Bug 727130 – sci-libs/volk-2.3.0 - CMake Error at CMakeLists.txt:128 (message): Mako templates required to build VOLK

• Status: RESOLVED FIXED
• Product: Gentoo Linux

[Description AI0867 2020-06-04 13:36:05 UTC]

Created attachment 643416 [details]
emerge --info '=sci-libs/volk-2.3.0::gentoo'

Building volk 2.3.0 because CMake cannot find mako.

Mako 1.1.2 is installed, but it is only installed for python 2.7 and 3.7, while the volk build uses python 3.8. I believe that is the issue.

Relevant part of emerge output:

-- Found PythonInterp: /usr/bin/python (found suitable version "3.8.2", minimum required is "3") 
-- 
-- Python checking for python >= 3.4
-- Python checking for python >= 3.4 - found
-- 
-- Python checking for mako >= 0.4.2
-- Python checking for mako >= 0.4.2 - not found
CMake Error at CMakeLists.txt:128 (message):
  Mako templates required to build VOLK

[Comment 1 Jeroen Roovers (RETIRED) 2020-06-05 06:29:59 UTC]

Please attach the entire build log to this bug report.

[Comment 2 AI0867 2020-06-05 07:01:35 UTC]

Created attachment 643508 [details]
volk build log

[Comment 3 Michiel Derhaeg 2020-06-05 23:29:06 UTC]

Encountered the same issue.
Indeed caused by the CMake trying to use python 3.8 instead of 3.7.
Only the latter has Mako installed.

Setting `-DPYTHON_EXECUTABLE` when invoking CMake to the correct `python3.7` binary fixed it for me.

[Comment 4 Rick Farina (Zero_Chaos) 2020-06-08 16:58:43 UTC]

This should be fixed in -r1, apologies for -r0, it was...poor.