Bug#949767: arrayfire update fails in configure step

[Gard Spreemann]

Andreas Tille <tille at debian.org> writes:

> Hi Aaron,
>
> On Tue, Apr 27, 2021 at 08:14:10PM -0400, Aaron M. Ucko wrote:
>> Please try adding a build dependency on libclfft-dev and replacing
>> src/backend/opencl/CMakeLists.txt's inclusion of build_clFFT with a call
>> to
>> 
>>   find_package(clFFT)
>> 
>> > Thanks a lot for your initial hint
>
> Thanks again.  I now tried to learn from this and added a similar patch
> for CLBLast[1] but as you can see in the new log[2] it is not that
> simple.  I tried to compare the content of
> libclfft-dev_2.12.2-3.1_amd64.deb and libclblast-dev_1.5.2-1_amd64.deb
> how the cmake files under /usr/lib/x86_64-linux-gnu/cmake/ are looking
> like and I need to admit I have no idea why this fails.

This seems to be just a typo on my part. The logs have

***
CMake Warning at CMakeModules/build_CLBlast.cmake:8 (find_package):
  By not providing "FindCLBLast.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "CLBLast", but
  CMake did not find one.
  Could not find a package configuration file provided by "CLBLast" with any
  of the following names:
    CLBLastConfig.cmake
    clblast-config.cmake
  Add the installation prefix of "CLBLast" to CMAKE_PREFIX_PATH or set
  "CLBLast_DIR" to a directory containing one of the above files.  If
  "CLBLast" provides a separate development package or SDK, be sure it has
  been installed.
***

libclblast-dev ships

 /usr/lib/x86_64-linux-gnu/cmake/CLBLast/CLBlastConfig.cmake

Notice that there's both "CLBLast" and "CLBlast" in there! I'll
investigate.

 Best,
 Gard