Unix Compiler Version Check Bug Report

[Cfather]

Hi, I think I found a bug in lib/ipopt.m.

I'm working on Ubuntu 22.04 and gcc-11.3. But in line 272, you are still using the first digit (myCCompiler.Version(1:1)) to check the compiler version. So the gcc-11.3 will be mistakenly recognized as gcc-1.

I'm ignoring all the version checks for now. But the mex file still can not work on my system and always crashes my Matlab.

I appreciate your work! I will let you know if I'm able to fix this. Thanks!