Test with GCC 15

Author: gschlager

.github/workflows/test-gcc15.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
 
     container:
-      image: ghcr.io/mattkretz/cplusplus-ci/gcc15
+      image: gcc:15
 
     steps:
       - uses: actions/checkout@v4
@@ -36,11 +36,8 @@ jobs:
           ruby-version: ${{matrix.ruby}}
           bundler-cache: true
 
-      - name: Print GCC version
-        run: gcc --version
-
       - name: Compile C-extension
-        run: bundle exec rake compile
+        run: CC=15 gcc --version && CC=15 bundle exec rake compile
 
       - name: Run tests
         run: bundle exec rake test