iwyu.yml: run include-what-you-use on cfg test files

Author: firewave

.github/workflows/iwyu.yml

@@ -79,6 +79,7 @@ jobs:
           dnf install -y p7zip-plugins  # required as fallback for py7zr in Qt installation
           dnf install -y python3-pip  # fixes missing pip module in jurplel/install-qt-action
           dnf install -y python3-devel  # fixes building of wheels for jurplel/install-qt-action
+          dnf install -y cairo-devel gtk3-devel libcurl-devel lua-devel openssl-devel python3-devel sqlite-devel boost-devel cppunit-devel libsigc++20-devel  # for strict cfg checks
           dnf install -y iwyu
           ln -s iwyu_tool.py /usr/bin/iwyu_tool
 
@@ -150,6 +151,14 @@ jobs:
           # TODO: remove -stdlib= - it should have been taken from the compilation database
           iwyu_tool -p cmake.output -j $(nproc) -- -w -Xiwyu --max_line_length=1024 -Xiwyu --comment_style=long -Xiwyu --quoted_includes_first -Xiwyu --update_comments -stdlib=${{ matrix.stdlib }} ${{ matrix.mapping_file_opt }} ${{ matrix.clang_inc }} > iwyu.log
 
+      - name: test/cfg
+        if: matrix.stdlib == 'libstdc++'
+        run: |
+          # TODO: redirect to log
+          ./test/cfg/runtests.sh
+        env:
+          IWYU: include-what-you-use
+
       - uses: actions/upload-artifact@v4
         if: success() || failure()
         with: