Problem building root 6.22.06 from source

[cpruneau]

Using CMAKE and the root source distribution to build the code. The build fails as per the below.

[ 54%] Building CXX object tree/tree/CMakeFiles/Tree.dir/src/TTreeRow.cxx.o

[ 54%] Building CXX object tree/tree/CMakeFiles/Tree.dir/src/TTreeSQL.cxx.o

[ 54%] Building CXX object tree/tree/CMakeFiles/Tree.dir/src/TVirtualIndex.cxx.o

[ 54%] Building CXX object tree/tree/CMakeFiles/Tree.dir/src/TVirtualTreePlayer.cxx.o

[ 54%] Linking CXX shared library …/…/lib/libTree.so

[ 54%] Built target Tree

[ 54%] Generating G__TreePlayer.cxx, …/…/lib/TreePlayer.pcm

In file included from input_line_16:34:

/Users/claudeapruneau/Documents/GitHub/root/build-root-6.22.06/include/TMPWorkerTree.h:15:10: remark: building module ‘MultiProc’ as ‘/Users/claudeapruneau/Documents/GitHub/root/build-root-6.22.06/lib/MultiProc.pcm’ [-Rmodule-build]

#include “TMPWorker.h”

^

Error: Had to build non-system module MultiProc implicitly. You first need to

generate the dictionary for MultiProc or mark the C++ module as a system

module if you provided your own system modulemap file:

MultiProc [system] { … }

make[2]: *** [tree/treeplayer/G__TreePlayer.cxx] Error 1

make[1]: *** [tree/treeplayer/CMakeFiles/G__TreePlayer.dir/all] Error 2

make: *** [all] Error 2

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_ROOT Version: 6.22.06
_Platform: MacOs 11.1
_Compiler:clang-1200.0.32.29

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[eguiraud]

Hi @cpruneau ,
I am not sure what might cause this error (@Axel @vvassilev ?) but unless you really have to, I would suggest to not build ROOT from source but instead install it through a package manager such as conda, macports or homebrew, see also root.cern/install .

It might also be useful if you could attach the full cmake output (configuration + build) and the full cmake commands you used.

Cheers,
Enrico

[vvassilev]

Looks like we are missing a dependency. Could you add MultiProc to root/CMakeLists.txt at master · root-project/root · GitHub and see if that fixes it?

[cpruneau]

Hi Enrico
Thanks… I do not really have to… So I also tried to download using HomeBrew and that appears to work. The reason I got to this point is that I was trying to call MathMore Bessel function in version 6.18 and my calls were all returning zeros… Fingers crossed now…
Best
Claude