In my case, I don't believe I had any GCC-only restrictions for the STM32F4 chip I was developing on, so I didn't ever run into this issue.
That being said, it's always worth experimenting with flags in YCM or clangd to see if you can get something working well enough for most development needs. I would take a look at the places where those `#ifdef GCC` macros are used and see if you can spoof the flags enough to get something workable. Throwing a `-DGCC` in your YCM flags, worst case scenario, will just raise an error message and you can remove it. Best case scenario, it won't behave quite the same as GCC but you can get basic linting, autocomplete etc. working. Sometimes this stuff requires a bit of exploration to get working the first time, but once you get a working setup it's very satisfying!
That being said, it's always worth experimenting with flags in YCM or clangd to see if you can get something working well enough for most development needs. I would take a look at the places where those `#ifdef GCC` macros are used and see if you can spoof the flags enough to get something workable. Throwing a `-DGCC` in your YCM flags, worst case scenario, will just raise an error message and you can remove it. Best case scenario, it won't behave quite the same as GCC but you can get basic linting, autocomplete etc. working. Sometimes this stuff requires a bit of exploration to get working the first time, but once you get a working setup it's very satisfying!