Something

Index: kernel/kcomponentdata.cpp
===================================================================
--- kernel/kcomponentdata.cpp   (revision 681384)
+++ kernel/kcomponentdata.cpp   (working copy)
@@ -64,7 +64,7 @@
     return d == rhs.d;
 }

-KComponentData::KComponentData(const QByteArray &name)
+KComponentData::KComponentData(const QByteArray &name, MainComponentRegistration registerAsMain)
     : d(new KComponentDataPrivate)
 {
     Q_ASSERT(!name.isEmpty());
@@ -72,7 +72,7 @@
     d->name = name;
     d->aboutData = new KAboutData(name, "", 0);

-    if (name != "kdeinit4") {
+    if (registerAsMain == RegisterAsMainComponent) {
         KGlobal::newComponentData(*this);
     }
 }
Index: kernel/kcomponentdata.h
===================================================================
--- kernel/kcomponentdata.h     (revision 681384)
+++ kernel/kcomponentdata.h     (working copy)
@@ -85,12 +85,17 @@
      */
     bool operator!=(const KComponentData &rhs) const { return !operator==(rhs); }

+    enum MainComponentRegistration {
+        RegisterAsMainComponent,
+        SkipMainComponentRegistration
+    };
+
     /**
      * Constructor.
      *
      * @param componentName the name of the component.
      */
-    explicit KComponentData(const QByteArray &componentName);
+    explicit KComponentData(const QByteArray &componentName, MainComponentRegistration = RegisterAsMainComponent);

     /**
      * Constructor.