Checkout submodules in GitHub Actions.

diff --git a/.github/workflows/buildtest.yml b/.github/workflows/buildtest.yml
index 4c5c1451e142e6ec1c8478d24fd3d5de0046d3bd..23a031a48063385b712add0a1ddd23870482ef2a 100644 (file)
--- a/.github/workflows/buildtest.yml
+++ b/.github/workflows/buildtest.yml
@@ -21,7 +21,10 @@ jobs:
           - { CC: clang, CXX: clang++ }
 
     steps:
-    - uses: actions/checkout@v2
+    - name: Checkout repository and submodules
+      uses: actions/checkout@v2
+      with:
+        submodules: recursive
 
     - name: Create Build Environment
       # Some projects don't allow in-source building, so create a separate build directory