make some plugins used the shared framework

Change-Id: Ie283a4774564f25e0fde8ca35212f92be786d671
Reviewed-on: https://gerrit.libreoffice.org/75785
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

compilerplugins/clang/data.cxx

@@ -6,6 +6,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
+#ifndef LO_CLANG_SHARED_PLUGINS
 
 #include "check.hxx"
 #include "compat.hxx"
@@ -68,17 +69,21 @@ public:
         return true;
     }
 
-private:
+    bool preRun() override { return compiler.getLangOpts().CPlusPlus; }
+
     void run() override
     {
-        if (compiler.getLangOpts().CPlusPlus)
+        if (preRun())
         {
             TraverseDecl(compiler.getASTContext().getTranslationUnitDecl());
         }
     }
 };
 
-static loplugin::Plugin::Registration<Data> reg("data");
-}
+static loplugin::Plugin::Registration<Data> data("data");
+
+} // namespace
+
+#endif // LO_CLANG_SHARED_PLUGINS
 
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