I have been trying, unsuccessfully, to compile my c program for using openCV on the linux-based operating system run on Raspberry Pi, Raspbian. The goal is to interface with the RPi camera, incorporating OpenCV. I have searched similar errors but only found mentions of C++ programs with this specific problem. I do not want this in C++, I want to solve the problem using C programming.
**I am compiling a file ending in .c with the following command in the linux LXTerminal:**
gcc -o testcode testcode.c
**I repeatedly get the follow errors:**
> /tmp/cclhjysk.o: In function> `cvDecRefData':> testcode.c:(.text+0xe84): undefined> reference to `cvFree_'> testcode.c:(.text+0xf2c): undefined> reference to `cvFree_'> /tmp/cclhjysk.o: In function> `cvGetRow': testcode.c:(.text+0x10c4):> undefined reference to `cvGetRows'> /tmp/cclhjysk.o: In function> `cvGetCol': testcode.c:(.text+0x1104):> undefined reference to `cvGetCols'> /tmp/cclhjysk.o: In function> `cvReleaseMatND':> testcode.c:(.text+0x112c): undefined> reference to `cvReleaseMat'> /tmp/cclhjysk.o: In function `cvSubS':> testcode.c:(.text+0x12f8): undefined> reference to `cvAddS' /tmp/cclhjysk.o:> In function `cvCloneSeq':> testcode.c:(.text+0x1344): undefined> reference to `cvSeqSlice'> /tmp/cclhjysk.o: In function> `cvSetNew': testcode.c:(.text+0x13cc):> undefined reference to `cvSetAdd'> /tmp/cclhjysk.o: In function> `cvGetSetElem':> testcode.c:(.text+0x149c): undefined> reference to `cvGetSeqElem'> /tmp/cclhjysk.o: In function> `cvReadIntByName':> testcode.c:(.text+0x1584): undefined> reference to `cvGetFileNodeByName'> /tmp/cclhjysk.o: In function> `cvReadRealByName':> testcode.c:(.text+0x1670): undefined> reference to `cvGetFileNodeByName'> /tmp/cclhjysk.o: In function> `cvReadStringByName':> testcode.c:(.text+0x1718): undefined> reference to `cvGetFileNodeByName'> /tmp/cclhjysk.o: In function> `cvReadByName':> testcode.c:(.text+0x1764): undefined> reference to `cvGetFileNodeByName'> testcode.c:(.text+0x1778): undefined> reference to `cvRead' /tmp/cclhjysk.o:> In function `cvContourPerimeter':> testcode.c:(.text+0x17c0): undefined> reference to `cvArcLength'> /tmp/cclhjysk.o: In function> `cvCalcHist':> testcode.c:(.text+0x1800): undefined> reference to `cvCalcArrHist'> /tmp/cclhjysk.o: In function> `cvEllipseBox':> testcode.c:(.text+0x1908): undefined> reference to `cvEllipse'> /tmp/cclhjysk.o: In function `cvFont':> testcode.c:(.text+0x1970): undefined> reference to `cvInitFont'> /tmp/cclhjysk.o: In function `main':> testcode.c:(.text+0x1a0c): undefined> reference to `cvCreateCameraCapture'> testcode.c:(.text+0x1a20): undefined> reference to `SetCaptureProperty'> testcode.c:(.text+0x1a30): undefined> reference to `SetCaptureProperty'> testcode.c:(.text+0x1a40): undefined> reference to `SetCaptureProperty'> testcode.c:(.text+0x1a50): undefined> reference to `SetCaptureProperty'> testcode.c:(.text+0x1a70): undefined> reference to `cvRetrieveFrame'> testcode.c:(.text+0x1a7c): undefined> reference to `cvGrabFrame'> testcode.c:(.text+0x1a90): undefined> reference to `cvGrabFramed' collect2:> ld returned 1 exit status
I have searched through my RPi for files with mention of cvFree and have been unable to locate them, so I'm thinking that I might be missing a step in the download or excluding a header.
**I have the following header files:**
> stdlib.h> stdio.h> math.h> opencv/cv.h> opencv/highgui.h> opencv/cvaux.h
Note: All the include statements are preceded with a pound/hashtag and the word "include," in addition to being surrounded by "<>" brackets.
***I use the following calls (*variable types only included in parameters listed):***
cvCaptureFromCAM(0)
SetCaptureProperty(CvCapture*, CV_CAP_PROP_FPS, #)
cvGrabFrame(CvCapture* )
cvRetrieveFrame(CvCapture* )
Please let me know if you have any feedback, I appreciate it!
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