[rpms/pcl] f44: Extend Eigen3 patch to installed PCLConfig.cmake

[rpms/pcl] f44: Extend Eigen3 patch to installed PCLConfig.cmake

[Scott K Logan]

            A new commit has been pushed.

            Repo   : rpms/pcl
            Branch : f44
            Commit : e82806c930f5c8c9a780206a2c8f69df70450414
            Author : Scott K Logan <logans@cottsay.net>
            Date   : 2026-09-20T22:32:21-04:00
            Stats  : +20/-1 in 1 file(s)
            URL    : https://src.fedoraproject.org/rpms/pcl/c/e82806c930f5c8c9a780206a2c8f69df70450414?branch=f44

            Log:
            Extend Eigen3 patch to installed PCLConfig.cmake

The existing patch allows PCL to be built, but the same treatment is
needed in PCLConfig.cmake for downstream packages to build.

---
diff --git a/pcl-1.15.1-eigen5.patch b/pcl-1.15.1-eigen5.patch
index 81a2ad2..6cc7475 100644
--- a/pcl-1.15.1-eigen5.patch
+++ b/pcl-1.15.1-eigen5.patch
@@ -2,7 +2,8 @@ diff --git a/CMakeLists.txt b/CMakeLists.txt
 index 5e2e90d..f000000 100644
 --- a/CMakeLists.txt
 +++ b/CMakeLists.txt
-@@ -346,7 +346,12 @@ find_package(Threads REQUIRED)
+@@ -346,7 +346,12 @@ endif()
+ find_package(Threads REQUIRED)
  
  # Eigen3 (required)
 -find_package(Eigen3 3.3 REQUIRED NO_MODULE)
@@ -15,3 +16,21 @@ index 5e2e90d..f000000 100644
  if(NOT EIGEN3_FOUND AND Eigen3_FOUND)
      set(EIGEN3_FOUND ${Eigen3_FOUND})
  endif()
+diff --git a/PCLConfig.cmake.in b/PCLConfig.cmake.in
+index 455e81e..bb23c9a 100644
+--- a/PCLConfig.cmake.in
++++ b/PCLConfig.cmake.in
+@@ -118,7 +118,12 @@ macro(find_eigen3)
+   if(PCL_ALL_IN_ONE_INSTALLER)
+     set(Eigen3_DIR "${PCL_ROOT}/3rdParty/Eigen3/share/eigen3/cmake/")
+   endif()
+-  find_package(Eigen3 3.3 REQUIRED NO_MODULE)
++  find_package(Eigen3 REQUIRED NO_MODULE)
++  if(EIGEN3_VERSION_STRING AND EIGEN3_VERSION_STRING VERSION_LESS 3.3)
++    message(FATAL_ERROR "Eigen3 >= 3.3 is required, found ${EIGEN3_VERSION_STRING}")
++  endif()
++  # Fedora's Eigen 5 package advertises version 5.x even though it stays API-compatible.
++  # Ensure the legacy variable mirrors the newer one for downstream logic.
+   if(NOT EIGEN3_FOUND AND Eigen3_FOUND)
+     set(EIGEN3_FOUND ${Eigen3_FOUND})
+   endif()