Go back to custom Dockerfile, but based on Ubuntu and musl-tools

Author: strfry

.travis.yml

@@ -8,7 +8,7 @@ matrix:
   include:
     - os: linux
       env: TARGET=x86_64-unknown-linux-musl
-           DOCKER=alexcrichton/rust-slave-linux-cross:2016-11-11
+           DOCKER=x86_64-unknown-linux-musl
            SKIP_TESTS=1
       if: branch != master
 

ci/docker/x86_64-unknown-linux-musl/Dockerfile

@@ -1,29 +1,11 @@
-FROM alpine:3.8
+FROM ubuntu:16.04
 
-RUN apk update && \
-  apk add \
+RUN apt-get update && apt-get install -y \
+  musl-tools \
   curl \
   ca-certificates \
   perl \
   make \
-  gcc \
-  bash \
-  musl-dev \
-  llvm-libunwind-dev \
-  cmake \
-  curl-dev \
-  file \
-  libffi-dev \
-  libgit2-dev \
-  libressl-dev \
-  libssh2-dev \
-  llvm5-dev \
-  llvm5-test-utils \
-  python2 \
-  tar \
-  zlib-dev \
-  rust \
-  rust-stdlib \
-  cargo
+  gcc
 
-ENV CC_x86_64_unknown_linux_musl=gcc
+ENV CC_x86_64_unknown_linux_musl=musl-gcc