.bazelrc

# We will use new CROSSTOOL file for our toolchain
build:wasm --crosstool_top=//toolchain:emscripten

# Since emscripten can target both asmjs and web assembly,
# we'll use --cpu as differentiator. We will not configure 
# web assembly toolchain in this tutorial though.
build:wasm --cpu=wasm

# Bazel uses internal tools many of which are written in 
# C++ (such as `process-wrapper`). Therefore we still need a sane
# C++ toolchain for these tools.
build:wasm --host_crosstool_top=@bazel_tools//tools/cpp:toolchain