> There are plenty of operating systems that use C++ on the kernel side of things Language-wise, Darwin/XNU/IOkit uses a subset of C++, notably one that exclud

> There are plenty of operating systems that use C++ on the kernel side of things Language-wise, Darwin/XNU/IOkit uses a subset of C++, notably one that excludes exceptions and templates IIRC. stdlib-wise I suspect it's even more restricted/different.