diff -ur root-6.18.00.orig/bindings/pyroot/ROOT.py root-6.18.00/bindings/pyroot/ROOT.py

--- root-6.18.00.orig/bindings/pyroot/ROOT.py	2019-06-25 10:52:11.000000000 +0200

+++ root-6.18.00/bindings/pyroot/ROOT.py	2019-06-26 15:14:34.684257765 +0200

@@ -449,9 +449,7 @@

 # This function is injected as method to the respective classes in Pythonize.cxx.

 _root._RDataFrameAsNumpy = _RDataFrameAsNumpy

-# This Pythonisation is there only for 64 bits builds

-if (sys.maxsize > 2**32): # https://docs.python.org/3/library/platform.html#cross-platform

-    _root.CreateScopeProxy( "TTree" ).AsMatrix = _TTreeAsMatrix

+_root.CreateScopeProxy( "TTree" ).AsMatrix = _TTreeAsMatrix

 ### RINT command emulation ------------------------------------------------------

diff -ur root-6.18.00.orig/bindings/pyroot/test/CMakeLists.txt root-6.18.00/bindings/pyroot/test/CMakeLists.txt

--- root-6.18.00.orig/bindings/pyroot/test/CMakeLists.txt	2019-06-25 10:52:11.000000000 +0200

+++ root-6.18.00/bindings/pyroot/test/CMakeLists.txt	2019-06-26 15:22:03.843577496 +0200

@@ -4,10 +4,7 @@

 ROOT_ADD_PYUNITTEST(pyroot_rvec rvec.py)

 if(NUMPY_FOUND)

   ROOT_ADD_PYUNITTEST(pyroot_array_interface array_interface.py)

-  # this excludes RDF for 32 bits builds because of clang/gcc abi issues

-  if( CMAKE_SIZEOF_VOID_P EQUAL 8 )

-    ROOT_ADD_PYUNITTEST(pyroot_rdataframe_asnumpy rdataframe_asnumpy.py)

-    ROOT_ADD_PYUNITTEST(pyroot_ttree_asmatrix ttree_asmatrix.py)

-  endif()

+  ROOT_ADD_PYUNITTEST(pyroot_rdataframe_asnumpy rdataframe_asnumpy.py)

+  ROOT_ADD_PYUNITTEST(pyroot_ttree_asmatrix ttree_asmatrix.py)

 endif()

diff -ur root-6.18.00.orig/build/unix/makepchinput.py root-6.18.00/build/unix/makepchinput.py

--- root-6.18.00.orig/build/unix/makepchinput.py	2019-06-25 10:52:11.000000000 +0200

+++ root-6.18.00/build/unix/makepchinput.py	2019-06-26 15:14:34.760256972 +0200

@@ -263,9 +263,6 @@

                            "math/vdt",

                            "tmva/rmva"]

-   if (sys.platform != 'win32' and sys.maxsize <= 2**32): # https://docs.python.org/3/library/platform.html#cross-platform

-      PCHPatternsBlacklist.append("tree/dataframe")

-

    accepted = isAnyPatternInString(PCHPatternsWhitelist,dirName) and \

                not isAnyPatternInString(PCHPatternsBlacklist,dirName)

diff -ur root-6.18.00.orig/cmake/scripts/ROOTConfig.cmake.in root-6.18.00/cmake/scripts/ROOTConfig.cmake.in

--- root-6.18.00.orig/cmake/scripts/ROOTConfig.cmake.in	2019-06-25 10:52:11.000000000 +0200

+++ root-6.18.00/cmake/scripts/ROOTConfig.cmake.in	2019-06-26 15:14:34.768256889 +0200

@@ -83,7 +83,7 @@

   set(CMAKE_FIND_LIBRARY_PREFIXES "lib")

   set(CMAKE_FIND_LIBRARY_SUFFIXES ".lib" ".dll")

 endif()

-foreach(_cpt Core Imt RIO Net Hist Graf Graf3d Gpad ROOTDataFrame Tree TreePlayer Rint Postscript Matrix Physics MathCore Thread MultiProc ${ROOT_FIND_COMPONENTS})

+foreach(_cpt Core Imt RIO Net Hist Graf Graf3d Gpad ROOTDataFrame ROOTVecOps Tree TreePlayer Rint Postscript Matrix Physics MathCore Thread MultiProc ${ROOT_FIND_COMPONENTS})

   find_library(ROOT_${_cpt}_LIBRARY ${_cpt} HINTS ${ROOT_LIBRARY_DIR})

   if(ROOT_${_cpt}_LIBRARY)

     mark_as_advanced(ROOT_${_cpt}_LIBRARY)

diff -ur root-6.18.00.orig/config/root-config.in root-6.18.00/config/root-config.in

--- root-6.18.00.orig/config/root-config.in	2019-06-25 10:52:11.000000000 +0200

+++ root-6.18.00/config/root-config.in	2019-06-26 15:41:39.518330743 +0200

@@ -72,15 +72,10 @@

 newlib="-lNew"

 rootglibs="-lGui"

 rootevelibs="-lEve -lEG -lGeom -lGed -lRGL"

-rootlibs="-lCore -lImt -lRIO -lNet -lHist -lGraf -lGraf3d -lGpad -lROOTVecOps -lTree -lTreePlayer\

+rootlibs="-lCore -lImt -lRIO -lNet -lHist -lGraf -lGraf3d -lGpad -lROOTDataFrame -lROOTVecOps -lTree -lTreePlayer\

           -lRint -lPostscript -lMatrix -lPhysics -lMathCore -lThread\

           -lMultiProc"

-if [ "@UNIX@" != "1" ] || [ "@CMAKE_SIZEOF_VOID_P@" != "4" ]; then

-   rootlibs="$rootlibs -lROOTDataFrame"

-fi

-

-

 if test "$platform" = "win32"; then

    rootulibs="-include:_G__cpp_setupG__Net        \

               -include:_G__cpp_setupG__IO         \

diff -ur root-6.18.00.orig/tree/dataframe/CMakeLists.txt root-6.18.00/tree/dataframe/CMakeLists.txt

--- root-6.18.00.orig/tree/dataframe/CMakeLists.txt	2019-06-25 10:52:11.000000000 +0200

+++ root-6.18.00/tree/dataframe/CMakeLists.txt	2019-06-26 15:14:34.827256273 +0200

@@ -3,11 +3,6 @@

 # @author Danilo Piparo CERN, Pere Mato CERN

 ############################################################################

-# Disable RDataFrame on 32-bit UNIX platforms due to ROOT-9236

-if(UNIX AND CMAKE_SIZEOF_VOID_P EQUAL 4)

-  return()

-endif()

-

 if(arrow)

   list(APPEND RDATAFRAME_EXTRA_HEADERS ROOT/RArrowDS.hxx)

   list(APPEND RDATAFRAME_EXTRA_INCLUDES -I${ARROW_INCLUDE_DIR})

diff -ur root-6.18.00.orig/tutorials/CMakeLists.txt root-6.18.00/tutorials/CMakeLists.txt

--- root-6.18.00.orig/tutorials/CMakeLists.txt	2019-06-25 10:52:11.000000000 +0200

+++ root-6.18.00/tutorials/CMakeLists.txt	2019-06-26 15:18:15.834951333 +0200

@@ -212,10 +212,6 @@

                  v7/ntuple/ntpl004_dimuon.C)

 endif()

-if( CMAKE_SIZEOF_VOID_P EQUAL 4 )

-  set(bits32_veto dataframe/*.C graphs/timeSeriesFrom*.C v7/ntuple/ntpl004_dimuon.C)

-endif()

-

 #---These ones are disabled !!! ------------------------------------

 set(extra_veto

   htmlex.C

@@ -266,7 +262,6 @@

              ${classic_veto}

              ${pythia_veto}

              ${root7_veto}

-             ${bits32_veto}

              ${xrootd_veto}

              )

@@ -424,13 +419,6 @@

   list(REMOVE_ITEM pytutorials ${pyveto})

-  if( CMAKE_SIZEOF_VOID_P EQUAL 4 )

-    set(bits32_veto_py dataframe/*.py)

-    file(GLOB bits32_veto_py RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} dataframe/*.py)

-    list(REMOVE_ITEM pytutorials ${bits32_veto_py})

-    list(REMOVE_ITEM pytutorials pyroot/pyroot002_TTreeAsMatrix.py)

-  endif()

-

   #---Python tutorials dependencies--------------------------------------

   set(pyroot-ntuple1-depends tutorial-pyroot-hsimple-py)

   set(pyroot-h1draw-depends tutorial-pyroot-hsimple-py)