Raise when passing invalid compiler flags to Elixir, closes #7839
Raise when passing invalid compiler flags to Elixir, closes #7839

lexmag/elixir,kimshrier/elixir,pedrosnk/elixir,kimshrier/elixir,elixir-lang/elixir,ggcampinho/elixir,pedrosnk/elixir,kelvinst/elixir,ggcampinho/elixir,joshprice/elixir,michalmuskala/elixir,kelvinst/elixir,lexmag/elixir