Bug#949767: arrayfire update fails in configure step

[Aaron M. Ucko]

Andreas Tille <andreas at an3as.eu> writes:

> /usr/bin/ld: cannot find -lpthreads

Thanks for posting a link to the full log!  AFAICT, the actual errors
appear much earlier, on lines 1573-1593:

  CMake Error: File /builds/science-team/arrayfire/debian/output/source_dir/extern/forge/CMakeModules/version.h.in does not exist.
  CMake Error at CMakeModules/AFconfigure_forge_submodule.cmake:47 (configure_file):
    configure_file Problem configuring file
  Call Stack (most recent call first):
    CMakeLists.txt:117 (include)
  CMake Error at CMakeLists.txt:163 (add_subdirectory):
    add_subdirectory given source "extern/spdlog" which is not an existing
    directory.
  CMake Error at CMakeLists.txt:164 (add_subdirectory):
    add_subdirectory given source "extern/glad" which is not an existing
    directory.
  -- Performing Test has_ignored_attributes_flag
  -- Performing Test has_ignored_attributes_flag - Success
  -- Performing Test has_all_warnings_flag
  -- Performing Test has_all_warnings_flag - Success
  CMake Error at /usr/share/cmake-3.18/Modules/ExternalProject.cmake:2350 (message):
    error: could not find git for clone of clFFT-ext
  Call Stack (most recent call first):
    /usr/share/cmake-3.18/Modules/ExternalProject.cmake:3206 (_ep_add_download_command)
    CMakeModules/build_clFFT.cmake:33 (ExternalProject_Add)
    src/backend/opencl/CMakeLists.txt:15 (include)

The subsequent output consists of dumps of CMake's internal logs, which
sometimes provide additional clues but need to be taken in context; for
instance, the -lpthreads error comes from

  -- Looking for pthread.h
  -- Looking for pthread.h - found
  -- Performing Test CMAKE_HAVE_LIBC_PTHREAD
  -- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
  -- Looking for pthread_create in pthreads
  -- Looking for pthread_create in pthreads - not found
  -- Looking for pthread_create in pthread
  -- Looking for pthread_create in pthread - found
  -- Found Threads: TRUE  

(ll. 1472-1480).

-- 
Aaron M. Ucko, KB1CJC (amu at alum.mit.edu, ucko at debian.org)
http://www.mit.edu/~amu/ | http://stuff.mit.edu/cgi/finger/?amu@monk.mit.edu