Disable non-templaet-friend warning in GCC since it's firing in LLVM

.github/workflows/ci.yml

@@ -128,6 +128,14 @@ jobs:
           sudo apt-get install g++-13
           echo "CXXFLAGS=$CXXFLAGS" >> $GITHUB_ENV
 
+      # GCC has a warning on the LLVM 18 codebase now.
+      # https://github.com/llvm/llvm-project/issues/67942
+      - name: Disable GCC Warning
+        if: matrix.config.name == 'Ubuntu GCC'
+        run: |
+          echo "CFLAGS=$CFLAGS -Wno-non-template-friend" >> $GITHUB_ENV
+          echo "CXXFLAGS=$CXXFLAGS -Wno-non-template-friend" >> $GITHUB_ENV
+
       # vptr is incompatible with no-rtti. We turn off rtti to match the LLVM libraries.
       - name: Set Sanitizer Flags
         if: endsWith(matrix.config.name, 'Sanitizer')

.github/workflows/try.yml

@@ -138,6 +138,14 @@ jobs:
           echo "CFLAGS=$CFLAGS -fsanitize=address -fsanitize=undefined -fno-sanitize=vptr -O0" >> $GITHUB_ENV
           echo "CXXFLAGS=$CXXFLAGS -fsanitize=address -fsanitize=undefined -fno-sanitize=vptr -O0" >> $GITHUB_ENV
 
+      # GCC has a warning on the LLVM 18 codebase now.
+      # https://github.com/llvm/llvm-project/issues/67942
+      - name: Disable GCC Warning
+        if: matrix.config.name == 'Ubuntu GCC'
+        run: |
+          echo "CFLAGS=$CFLAGS -Wno-non-template-friend" >> $GITHUB_ENV
+          echo "CXXFLAGS=$CXXFLAGS -Wno-non-template-friend" >> $GITHUB_ENV
+
       - name: Download Ninja
         id: ninja
         shell: cmake -P {0}

subdoc/gen_tests/typenames-across-paths/namespace.n.html

@@ -273,7 +273,7 @@
               <div class="type-signature"><a name="alias.var"></a><a class="type-name" href="other-namespace.subother.html#variable.var">var</a></div>
             </div>
             <div class="description short">
-              <p>Forwarding alias of <a href="other-namespace.subother.html#variable.var"><code>var</code></a>.</p>
+              <p>Deduces to <code>int var</code>.</p>
             </div>
           </li>
         </ul>