Question

我在arm-linux上使用Opencv-2.1。我正在使用arm-linux-g ++编译器。在链接期间我遇到了一个奇怪的错误。在谈论错误之前，我将发布我的make命令

CC = arm-linux-g++
COMPILEFLAGS = -Wall -fPIC -c -O2 -I./

OUT_DLL = libLensFinder.so
DLL_FLAGS = -shared -o
OBJS = SegmentRegions.o
OBJS2 = EdgeDetection.o
OBJS3 = AnalyseRegions.o
OBJS4 = global.o
LINK_FLAGS = -L./ -lLensFinder
LINK_FLAGS_2 = -L./ -lTwoX
INCPATH    = -I/home/zwang/ravi/opencv_include21/opencv/  -I.

all : 
$(CC) $(COMPILEFLAGS) $(INCPATH) global.cpp -o global.o
$(CC) $(COMPILEFLAGS) $(INCPATH) EdgeDetection.cpp -o EdgeDetection.o
$(CC) $(COMPILEFLAGS) $(INCPATH) SegmentRegions.cpp -o SegmentRegions.o
$(CC) $(COMPILEFLAGS) $(INCPATH) AnalyseRegions.cpp -o AnalyseRegions.o
$(CC) $(OBJS) $(OBJS2) $(OBJS3) $(OBJS4) $(DLL_FLAGS) ./$(OUT_DLL) -L/home/zwang/ravi/opencv_include21/lib -lcvaux -lcxcore -lhighgui -lcv -lml -lcxts -lrt

$(CC) $(COMPILEFLAGS) $(INCPATH) sample.cpp
#$(CC) $(LINK_FLAGS) sample.o -o sample 
$(CC) $(LINK_FLAGS) $(LINK_FLAGS_2) sample.o -o sample

一切正常，直到最后。在最后一个命令期间，即在创建可执行文件时，我收到以下错误。

arm-linux-g++ -L./ -lLensFinder -L./ -lTwoX sample.o -o sample
.//libLensFinder.so: undefined reference to `spotrs_'
.//libLensFinder.so: undefined reference to `cvGetOptimalDFTSize'
.//libLensFinder.so: undefined reference to `dgels_'
.//libLensFinder.so: undefined reference to `dgelsd_'
.//libLensFinder.so: undefined reference to `dgesdd_'
.//libLensFinder.so: undefined reference to `cvMulSpectrums'
.//libLensFinder.so: undefined reference to `sgesdd_'
.//libLensFinder.so: undefined reference to `sgetri_'
.//libLensFinder.so: undefined reference to `cvDFT'
.//libLensFinder.so: undefined reference to `dgesv_'
.//libLensFinder.so: undefined reference to `dgetrf_'
.//libLensFinder.so: undefined reference to `dsyevr_'
.//libLensFinder.so: undefined reference to `sgels_'
.//libLensFinder.so: undefined reference to `spotrf_'
.//libLensFinder.so: undefined reference to `sgetrf_'
.//libLensFinder.so: undefined reference to `dpotrf_'
.//libLensFinder.so: undefined reference to `dpotri_'
.//libLensFinder.so: undefined reference to `sgesv_'
.//libLensFinder.so: undefined reference to `ssyevr_'
.//libLensFinder.so: undefined reference to `dpotrs_'
.//libLensFinder.so: undefined reference to `sgelsd_'
.//libLensFinder.so: undefined reference to `spotri_'
.//libLensFinder.so: undefined reference to `dgetri_'
collect2: ld returned 1 exit status
make: *** [all] Error 1

两个未定义的引用是cvMulSpectrums' and cvGetOptimalDFTSize'，我猜这是由于opencv。我对其他未定义的引用一无所知。我想我已将每个图书馆联系起来。但还是无法理解如何解决这个问题。有什么建议？仅供参考，该代码正在开发Visual Studio。

Answer 1

这些符号在libopencv_core库文件中定义。

请注意命令arm-linux-g++ -L./ -lLensFinder -L./ -lTwoX sample.o -o sample如何不将示例与任何opencv库相关联，因此链接过程会抱怨它。

您可能应该调整构建以执行以下操作：

arm-linux-g++ sample.o -o sample -L./ -lLensFinder -L./ -lTwoX -L/home/zwang/ravi/opencv_include21/lib -lcvaux -lcxcore -lhighgui -lcv -lml -lcxts -lrt

未定义引用`cvGetOptimalDFTSize'

1 个答案: