platforms = [
  "gcc4.8-linux64": [nodeMatcher: 'linux64', config: "linux-gcc4.8"],
]

@NonCPS
def generateBuilds()
{
  def builds = [:]
  for (p in platforms) {
    def name = p.key
    def platform = p.value
    builds[p.key] = { build(name, platform) }
  }
  return builds
}

def build(name, platform)
{
  node(platform.nodeMatcher) {
    stage("Build ${name}") {
      echo "Hello, World for ${platform.config}!"
    }
  }
}

parallel generateBuilds()