Same problem as in bug 681898 -- fix was dropped from 1.9.2 FAILED: src/hugin_cpfind/cpfind/cpfind : && /usr/bin/x86_64-pc-linux-gnu-g++ -march=native -mtune=native -ggdb -O2 -pipe -Wl,--as-needed -fopenmp -Wl,--dependency-file=src/hugin_cpfind/cpfind/CMakeFiles/cpfind.dir/link.d src/hugin_cpfind/cpfind/CMakeFiles/cpfind.dir/PanoDetector.cpp.o src/hugin_cpfind/cpfind/CMakeFi les/cpfind.dir/PanoDetectorLogic.cpp.o src/hugin_cpfind/cpfind/CMakeFiles/cpfind.dir/TestCode.cpp.o src/hugin_cpfind/cpfind/CMakeFiles/cpfind.dir/Utils.cpp.o src/hugin_cpfind/cpfind/CMakeFiles/cpfind.dir/main.cpp.o -o src/hugin_cpfind/cpfind/cpfind -L/var/tmp/portage/media-gfx/hugi n-2024.0.1/work/hugin-2024.0.1/src/hugin_cpfind/cpfind/-llz4 -Wl,-rpath,/var/tmp/portage/media-gfx/hugin-2024.0.1/work/hugin-2024.0.1/src/hugin_cpfind/cpfind/-llz4:/var/tmp/portage/media-gfx/hugin-2024.0.1/work/hugin-2024.0.1_build/src/hugin_cpfind/localfeatures:/var/tmp/portage/me dia-gfx/hugin-2024.0.1/work/hugin-2024.0.1_build/src/celeste:/var/tmp/portage/media-gfx/hugin-2024.0.1/work/hugin-2024.0.1_build/src/hugin_base: src/hugin_cpfind/localfeatures/liblocalfeatures.so.0.0 /usr/lib64/libvigraimpex.so /usr/lib64/libOpenEXR.so /usr/lib64/libImath-3_1.s o /usr/lib64/libIex.so /usr/lib64/libIlmThread.so /usr/lib64/libz.so /usr/lib64/libjpeg.so /usr/lib64/libtiff.so /usr/lib64/libpng.so /usr/lib64/libz.so /usr/lib64/libz.so /usr/lib64/libexiv2.so /usr/lib64/libpano13.so src/foreign/levmar/libhuginlevmar.a /usr/lib64/libG LEW.so /usr/lib64/libfftw3.so /usr/lib64/libvigraimpex.so /usr/lib64/libOpenEXR.so /usr/lib64/libImath-3_1.so /usr/lib64/libIex.so /usr/lib64/libIlmThread.so /usr/lib64/libz.so /usr/lib64/libjpeg.so /usr/lib64/libtiff.so /usr/lib64/libpng.so /usr/lib64/libz.so /usr/lib6 4/libz.so /usr/lib64/libexiv2.so /usr/lib64/liblcms2.so src/celeste/libceleste.so.0.0 -lflann -lflann_cpp src/hugin_base/libhuginbase.so.0.0 /usr/lib64/libX11.so /usr/lib64/libOpenGL.so /usr/lib64/libGLX.so /usr/lib64/libGLU.so /usr/lib64/libsqlite3.so /usr/lib64/libpan o13.so src/foreign/levmar/libhuginlevmar.a /usr/lib64/libGLEW.so /usr/lib64/libboost_filesystem.so.1.87.0 /usr/lib64/libboost_atomic.so.1.87.0 /usr/lib64/libboost_system.so.1.87.0 /usr/lib64/libfftw3.so /usr/lib64/libvigraimpex.so /usr/lib64/libOpenEXR.so /usr/lib64/libIma th-3_1.so /usr/lib64/libIex.so /usr/lib64/libIlmThread.so /usr/lib64/libz.so /usr/lib64/libjpeg.so /usr/lib64/libpng.so /usr/lib64/libz.so /usr/lib64/libjpeg.so /usr/lib64/libpng.so /usr/lib64/libtiff.so /usr/lib64/libexiv2.so /usr/lib64/liblcms2.so && : /usr/lib/gcc/x86_64-pc-linux-gnu/14/../../../../x86_64-pc-linux-gnu/bin/ld: src/hugin_cpfind/cpfind/CMakeFiles/cpfind.dir/PanoDetectorLogic.cpp.o: in function `flann::serialization::SaveArchive::flushBlock()': /usr/include/flann/util/serialization.h:425:(.text._ZN5flann13serialization11SaveArchive10flushBlockEv[_ZN5flann13serialization11SaveArchive10flushBlockEv]+0x47): undefined reference to `LZ4_compress_HC_continue' /usr/lib/gcc/x86_64-pc-linux-gnu/14/../../../../x86_64-pc-linux-gnu/bin/ld: /usr/include/flann/util/serialization.h:443:(.text._ZN5flann13serialization11SaveArchive10flushBlockEv[_ZN5flann13serialization11SaveArchive10flushBlockEv]+0xd1): undefined reference to `LZ4_compress_HC_continue' /usr/lib/gcc/x86_64-pc-linux-gnu/14/../../../../x86_64-pc-linux-gnu/bin/ld: src/hugin_cpfind/cpfind/CMakeFiles/cpfind.dir/PanoDetectorLogic.cpp.o: in function `flann::serialization::SaveArchive::initBlock()': /usr/include/flann/util/serialization.h:406:(.text._ZN5flann8LshIndexINS_2L2IdEEE9saveIndexEP8_IO_FILE[_ZN5flann8LshIndexINS_2L2IdEEE9saveIndexEP8_IO_FILE]+0x98): undefined reference to `LZ4_resetStreamHC' /usr/lib/gcc/x86_64-pc-linux-gnu/14/../../../../x86_64-pc-linux-gnu/bin/ld: /usr/include/flann/util/serialization.h:406:(.text._ZN5flann11LinearIndexINS_2L2IdEEE9saveIndexEP8_IO_FILE[_ZN5flann11LinearIndexINS_2L2IdEEE9saveIndexEP8_IO_FILE]+0x94): undefined reference to `LZ4_resetStreamHC' /usr/lib/gcc/x86_64-pc-linux-gnu/14/../../../../x86_64-pc-linux-gnu/bin/ld: /usr/include/flann/util/serialization.h:406:(.text._ZN5flann14AutotunedIndexINS_2L2IdEEE9saveIndexEP8_IO_FILE[_ZN5flann14AutotunedIndexINS_2L2IdEEE9saveIndexEP8_IO_FILE]+0x9d): undefined reference to `LZ4_resetStreamHC' /usr/lib/gcc/x86_64-pc-linux-gnu/14/../../../../x86_64-pc-linux-gnu/bin/ld: /usr/include/flann/util/serialization.h:406:(.text._ZN5flann27HierarchicalClusteringIndexINS_2L2IdEEE9saveIndexEP8_IO_FILE[_ZN5flann27HierarchicalClusteringIndexINS_2L2IdEEE9saveIndexEP8_IO_FILE]+0x9c): undefined reference to `LZ4_resetStreamHC' /usr/lib/gcc/x86_64-pc-linux-gnu/14/../../../../x86_64-pc-linux-gnu/bin/ld: /usr/include/flann/util/serialization.h:406:(.text._ZN5flann11KMeansIndexINS_2L2IdEEE9saveIndexEP8_IO_FILE[_ZN5flann11KMeansIndexINS_2L2IdEEE9saveIndexEP8_IO_FILE]+0x96): undefined reference to `LZ4_resetStreamHC' /usr/lib/gcc/x86_64-pc-linux-gnu/14/../../../../x86_64-pc-linux-gnu/bin/ld: src/hugin_cpfind/cpfind/CMakeFiles/cpfind.dir/PanoDetectorLogic.cpp.o:/usr/include/flann/util/serialization.h:406: more undefined references to `LZ4_resetStreamHC' follow collect2: error: ld returned 1 exit status Reproducible: Always
Created attachment 915981 [details] build log
Got the same problem here. The reason is the following line in /usr/lib64/pkgconfig/flann.pc: Libs: -L${libdir} -L/usr/lib64;-llz4 -lflann -lflann_cpp Removing the semicolon fixes the problem compiling projects using flann.
More info: In flann-1.9.2/cmake/flann.pc.in I see that the semicolon comes from substituting @LZ4_STATIC_LDFLAGS@. This in turn comes from pkg_check_modules(LZ4 REQUIRED liblz4) in the main CMakeLists.txt which transforms the "Libs: -L${libdir} -llz4" line in /usr/lib64/pkgconfig/liblz4.pc in this way. I'm not deep enough into cmake to see whether a different variable than LZ4_STATIC_LDFLAGS should be substituted.
https://github.com/flann-lib/flann/pull/523 perhaps
(In reply to Sam James from comment #4) > https://github.com/flann-lib/flann/pull/523 perhaps Yes, that should help as it removes @LZ4_STATIC_LDFLAGS@ from flann.pc.in. The upstream issue https://github.com/flann-lib/flann/issues/514 sound exactly like this but others are mentioned in the pull request.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=4db46c950246613586189689f3f05e5c6e7e0717 commit 4db46c950246613586189689f3f05e5c6e7e0717 Author: Paul Zander <negril.nx+gentoo@gmail.com> AuthorDate: 2025-01-06 19:29:46 +0000 Commit: Sam James <sam@gentoo.org> CommitDate: 2025-01-06 21:32:03 +0000 sci-libs/flann: add 1.9.2_p20221027, drop 1.9.2 uses latest upstream commit update cmake code, handle warnings use enable_language for cuda and fix warnings in code use find_package(Python) instead of PythonInterp fix erroneous dependency for doc, unmask the flag Closes: https://bugs.gentoo.org/947608 Closes: https://bugs.gentoo.org/947602 Closes: https://bugs.gentoo.org/946465 Closes: https://bugs.gentoo.org/829080 Bug: https://bugs.gentoo.org/830013 Signed-off-by: Paul Zander <negril.nx+gentoo@gmail.com> Signed-off-by: Sam James <sam@gentoo.org> profiles/base/package.use.mask | 3 +- sci-libs/flann/Manifest | 3 +- .../flann/files/flann-1.9.2-system-gtest.patch | 36 +++++++++ ...n-1.9.2.ebuild => flann-1.9.2_p20221027.ebuild} | 88 ++++++++++++++++------ 4 files changed, 105 insertions(+), 25 deletions(-)
