message: Set the GCC via cmake arg
diff: @@ -70,7 +70,7 @@ pipeline {
  }
  stage ('GCC on Mac') {
  agent { label 'macOS && gcc' }
  - steps { unixBuild() }
  + steps { unixBuild('Debug', '-DCMAKE_CXX_COMPILER=g++') }
  }
  stage ('FreeBSD') {
  agent { label 'FreeBSD' }
  @@ -82,7 +82,7 @@ pipeline {
  }
  stage('Logging') {
  agent { label 'Linux' }
  - steps { unixBuild([buildOpts: '-D CAF_LOG_LEVEL=4']) }
  + steps { unixBuild('Debug', '-DCAF_LOG_LEVEL=4') }
  }
  stage('Release') {
  agent { label 'Linux' }
  @@ -91,7 +91,7 @@ pipeline {
  stage('Coverage') {
  agent { label "gcovr" }
  steps {
  - unixBuild([buildOpts: '-D CAF_ENABLE_GCOV=yes'])
  + unixBuild('Debug', '-DCAF_ENABLE_GCOV=yes')
  dir('caf-sources') {
  sh 'gcovr -e libcaf_test -e ".*/test/.*" -x -r .. > coverage.xml'
  cobertura([
  @@ -144,8 +144,8 @@ pipeline {
  }
  def unixBuild(buildType = 'Debug',
  - generator = 'Unix Makefiles',
  buildOpts = '',
  + generator = 'Unix Makefiles',
  cleanBuild = true) {
  echo "building on $NODE_NAME"
  deleteDir()
  @@ -173,8 +173,8 @@ def unixBuild(buildType = 'Debug',
  }
  def msBuild(buildType = 'Debug',
  - generator = 'Visual Studio 15 2017',
  buildOpts = '',
  + generator = 'Visual Studio 15 2017',
  cleanBuild = true) {
  echo "building on $NODE_NAME"
  deleteDir()
  