ASI SDK Help

jacob.m

Hello,

I was wondering if I could get some help with getting the SDK for ASI cams up and running.

My machine is running Fedora 28. I am very new to Linux operating systems (and quite a novice in programming as well), so quite likely this is a generic "Linux ignorance" problem...

I have downloaded the SDK package and unpacked it. The contents are in my home user directory (/home/<myuser>/ASI_linux_mac_SDK). I also have OpenCV installed on my computer (the whole goal of this exercise is to use some ASI120mm cams with OpenCV). In the /home/<myuser>/ASI_linux_mac_SDK/demo directory, I see two cpp programs and a Makefile (as well as a bin directory). If I run the make command, it gives me the following.

/usr/bin/ld: cannot find -lopencv_core /usr/bin/ld: cannot find -lopencv_highgui /usr/bin/ld: cannot find -lopencv_imgproc /usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-redhat-linux/8/libstdc++.so when searching for -lstd+++ /usr/bin/ld: cannot find -lstdc++ collect2: error: ld returned 1 exit status

make: *** Error 1

It seems like it's having trouble finding something in OpenCV. Looking at the Makefile, I see this line:

OPENCV = -lopencv_core -lopencv_highgui -lopencv_imgproc#$(shell pkg-config --cflags opencv) $(shell pkg-config --libs opencv) -I/usr/include/opencv2

Now, after some digging, I see that in the /usr/local/include directory, there is an opencv and opencv2. Going to opencv2, I see that there are directories for core, highgui, and imgproc. I tried changing the line in the Makefile from what it was to this:

OPENCV = -lopencv_core -lopencv_highgui -lopencv_imgproc#$(shell pkg-config --cflags opencv) $(shell pkg-config --libs opencv) -I/usr/local/include/opencv2

Basically just changing the -I/usr/include/opencv2 --> -I/usr/local/include/opencv2. I have no idea what that argument does, but changing it did not help. It was just a shot in the dark.

How do I resolve this? My apologies if this is something that is obvious.

Thanks,

Jacob

chad

Hi Jacob,

This should be caused by installing the 32-bit libraries required for compilation on a 64-bit system.

1,please install the 32-bit libs:

sudo apt-get install ia32-libs

sudo apt-get install lib32stdc++6

2,please check whether libstdc++. so exists in the /usr/lib32 or /usr/lib/ GCC /x86_64-linux-gnu/4.6/32/ directory. If not, please use the following command to generate it.

sudo ln -s libstdc++.so.6 libstdc++.so OR sudo ln -s ../../../../../lib32/i386-linux-gnu/libstdc++.so.6 libstdc++.so

After this, If it still wrong, please show me the new compile information.

Thanks

Chad

jacob.m

Thank you for your response.

Apparently on Fedora, things aren't as simple as those commands... which doesn't make things any easier on this Linux newbie. I did some internet digging and ended up running and getting back the following:


dnf install glibc.i686
Last metadata expiration check: 2 ago on Tue 19 Jun 2018 06 AM EDT.
Package glibc-2.27-15.fc28.i686 is already installed, skipping.
Dependencies resolved.
Nothing to do.
Complete!

As well as:


dnf install gtk3.i686

The above install without any problems.

Going to the /usr/lib directory, I did the following:


$ ls | grep stdc
libstdc++.so.6
libstdc++.so.6.0.25

So that seems to be ok. Going back to the demo and running make, the following happens:


/usr/bin/ld: cannot find -lopencv_core
/usr/bin/ld: cannot find -lopencv_highgui
/usr/bin/ld: cannot find -lopencv_imgproc

So the "/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-redhat-linux/8/libstdc++.so when searching for -lstd+++

/usr/bin/ld: cannot find -lstdc++" part is gone, but it still cannot find something in opencv. Is this still a 32 bit library problem?

Thanks,

Jacob

chad

Hi Jacob,

Can you search these libraries in your system? To make sure they had been installed correctly.

In general, the problem is either that there is no library file installed or that there is no correct link.

Like my last answer. The first step is to install the library file. The second step is linking.

Thanks

Chad

jacob.m

Chad,

Thank you for continuing to help me. I can see that these libraries are in the directory /usr/lib64, i.e.:


$ ls | grep opencv_core
libopencv_core.so.3.4
libopencv_core.so.3.4.1
$ ls | grep opencv_highgui
libopencv_highgui.so.3.4
libopencv_highgui.so.3.4.1
$ ls | grep opencv_imgproc
libopencv_imgproc.so.3.4
libopencv_imgproc.so.3.4.1

So, I think I have the libraries, so I think it's a linking issue? Now, in the /usr directory, there is a lib and a lib64 directory. Is this important? Is the linker looking in the lib directory instead of the lib64 directory? Or is this indicative of another problem?

Thanks,

Jacob

chad

try this command:

sudo ln -s /usr/lib64/libopencv_core.so.3.4 /usr/lib/libopencv_core.so

If it does not work, please copy the so file to your compile directory, and compile it.

Thanks

Chad

jacob.m

Chad,

Thanks for your help. I am good to go. I tried some different things, including changing the platform parameter in the Makefile. This was set as x86, which later in the Makefile any platform set as x86 gets passed a -m32 flag indicating 32 bit. My machine runs x86_64, a 64 bit operating system, so I changed the platform at the top of the Makefile to x64.

chad

OK, that's perfect~

Thanks

Chad