Any plans to upgrade gcc version?

[xinyangli]

Hi! I've recently added a package of iEDA to NixOS/nixpkgs#338769 (not merged yet).

I had to make several patches to eliminate errors when compiling with gcc 13, mainly because some headers need to be included explicitly. Since it's only missing headers, it will probably not break the building process on Ubuntu 20.04 (though I have not tested).

I'm not sure if this project has any plans of migrating to newer versions of gcc, but I'm willing to help out.