Linux OpenCV 靜態連接錯誤

錯誤一：

undefined reference to `dlopen'

undefined reference to `dlerror'

undefined reference to `dlsym'

對dlopen, dlerror, dlsym 未定義的引用， 缺乏連接庫， 連接時加上選項 -ldl

 

參考: 

1. http://blog.csdn.net/houjixin/article/details/8624581
2. http://stackoverflow.com/questions/29557683/undefined-reference-to-symbol-dlsymglibc-2-4

 

錯誤二：

對icvPuts, icvGets 未定義的引用，編譯錯誤以下：

./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

 

缺乏zlib庫引發的， 編譯連接時加上 -lz

參考：

1. http://stackoverflow.com/questions/10858055/opencv2-4-with-android-native-activity

 

總結： 相似的未定義的引用錯誤，應該都是因爲缺乏庫的緣由引發的， 靜態連接OpenCV庫的時候， 不只須要連接libopencv_***.a, 也須要 dl, zlib 等庫， 出現相似錯誤時， 直接Google 未定義引用的函數對應的庫， 而後在連接中添加上.