2D（）函數，但不會[** define **]（http://www.cprogramming.com/declare_vs_define.html）它。你可能有相應的'Animation2D_new.cpp'文件;你應該明確地將它添加到'LOCAL_SRC_FILES' –
再次感謝Alex，問題解決了。 – stardust