Hi,
I am new to eclipse and opencv and I was trying to build a sample c++ code using Eclipse.
I have installed following packages.
rpm -qa | grep opencv
opencv-devel-3.4.4-10.fc30.x86_64
opencv-3.4.4-10.fc30.x86_64
opencv-core-3.4.4-10.fc30.x86_64
opencv-contrib-3.4.4-10.fc30.x86_64
00:29:09 **** Incremental Build of configuration Debug for project sample ****
make all
Building target: sample
Invoking: GCC C++ Linker
g++ -L/usr/lib64/ -L/usr/lib/ -o "sample" ./main.o -llibopencv_core.so.3.4 -llibopencv_core.so.3.4.4 -llibopencv_highgui.so.3.4 -llibopencv_highgui.so.3.4.4
libopencv_core.so.3.4 should be a symbolic link to libopencv_core.so.3.4.4, same for libopencv_highgui.so.3.4.
that's right
$ ls -l /usr/lib64/libopencv_core.so*
lrwxrwxrwx 1 root root 21 May 21 2019 /usr/lib64/libopencv_core.so -> libopencv_core.so.3.4
lrwxrwxrwx 1 root root 23 May 21 2019 /usr/lib64/libopencv_core.so.3.4 -> libopencv_core.so.3.4.4
-rwxr-xr-x 1 root root 4898472 May 21 2019 /usr/lib64/libopencv_core.so.3.4.4
$ ls -l /usr/lib64/libopencv_highgui.so*
lrwxrwxrwx 1 root root 24 May 21 2019 /usr/lib64/libopencv_highgui.so -> libopencv_highgui.so.3.4
lrwxrwxrwx 1 root root 26 May 21 2019 /usr/lib64/libopencv_highgui.so.3.4 -> libopencv_highgui.so.3.4.4
-rwxr-xr-x 1 root root 425512 May 21 2019 /usr/lib64/libopencv_highgui.so.3.4.4
Try:
g++ -o "sample" ./main.o -lopencv_core -lopencv_highgui
no errors
[danishka@2000 Debug]$ pwd
/home/danishka/workspace/sample/Debug
[danishka@2000 Debug]$ ls
main.d main.o makefile
objects.mk sources.mk subdir.mk[danishka@2000 Debug]$ g++ -o "sample" ./main.o -lopencv_core -lopencv_highgui
[danishka@2000 Debug]$ ls
main.d main.o makefile
objects.mk sample
sources.mk subdir.mk[danishka@2000 Debug]$ ls -l
total 124
-rw-rw-r-- 1 danishka danishka 20 Feb 7 00:26 main.d
-rw-rw-r-- 1 danishka danishka 54040 Feb 7 00:26 main.o
-rw-rw-r-- 1 danishka danishka 1318 Feb 7 00:29 makefile
-rw-rw-r-- 1 danishka danishka 337 Feb 7 00:29
objects.mk-rwxrwxr-x 1 danishka danishka 48224 Feb 7 09:19 sample
-rw-rw-r-- 1 danishka danishka 526 Feb 7 00:29
sources.mk-rw-rw-r-- 1 danishka danishka 708 Feb 7 00:29
subdir.mk
/usr/bin/ld: cannot find -llibopencv_core.so.3.4
/usr/bin/ld: cannot find -llibopencv_core.so.3.4.4
/usr/bin/ld: cannot find -llibopencv_highgui.so.3.4
/usr/bin/ld: cannot find -llibopencv_highgui.so.3.4.4
collect2: error: ld returned 1 exit status
make: *** [makefile:46: sample] Error 1
"make all" terminated with exit code 2. Build might be incomplete.
00:29:10 Build Failed. 5 errors, 0 warnings. (took 419ms)
$ locate opencv_core.so.3.4
/usr/lib64/libopencv_core.so.3.4
/usr/lib64/libopencv_core.so.3.4.4
I have already added /usr/lib64/ and /usr/lib/ as library search paths in eclipse.
Is there anything missing in my config?
Regards,
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