__ROOFIT_NOBANNER=ON CMake option seems to have no effect

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 \
  -Droot7=ON \
  -Dfortran=OFF \
  -Droofit=ON \
  -Droostats=ON \
  -Dhistfactory=ON \
  -Dminuit2=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).

Please read tips for efficient and successful posting and posting code

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


I think this should work:


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



1 Like

Thanks @moneta. Indeed, the simple addition of


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

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