Using 3rd party library functions in kernel

[Benjam1n]

Hello,

I was wondering if I could use the C++ library PcapPlusPlus in my SYCL Code. I would like to dissect packets in a pcap file with SYCL on a FPGA. On the Host it has worked but not for the Kernels, so I was wondering if this even possible?

I downloaded the Github repository and built the files for my CentOS Stream 8 and could integrate the CMake parameters necessary in the vector-add project, so it would work properly. I tested it by using the Tutorial which reads a pcap file and outputs IPv4 addresses. When trying to offload this on my FPGA device, it causes an error, that the identifier "pcapp" was not declared, seemingly not knowing about the library.

PcapPlusPlus is not a header-only library, so I figured this could get more complex.

I am aware of the SYCL_EXTERNAL Macro but I'm non sure if/how this would work, if I change the functions of PcapPlusPlus like this.

For example, this code snippet does not work and throws and "undeclared identifier 'pcapp'" error when it does work fine outside the kernel:

q.submit([&](sycl::handler& cgh) {
        cgh.single_task([=]() {
            pcpp::RawPacket rawPacket;

I am using:

* pcapplusplus-23.09

* CentOS Stream 8

* oneAPI Base Toolkit 2023.1

What can I do? Thanks for any help.

[Alex_Y_Intel · Accepted solution]

No, unfortunately you cannot use 3rd party library directly in the device code.