Add an azure build

azure-pipelines.yml

@@ -0,0 +1,45 @@
+trigger:
+- master
+jobs:
+
+- job: Linux
+  pool:
+    vmImage: 'ubuntu-16.04'
+  container:
+    image: 'ubuntu:18.04'
+    options: "--name ci-container -v /usr/bin/docker:/tmp/docker:ro"
+  steps:
+  - script: |
+      /tmp/docker exec -t -u 0 ci-container \
+      sh -c "apt-get update && DEBIAN_FRONTEND=noninteractive apt-get -o Dpkg::Options::="--force-confold" -y install sudo"
+    displayName: set up sudo
+  - checkout: self
+    submodules: true
+  - script: |
+      whoami
+      pwd
+      sudo apt-get install -y \
+        cmake libgmp-dev libmpfr-dev libmpc-dev \
+        libboost-all-dev bison texinfo \
+        ruby
+    displayName: 'install prerequisites'
+  - script: |
+      mkdir build
+      cd build
+      ../build-toolchain.bash --no-carbon
+    displayName: 'build'
+
+- job: macOS
+  pool:
+    vmImage: 'macOS-10.14'
+  steps:
+  - checkout: self
+    submodules: true
+  - script: |
+      brew install boost cmake gmp mpfr libmpc bison
+    displayName: 'brew prerequisites'
+  - script: |
+      mkdir build
+      cd build
+      ../build-toolchain.bash --no-carbon
+    displayName: build