Error when linking C executable to OpenCV
- by Ghilas BELHADJ
I'm compiling OpenCV under Ubuntu 13.10 using cMake.
i've already compiled c++ programs and they works well.
now i'm trying to compile a C file using this cMakeLists.txt
cmake_minimum_required (VERSION 2.8)
project (hello)
find_package (OpenCV REQUIRED)
add_executable (hello src/test.c)
target_link_libraries (hello ${OpenCV_LIBS})
here is the test.c file:
#include <stdio.h>
#include <stdlib.h>
#include <opencv/highgui.h>
int main (int argc, char* argv[])
{
IplImage* img = NULL;
const char* window_title = "Hello, OpenCV!";
if (argc < 2)
{
fprintf (stderr, "usage: %s IMAGE\n", argv[0]);
return EXIT_FAILURE;
}
img = cvLoadImage(argv[1], CV_LOAD_IMAGE_UNCHANGED);
if (img == NULL)
{
fprintf (stderr, "couldn't open image file: %s\n", argv[1]);
return EXIT_FAILURE;
}
cvNamedWindow (window_title, CV_WINDOW_AUTOSIZE);
cvShowImage (window_title, img);
cvWaitKey(0);
cvDestroyAllWindows();
cvReleaseImage(&img);
return EXIT_SUCCESS;
}
it returns me this error whene running cmake . then make to the project:
Linking C executable hello
/usr/bin/ld: CMakeFiles/hello.dir/src/test.c.o: undefined reference to symbol «lrint@@GLIBC_2.1»
/lib/i386-linux-gnu/libm.so.6: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
make[2]: *** [hello] Erreur 1
make[1]: *** [CMakeFiles/hello.dir/all] Erreur 2
make: *** [all] Erreur 2
