WIP: only gcc

Author: netromdk

.github/workflows/test.yml

@@ -14,8 +14,10 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [windows-latest, macos-latest, ubuntu-latest]
-        compiler: [default, gcc, clang]
+        #os: [windows-latest, macos-latest, ubuntu-latest]
+        #compiler: [default, gcc, clang]
+        os: [ubuntu-latest]
+        compiler: [gcc]
 
         # Only run "default" on Windows and macOS, but both Clang and GCC on Linux.
         exclude: