mson macos gfortran bug workaround [skip travis] [skip appveyor]

Author: scivision

azure-pipelines.yml

@@ -10,7 +10,9 @@ jobs:
       versionSpec: '3.6'
       addToPath: true
   - script: |
-      sudo apt install -yq --no-install-recommends gfortran
+      sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
+      sudo apt update -q
+      sudo apt install -yq --no-install-recommends gfortran-6
       curl -Ls https://github.com/ninja-build/ninja/releases/download/v1.9.0/ninja-linux.zip -o ninja-linux.zip
       sudo unzip ninja-linux.zip -d /usr/local/bin/
       python -m pip install meson

cxx/meson.build

@@ -4,6 +4,10 @@ if fc.get_id() == 'pgi'
   subdir_done()
 endif
 
+if os == 'darwin'
+  message('cxx: Meson build on Mac')
+  subdir_done()
+endif
 
 call_f = library('call_f', 'c_call_f.f90')
 c_call_f = executable('c_call_f', 'cxx_call_f.cxx', link_with: call_f)