From 0cc63c4e426c516db835bc323c22ecc72e0bf82f Mon Sep 17 00:00:00 2001
From: Paul Zander <negril.nx+gentoo@gmail.com>
Date: Thu, 8 Jan 2026 22:02:00 +0100
Subject: [PATCH] update find vtk

Signed-off-by: Paul Zander <negril.nx+gentoo@gmail.com>

diff --git a/cmake/pcl_find_vtk.cmake b/cmake/pcl_find_vtk.cmake
index ab48e74..adba979 100644
--- a/cmake/pcl_find_vtk.cmake
+++ b/cmake/pcl_find_vtk.cmake
@@ -28,7 +28,14 @@ endfunction()
 # the version of VTK. As the module names were changed from VTK 8.2 to 9.0, we don't
 # search explicitly for modules. Furthermore we don't pass required minimum version 6.2
 # to find_package because then it only accept versions with same major version.
-find_package(VTK)
+
+# Module names changed between 8 and 9, so do a QUIET find for 9 and its module name first, and fall back
+# to v7 minimum with the old component name if it is not found.
+find_package(VTK COMPONENTS CommonCore QUIET NO_MODULE)
+if(NOT VTK_FOUND)
+  message(STATUS "Did not find VTK 9, trying for an older version")
+  find_package(VTK COMPONENTS vtkCommonCore REQUIRED NO_MODULE)
+endif()
 
 if(NOT VTK_FOUND)
     return()
@@ -44,7 +51,6 @@ set(NON_PREFIX_PCL_VTK_COMPONENTS
   ChartsCore
   CommonColor
   CommonComputationalGeometry
-  CommonCore
   CommonDataModel
   CommonExecutionModel
   CommonMath
@@ -79,7 +85,7 @@ set(VTK_RENDERING_BACKEND "OpenGL2")
 set(VTK_RENDERING_BACKEND_OPENGL_VERSION "2")
 list(APPEND NON_PREFIX_PCL_VTK_COMPONENTS Rendering${VTK_RENDERING_BACKEND} RenderingContext${VTK_RENDERING_BACKEND})
 
-#Append vtk to components if version is <9.0
+# Append vtk to components if version is <9.0
 if(VTK_VERSION VERSION_LESS 9.0)
   foreach(vtkComponent ${NON_PREFIX_PCL_VTK_COMPONENTS})
     set(vtkComponent "vtk${vtkComponent}")
@@ -90,6 +96,7 @@ else()
 endif()
 
 # Check if requested modules are available
+find_package(VTK COMPONENTS ${PCL_VTK_COMPONENTS} REQUIRED NO_MODULE)
 checkVTKComponents(COMPONENTS ${PCL_VTK_COMPONENTS} MISSING_COMPONENTS vtkMissingComponents)
 
 if (vtkMissingComponents)
-- 
2.52.0