message: docker-compose.yaml: enable environment configuration of build variables
diff: -version: '2'
  +version: '2.1'
  services:
  @@ -10,21 +10,21 @@ services:
  - http_proxy
  - https_proxy
  - no_proxy
  - - BUILDDOC=OFF
  - - BUILDCPP=ON
  - - BUILDFTI=ON
  - - BUILDSWIGPYTHON=OFF
  - - BUILDSWIGJAVA=OFF
  - - BUILDSWIGNODE=OFF
  - - BUILDEXAMPLES=ON
  - - IPK=OFF
  - - RPM=OFF
  - - NPM=OFF
  - - BUILDTESTS=ON
  - - CC=clang-3.8
  - - CXX=clang++-3.8
  - - NODE_VERSION=v4.1.2
  - - WERROR=ON
  + - BUILDDOC=${BUILDDOC:-OFF}
  + - BUILDCPP=${BUILDCPP:-ON}
  + - BUILDFTI=${BUILDFTI:-ON}
  + - BUILDSWIGPYTHON=${BUILDSWIGPYTHON:-OFF}
  + - BUILDSWIGJAVA=${BUILDSWIGJAVA:-OFF}
  + - BUILDSWIGNODE=${BUILDSWIGJAVA:-OFF}
  + - BUILDEXAMPLES=${BUILDEXAMPLE:-ON}
  + - IPK=${IPK:-OFF}
  + - RPM=${RPM:-OFF}
  + - NPM=${NPM:-OFF}
  + - BUILDTESTS=${BUILDTESTS:-ON}
  + - CC=${CC:-clang-3.8}
  + - CXX=${CXX:-clang++-3.8}
  + - NODE_VERSION=${NODE_VERSION:-v4.1.2}
  + - WERROR=${WERROR:-ON}
  environment:
  - http_proxy
  - https_proxy
  