Makefile产生未定义的引用

Makefile produces undefined references

本文关键字：引用 未定义 Makefile      更新时间：2023-10-16

我得到以下错误:

//usr/local/lib/libsmfitting.so: undefined reference to `VO_FaceParts::VO_GetOneFacePart(unsigned int) const'
//usr/local/lib/libsmfitting.so: undefined reference to `cv::estimateRigidTransform(cv::_InputArray const&, cv::_InputArray const&, bool)'
collect2: error: ld returned 1 exit status

由这个makefile生成:

Cxx=g++
CXXFLAGS = -I/usr/local/include/opencv -I/usr/local/include/opencv2 -I/usr/local/include/vosm/smfitting -I/usr/local/include/vosm/smbuilding -I/usr/local/include/vosm/comalgs -I/usr/local/include/vosm/cvcommon -I/usr/local/include/vosm/ensembletraining -I/usr/local/include/vosm/featureextraction -I/usr/local/include/vosm/integraltransform -I/usr/local/include/vosm/utils
LIBS = -lopencv_ml -lopencv_calib3d -lopencv_legacy -lopencv_core -lopencv_highgui -lopencv_imgproc -lopencv_video -lopencv_objdetect -lcomalgs -lcvcommon -lensembletraining -lfeatureextraction -lintegraltransform -lsmbuilding -lutils -lboost_system -lboost_filesystem -lsmfitting
all: faceApp.cpp
    $(Cxx) -o faceApp faceApp.cpp $(CXXFLAGS) $(LIBS)

代码似乎是正确的，库似乎是正确构建的，我认为错误在于makefile。

链接时库的顺序很重要，并且应该是反向依赖顺序。因此，如果库B依赖库A，那么在链接时需要将B放在A之前。

在你的情况下，似乎smfitting库依赖于一个OpenCV库，以及其他一些库，所以你需要把它放在那些库之前。

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