hugin-devs team mailing list archive

[Dennis Schridde <1892420@xxxxxxxxxxxxxxxxxx>]

> What is the error the build system report without the patch?

cd /tmp/portage/media-gfx/hugin-2019.2.0/work/hugin-2019.2.0_build/src/tools && /usr/bin/cmake -E cmake_link_script CMakeFiles/cpclean.dir/link.txt --verbose=1
/usr/sbin/x86_64-pc-linux-gnu-g++ -pipe -O2 -march=znver1 -Wl,-O1 -Wl,--as-needed -Wl,--hash-style=gnu -fopenmp CMakeFiles/cpclean.dir/cpclean.cpp.o -o cpclean  -Wl,-rpath,/tmp/portage/media-gfx/hugin-2019.2.0/work/hugin-2019.2.0_build/src/hugin_base: ../hugin_base/libhuginbase.so.0.0 /usr/lib64/libpano13.so ../foreign/levmar/libhuginlevmar.a /usr/lib64/libGLEW.so /usr/lib64/libboost_filesystem-mt.so /usr/lib64/libboost_system-mt.so /usr/lib64/liblapack.so /usr/lib64/libfftw3.so /usr/lib64/libvigraimpex.so /usr/lib64/libImath.so /usr/lib64/libIlmImf.so /usr/lib64/libIex.so /usr/lib64/libHalf.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/liblcms2.so -pthread /usr/lib64/libX11.so /usr/lib64/libpano13.so /usr/lib64/libboost_filesystem-mt.so /usr/lib64/libboost_system-mt.so /usr/lib64/liblapack.so /usr/lib64/libGL.so /usr/lib64/libGLU.so /usr/lib64/libGLEW.so /usr/lib64/libsqlite3.so /usr/lib64/libvigraimpex.so /usr/lib64/libjpeg.so /usr/lib64/libpng.so /usr/lib64/libtiff.so /usr/lib64/libexiv2.so /usr/lib64/liblcms2.so 
../hugin_base/libhuginbase.so.0.0: error: undefined reference to 'dgemm_'
collect2: error: ld returned 1 exit status


You can find more details at: https://bugs.gentoo.org/738274

** Bug watch added: Gentoo Bugzilla #738274
   https://bugs.gentoo.org/show_bug.cgi?id=738274

** Also affects: hugin (Gentoo Linux) via
   https://bugs.gentoo.org/show_bug.cgi?id=738274
   Importance: Unknown
       Status: Unknown

** Attachment added: "build.log"
   https://bugs.launchpad.net/gentoo/+source/hugin/+bug/1892420/+attachment/5403584/+files/build.log

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https://bugs.launchpad.net/bugs/1892420

Title:
  levmar uses BLAS when built with LAPACK, but Hugin does not link
  against BLAS

Status in Hugin:
  Incomplete
Status in hugin package in Gentoo Linux:
  Unknown

Bug description:
  ```
  hugin-2019.2.0/src/foreign/levmar/misc_core.c:45:#define GEMM LM_MK_BLAS_NAME(gemm)
  ```

  This function is a BLAS function:
  https://en.wikipedia.org/wiki/Basic_Linear_Algebra_Subprograms#Level_3

  Thus, since levmar is built as a static library, Hugin itself should
  call `find_package(BLAS)` and `huginbase` should link against
  `BLAS_LIBRARIES`.

  Attached patch fixes this (in an admittedly slightly crude way) for
  me.

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