Yes. Apple (NeXT at the time) had to make their objective-c frontend for gcc GPL, and they did not like that. that is why apple spent a lot of money making clang good: it allows them to do have patches they don't want to make available why still getting a good compiler. (I don't know if those patches exist, but they have that ability if they want it)

*BSD has in generally hated having anything GPL in their base system. OpenBSD played with creating their own C compiler for a while (the goal was just a compiler with only minimal optimizations - they expected everyone would just use that to build gcc and then build everything with gcc)