- Add logic so extra plugins can build without installing base components.

--- src/filter/CMakeLists.txt.orig	2025-12-02 16:23:47 UTC
+++ src/filter/CMakeLists.txt
@@ -15,6 +15,7 @@ endif (${Cairo_FOUND})
   add_subdirectory (mirr0r)
 endif (${Cairo_FOUND})
 
+if (NOT BUILD_EXTRA_PLUGINS)
 add_subdirectory (3dflippo)
 add_subdirectory (aech0r)
 add_subdirectory (alpha0ps)
@@ -103,3 +104,4 @@ add_subdirectory (vignette)
 add_subdirectory (twolay0r)
 add_subdirectory (vertigo)
 add_subdirectory (vignette)
+endif ()
