Hello,
this was originally reported in https://bugs.debian.org/1027934 hugin 2022.0.0 fails to build against flann 1.9.2 since it does not use FLANN_LIBRARY_DIRS as set by CMakeModules/FindFLANN.cmake
~~~
[ 50%] Linking CXX executable cpfind
cd /dev/shm/HUGIN/hugin-2022.0.0/obj-x86_64-linux-gnu/src/hugin_cpfind/cpfind && /usr/bin/cmake -E cmake_link_script CMakeFiles/cpfind.dir/link.txt --verbose=1
/usr/lib/ccache/c++ -g -O2 -ffile-prefix-map=/dev/shm/HUGIN/hugin-2022.0.0=. -fstack-protector-strong -Wformat -Werror=format-security -Wall -Wdate-time -D_FORTIFY_SOURCE=2 -Wl,-z,relro -Wl,-z,now -Wl,--as-needed -Wl,-z,defs -fopenmp CMakeFiles/cpfind.dir/PanoDetector.cpp.o CMakeFiles/cpfind.dir/PanoDetectorLogic.cpp.o CMakeFiles/cpfind.dir/TestCode.cpp.o CMakeFiles/cpfind.dir/Utils.cpp.o CMakeFiles/cpfind.dir/main.cpp.o -o cpfind -Wl,-rpath,/dev/shm/HUGIN/hugin-2022.0.0/obj-x86_64-linux-gnu/src/hugin_cpfind/localfeatures:/dev/shm/HUGIN/hugin-2022.0.0/obj-x86_64-linux-gnu/src/celeste:/dev/shm/HUGIN/hugin-2022.0.0/obj-x86_64-linux-gnu/src/hugin_base: ../localfeatures/liblocalfeatures.so.0.0 /usr/lib/x86_64-linux-gnu/libvigraimpex.so /usr/lib/x86_64-linux-gnu/libOpenEXR.so /usr/lib/x86_64-linux-gnu/libImath-3_1.so /usr/lib/x86_64-linux-gnu/libIex-3_1.so /usr/lib/x86_64-linux-gnu/libIlmThread-3_1.so /usr/lib/x86_64-linux-gnu/libz.so /usr/lib/x86_64-linux-gnu/libjpeg.so /usr/lib/x86_64-linux-gnu/libtiff.so /usr/lib/x86_64-linux-gnu/libpng.so /usr/lib/x86_64-linux-gnu/libz.so /usr/lib/x86_64-linux-gnu/libz.so /usr/lib/x86_64-linux-gnu/libexiv2.so /usr/lib/x86_64-linux-gnu/libpano13.so ../../foreign/levmar/libhuginlevmar.a /usr/lib/x86_64-linux-gnu/libGLEW.so /usr/lib/x86_64-linux-gnu/libfftw3.so /usr/lib/x86_64-linux-gnu/libvigraimpex.so /usr/lib/x86_64-linux-gnu/libOpenEXR.so /usr/lib/x86_64-linux-gnu/libImath-3_1.so /usr/lib/x86_64-linux-gnu/libIex-3_1.so /usr/lib/x86_64-linux-gnu/libIlmThread-3_1.so /usr/lib/x86_64-linux-gnu/libz.so /usr/lib/x86_64-linux-gnu/libjpeg.so /usr/lib/x86_64-linux-gnu/libtiff.so /usr/lib/x86_64-linux-gnu/libpng.so /usr/lib/x86_64-linux-gnu/libz.so /usr/lib/x86_64-linux-gnu/libz.so /usr/lib/x86_64-linux-gnu/libexiv2.so /usr/lib/x86_64-linux-gnu/liblcms2.so ../../celeste/libceleste.so.0.0 -lflann -lflann_cpp -lhdf5 -lmpi -llz4 ../../hugin_base/libhuginbase.so.0.0 /usr/lib/x86_64-linux-gnu/libX11.so /usr/lib/x86_64-linux-gnu/libOpenGL.so /usr/lib/x86_64-linux-gnu/libGLX.so /usr/lib/x86_64-linux-gnu/libGLU.so /usr/lib/x86_64-linux-gnu/libsqlite3.so /usr/lib/x86_64-linux-gnu/libpano13.so ../../foreign/levmar/libhuginlevmar.a /usr/lib/x86_64-linux-gnu/libGLEW.so /usr/lib/x86_64-linux-gnu/libboost_filesystem.so.1.74.0 /usr/lib/x86_64-linux-gnu/libboost_system.so.1.74.0 /usr/lib/x86_64-linux-gnu/libfftw3.so /usr/lib/x86_64-linux-gnu/libvigraimpex.so /usr/lib/x86_64-linux-gnu/libOpenEXR.so /usr/lib/x86_64-linux-gnu/libImath-3_1.so /usr/lib/x86_64-linux-gnu/libIex-3_1.so /usr/lib/x86_64-linux-gnu/libIlmThread-3_1.so /usr/lib/x86_64-linux-gnu/libz.so /usr/lib/x86_64-linux-gnu/libjpeg.so /usr/lib/x86_64-linux-gnu/libpng.so /usr/lib/x86_64-linux-gnu/libz.so /usr/lib/x86_64-linux-gnu/libjpeg.so /usr/lib/x86_64-linux-gnu/libpng.so /usr/lib/x86_64-linux-gnu/libtiff.so /usr/lib/x86_64-linux-gnu/libexiv2.so /usr/lib/x86_64-linux-gnu/liblcms2.so
/usr/bin/ld: cannot find -lhdf5: No such file or directory
collect2: error: ld returned 1 exit status
~~~
Find attached the patch used in the Debian package patch to fix this.
cu Andreas
Thanks for the patch. Committed to repository (default branch)