Dockerfile

FROM ubuntu:16.04

RUN apt-get update && apt-get install -y --no-install-recommends \
  g++ \
  make \
  file \
  curl \
  ca-certificates \
  python \
  git \
  cmake \
  sudo \
  gdb \
  xz-utils \
  bzip2

COPY scripts/emscripten.sh /scripts/
RUN bash /scripts/emscripten.sh

COPY scripts/sccache.sh /scripts/
RUN sh /scripts/sccache.sh

ENV PATH=$PATH:/emsdk-portable
ENV PATH=$PATH:/emsdk-portable/upstream/emscripten/
ENV PATH=$PATH:/emsdk-portable/node/12.9.1_64bit/bin/
ENV BINARYEN_ROOT=/emsdk-portable/upstream/

ENV TARGETS=wasm32-unknown-emscripten

# Use -O1 optimizations in the link step to reduce time spent optimizing.
ENV EMCC_CFLAGS=-O1

# Emscripten installation is user-specific
ENV NO_CHANGE_USER=1

# libcore takes about 15 minutes to build, so skip it
ENV SCRIPT python2.7 ../x.py test --target $TARGETS --exclude src/libcore