Using Caffe2 library from PyTorch 1.2 build

C++
1

Hello, I’ve built PyTorch 1.2 from sources for Arch Linux. C++ programs written with use of libtorch.so can be compiled and linked without any errors. But I can’t link even a simple program for Caffe2 library(libcaffe2.so), because I’m getting errors:

/usr/bin/ld: /somepath/lib/libcaffe2.so: undefined reference to `c10::Device::validate()'
/usr/bin/ld: /somepath/lib/libcaffe2.so: undefined reference to `c10::ThreadPool::ThreadPool(unsigned long, int)'

My compilation command line looks like this one:

/usr/bin/g++  -msse3 -fopenmp -Wall -Wextra -Wno-unused-parameter -pthread -fopenmp -fPIC -ggdb -O0  -rdynamic main.cc.o  -o caffe2-load -Wl,-rpath,/somepath/lib /somepath/lib/libcaffe2.so /somepath/lib64/libprotobuf.a

I would appreciate for any help.

2

These sound like c10 functions, maybe you need to link in c10?

Best regards

Thomas

3

Thanks, for the suggestion, but linking with the c10 library doesn’t help.

4

I solved the problem. I modified the c10/core/Device.h and c10/core/Device.cpp files by moving the implementation of Device::validate method to the cpp file. Also I added additional constructor ThreadPool(std::size_t pool_size,int numa_node_id) to the class c10::ThreadPool. It seems that there are some inconsistency in the linkage options for the c10 library.