Filter out all warning flags from llvm-config including the undocumented (AFAICT) ``-W`` flag (seems to enable more warnings). We should have control over the warnings used to build Halide.
Filter out all warning flags from llvm-config including the undocumented
(AFAICT) ``-W`` flag (seems to enable more warnings). We should have
control over the warnings used to build Halide.


Former-commit-id: a9693a12ea1c4bc8d0b5c3aecdc6c858362ab09b
darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide