错误一:
undefined reference to `dlopen‘
undefined reference to `dlerror‘
undefined reference to `dlsym‘
对dlopen, dlerror, dlsym 未定义的引用, 缺少链接库, 链接时加上选项 -ldl
参考:
- http://blog.csdn.net/houjixin/article/details/8624581
- http://stackoverflow.com/questions/29557683/undefined-reference-to-symbol-dlsymglibc-2-4
错误二:
对icvPuts, icvGets 未定义的引用,编译错误如下:
./obj/local/armeabi-v7a/libopencv_core.a(persistence.cpp.o): In function `icvPuts(CvFileStorage*, char const*)‘: persistence.cpp:(.text._ZL7icvPutsP13CvFileStoragePKc+0x20): undefined reference to `gzputs‘ ./obj/local/armeabi-v7a/libopencv_core.a(persistence.cpp.o): In function `icvGets(CvFileStorage*, char*, int)‘: persistence.cpp:(.text._ZL7icvGetsP13CvFileStoragePci+0x26): undefined reference to `gzgets‘ ./obj/local/armeabi-v7a/libopencv_core.a(persistence.cpp.o): In function `icvXMLSkipSpaces(CvFileStorage*, char*, int)‘: persistence.cpp:(.text._ZL16icvXMLSkipSpacesP13CvFileStoragePci+0x1e2): undefined reference to `gzgets‘ persistence.cpp:(.text._ZL16icvXMLSkipSpacesP13CvFileStoragePci+0x208): undefined reference to `gzeof‘ persistence.cpp:(.text._ZL16icvXMLSkipSpacesP13CvFileStoragePci+0x33c): undefined reference to `gzeof‘ ./obj/local/armeabi-v7a/libopencv_core.a(persistence.cpp.o): In function `_ZL16icvYMLSkipSpacesP13CvFileStoragePcii.clone.3‘: persistence.cpp:(.text._ZL16icvYMLSkipSpacesP13CvFileStoragePcii.clone.3+0x124): undefined reference to `gzgets‘ persistence.cpp:(.text._ZL16icvYMLSkipSpacesP13CvFileStoragePcii.clone.3+0x170): undefined reference to `gzeof‘ /cygdrive/d/soft/NVPACK/android-ndk-r7c/build/core/build-binary.mk:366: recipe for target `obj/local/armeabi-v7a/libnative-activity.so‘ failed persistence.cpp:(.text._ZL16icvYMLSkipSpacesP13CvFileStoragePcii.clone.3+0x28e): undefined reference to `gzeof‘ ./obj/local/armeabi-v7a/libopencv_core.a(persistence.cpp.o): In function `cvReleaseFileStorage‘: persistence.cpp:(.text.cvReleaseFileStorage+0x24): undefined reference to `gzclose‘ ./obj/local/armeabi-v7a/libopencv_core.a(persistence.cpp.o): In function `cvOpenFileStorage‘: persistence.cpp:(.text.cvOpenFileStorage+0x66e): undefined reference to `gzopen‘ persistence.cpp:(.text.cvOpenFileStorage+0x8fc): undefined reference to `gzclose‘ persistence.cpp:(.text.cvOpenFileStorage+0xaea): undefined reference to `gzrewind‘ persistence.cpp:(.text.cvOpenFileStorage+0xbee): undefined reference to `gzrewind‘ persistence.cpp:(.text.cvOpenFileStorage+0xc0a): undefined reference to `gzclose‘ collect2: ld returned 1 exit status
缺少zlib库引起的, 编译链接时加上 -lz
参考:
总结: 类似的未定义的引用错误,应该都是由于缺少库的原因引起的, 静态链接OpenCV库的时候, 不仅需要链接libopencv_***.a, 也需要 dl, zlib 等库, 出现类似错误时, 直接Google 未定义引用的函数对应的库, 然后在链接中添加上.
时间: 2024-10-10 11:07:35