On Tue, Jan 26, 2021 at 08:51:55AM -0600, Josh Poimboeuf wrote: > User space mixes compiler versions all the time. The C ABI is stable. > > What specifically is the harder issue you're referring to? I don't think the C ABI captures nearly enough. Imagine trying to mix a compiler with and without asm-goto support (ok, we fail to build without by now, but just imagine). No C ABI violated, but having that GCC extention vs not having it radically changes the kernel ABI. I think I'm with Greg here, just don't do it.
