Yes, the undisputed #1 free compiler on the planet, which supports more platforms than most compilers combined and which is used to build every single Linux and Android system out there, and which still generates the fastest code among free compilers -- is a relic.
Phoronix is full of genius gems like this one.
I welcome the healthy competition brought by Clang, and think that having choice among free compilers is a great thing. The only thing I hope does NOT happen, is for LLVM to kill GCC. As long as the two coexist, I support and like LLVM.
Killing GCC would kill Free Software, period. GCC is the most important FS project ever conceived, and it must survive. Hopefully, with some friendly competition, it will improve in the process.
I was prepared to accept GCC as having its place in the compiler world in the face of moving to clang personally.
That is, until they obnoxiously deprecated IRIX MIPS support in 4.9.
GCC's tremendous multiplatform support is one of its greatest assets. The destruction of this has eliminated my desire to bother with it. Gcc still has a place in my world, but that is only to act as a counterbalance to an LLVM monoculture and drive forward innovation.
Clang can't compile Linux because of all the GCC extensions built right into the Kernel, though I believe there's a branch that Clang can compile. As for performance, OpenMP support will likely drop within the year, and I'd suspect GCC will fall behind there as well.
GCC is a relic, end story.
That's even more funny, because GCC supports more architectures, it's more mature and complete. It's faster even in non OpenMP benchmarks. It's far from being a relic.