cxxopts will cause problems in several scenarios

[zhiqwang]

🐛 Bug

When I run the code from https://github.com/yasenh/libtorch-yolov5.git. the program memory is still increasing. After debugging, I find the key is that cxxopts conflict with libtorch.

When I use cxxopts in my main.cpp and load torchscript by torch::jit::load, the bug sometime appears. The program memory is still increasing quickly and finally the program was killed by the operater system, and then there are some infomation like:

Process finished with exit code 9

Then I didn't use cxxopts and use gflags, The bug disappears.

So I think there are some conflicts between libtorch and cxxopts

Originally posted by @liubamboo in yasenh/libtorch-yolov5#28 (comment)

Pitch

Let's replace to a better arguments parser method.