File eigen-cmake.patch of Package LuminanceHDR

From: Jan Engelhardt <ej@inai.de>
Date: 2026-02-03 16:28:54.000013795 +0100

As per eigen3-3.4.1:/usr/share/eigen3/cmake/UseEigen3.cmake,
the modern way to use Eigen3 is as follows...

[This resolves a build failure with eigen3-5.x, which has
abandoned setting EIGEN3_INCLUDE_DIR.]

---
 CMakeLists.txt                          |    2 --
 src/TonemappingOperators/CMakeLists.txt |    2 +-
 2 files changed, 1 insertion(+), 3 deletions(-)

Index: LuminanceHDR-2.6.0+git313.634b489/CMakeLists.txt
===================================================================
--- LuminanceHDR-2.6.0+git313.634b489.orig/CMakeLists.txt
+++ LuminanceHDR-2.6.0+git313.634b489/CMakeLists.txt
@@ -132,7 +132,6 @@ IF(WIN32)
             set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS} -Werror=unknown-pragmas")
         ENDIF()
         FIND_PACKAGE(Eigen3 REQUIRED)
-        INCLUDE_DIRECTORIES(${EIGEN3_INCLUDE_DIR})
     ELSE()
         SET(LIBRAW_INCLUDE_DIR "${CMAKE_SOURCE_DIR}/../DEPs/include/libraw")
         SET(FFTWF_INCLUDE_DIR "${CMAKE_SOURCE_DIR}/../DEPs/include/fftw3")
@@ -174,7 +173,6 @@ ELSE()
     INCLUDE_DIRECTORIES(${LCMS2_INCLUDE_DIR})
 
     FIND_PACKAGE(Eigen3 REQUIRED)
-    INCLUDE_DIRECTORIES(${EIGEN3_INCLUDE_DIR})
 ENDIF()
 
 IF(WIN32)
Index: LuminanceHDR-2.6.0+git313.634b489/src/TonemappingOperators/CMakeLists.txt
===================================================================
--- LuminanceHDR-2.6.0+git313.634b489.orig/src/TonemappingOperators/CMakeLists.txt
+++ LuminanceHDR-2.6.0+git313.634b489/src/TonemappingOperators/CMakeLists.txt
@@ -24,7 +24,7 @@ FILE(GLOB FILES_H *.h)
 FILE(GLOB FILES_CPP *.cpp)
 
 ADD_LIBRARY(pfstmo STATIC ${TM_LIBPFS_H} ${TM_LIBPFS_CPP} ${FILES_H} ${FILES_CPP})
-TARGET_LINK_LIBRARIES(pfstmo pfs Qt5::Core Qt5::Gui Qt5::Widgets)
+TARGET_LINK_LIBRARIES(pfstmo pfs Qt5::Core Qt5::Gui Qt5::Widgets Eigen3::Eigen)
 
 SET(LUMINANCE_MODULES_GUI ${LUMINANCE_MODULES_GUI} pfstmo PARENT_SCOPE)
 SET(LUMINANCE_MODULES_CLI ${LUMINANCE_MODULES_CLI} pfstmo PARENT_SCOPE)