message: Use env instead of cmake arg
diff: @@ -70,7 +70,7 @@ pipeline {
  }
  stage ('GCC on Mac') {
  agent { label 'macOS && gcc' }
  - steps { unixBuild('Debug', '-DCMAKE_CXX_COMPILER=g++') }
  + steps { unixBuild('Debug') }
  }
  stage ('FreeBSD') {
  agent { label 'FreeBSD' }
  @@ -148,6 +148,7 @@ def unixBuild(buildType = 'Debug',
  generator = 'Unix Makefiles',
  cleanBuild = true) {
  echo "building on $NODE_NAME"
  + withEnv(["label_exp="+STAGE_NAME.toLowerCase()]) {
  deleteDir()
  unstash('caf-sources')
  dir('caf-sources') {
  @@ -171,6 +172,7 @@ def unixBuild(buildType = 'Debug',
  ])
  }
  }
  +}
  def msBuild(buildType = 'Debug',
  buildOpts = '',
  