__ROOFIT_NOBANNER=ON CMake option seems to have no effect

ROOT
1

Hi. In 2009 it was noted that

you can now disable the generation of these messages if you compile RooFit code with the flag -D__ROOFIT_NOBANNER.

However, engaging __ROOFIT_NOBANNER in CMake options

cmake \
  -Dall=OFF \
  -Dsoversion=ON \
  -Dgsl_shared=ON \
  -DCMAKE_CXX_STANDARD=17 \
  -Droot7=ON \
  -Dfortran=OFF \
  -Droofit=ON \
  -Droostats=ON \
  -Dhistfactory=ON \
  -Dminuit2=ON \
  -D__ROOFIT_NOBANNER=ON \
  -Dxrootd=ON \
  -Dbuiltin_xrootd=OFF \
  -DXROOTD_ROOT_DIR=/usr/local/venv/bin \
  -Dvdt=ON \
  -Dbuiltin_vdt=ON \
  -Dpyroot=ON \
  -DPYTHON_EXECUTABLE=$(which python3) \
  -DCMAKE_INSTALL_PREFIX=/usr/local/venv \
  -S root_src \
  -B build

seems to have no effect as

$ python -c 'from ROOT import RooRealVar'

will still raise the RootFit banner.

What does work, is adding RooFit.Banner: no to a user’s .rootrc file, as advocated for in this commit from 2015

as seen in this example

$ docker run --rm -ti atlasamglab/stats-base:root6.24.06 
root@8912dae62d22:~/data# python -c 'from ROOT import RooRealVar'  # Get banner

RooFit v3.60 -- Developed by Wouter Verkerke and David Kirkby 
                Copyright (C) 2000-2013 NIKHEF, University of California & Stanford University
                All rights reserved, please read http://roofit.sourceforge.net/license.txt

root@8912dae62d22:~/data# echo 'RooFit.Banner: no' > ~/.rootrc
root@8912dae62d22:~/data# python -c 'from ROOT import RooRealVar'  # No banner now

(This is perhaps of interest to @gwatts given his question in 2012.)

It would still be desirable to globally disable the banner at compile time, though. Do people have any thoughts why -D__ROOFIT_NOBANNER=ON in CMake seems to have no effect?

For reference, the last time the code that deals with __ROOFIT_NOBANNER was edited was in 2021 in

when it was moved to roofit/roofitcore/src/Initialisation.cxx (which made it into release v6.24/06).

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_ROOT Version: 6.24/06
Platform: Debian bullseye
Compiler: g++ (Debian 10.2.1-6) 10.2.1 20210110

2

Hi,

I think this should work:

cmake -DCMAKE_CXX_FLAGS:="-D__ROOFIT_NOBANNER=1"

Otherwise you can just edit the file and define the variable there

Cheers

Lorenzo

1 Like
3

Thanks @moneta. Indeed, the simple addition of

-DCMAKE_CXX_FLAGS=-D__ROOFIT_NOBANNER

resolved feat: Disable RooFit banner with CMAKE_CXX_FLAGS option __ROOFIT_NOBANNER (!63) (!63) · Merge requests · atlas-amglab / atlstats for me. Thanks!

4

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