From: Jan Engelhardt 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)