Unable to build with builtin_cling=OFF for LLVM 9

[chrisburr]

When building with #6385 I get the following error when building with builtin_cling=OFF. I haven't investigated in detail so it could be something wrong on my part:

[ 96%] Generating G__Core.cxx, ../lib/Core.pcm
cd /home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/build-dir/core && /home/conda/feedstock_root/build_artifacts/debug_1613296575343/_build_env/bin/cmake -E env LD_LIBRARY_PATH=/home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/build-dir/lib: /home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/build-dir/core/rootcling_stage1/src/rootcling_stage1 -v2 -f G__Core.cxx -cxxmodule -s /home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/build-dir/lib/libCore.so -excludePath /home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/root-source -excludePath /home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/build-dir/ginclude -excludePath /home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/build-dir/externals -excludePath /home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/build-dir/builtins -writeEmptyRootPCM -m _Builtin_intrinsics -mByproduct _Builtin_intrinsics -mByproduct ROOT_Foundation_Stage1_NoRTTI -mByproduct ROOT_Foundation_C -mByproduct ROOT_Rtypes -D__STDC_NO_COMPLEX__ -D__COMPLEX_H__ -I/home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/build-dir/include -I/home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/build-dir/ginclude -I/home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/root-source/core/base/inc -I/home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/root-source/core/foundation/inc -I/home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/root-source/core/cont/inc -I/home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/root-source/core/gui/inc -I/home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/root-source/core/meta/inc -I/home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/root-source/core/clib/inc -I/home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/root-source/core/rint/inc -I/home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/root-source/core/zip/inc -I/home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/root-source/core/thread/inc -I/home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/root-source/core/textinput/inc -I/home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/root-source/core/clingutils/inc -I/home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/root-source/core/base/v7/inc -I/home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/root-source/core/foundation/v7/inc -I/home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/root-source/core/unix/inc -I/home/conda/feedstock_root/build_artifacts/debug_1613296575343/_h_env/include ROOT/TErrorDefaultHandler.hxx ROOT/TSequentialExecutor.hxx ROOT/StringConv.hxx Buttons.h Bytes.h Byteswap.h KeySymbols.h MessageTypes.h Riostream.h Rtypes.h TApplication.h TAtt3D.h TAttAxis.h TAttBBox2D.h TAttBBox.h TAttFill.h TAttLine.h TAttMarker.h TAttPad.h TAttText.h TBase64.h TBenchmark.h TBuffer3D.h TBuffer3DTypes.h TBuffer.h TColor.h TColorGradient.h TDatime.h TDirectory.h TEnv.h TException.h TExec.h TFileCollection.h TFileInfo.h TFolder.h TInetAddress.h TMacro.h TMathBase.h TMD5.h TMemberInspector.h TMessageHandler.h TNamed.h TNotifyLink.h TObject.h TObjString.h TParameter.h TPluginManager.h TPoint.h TPRegexp.h TProcessID.h TProcessUUID.h TQClass.h TQCommand.h TQConnection.h TQObject.h TRedirectOutputGuard.h TRefCnt.h TRef.h TRegexp.h TRemoteObject.h TROOT.h TRootIOCtor.h TStopwatch.h TStorage.h TString.h TStringLong.h TStyle.h TSysEvtHandler.h TSystemDirectory.h TSystemFile.h TSystem.h TTask.h TThreadSlots.h TTime.h TTimer.h TTimeStamp.h TUri.h TUrl.h TUUID.h TVersionCheck.h TVirtualAuth.h TVirtualFFT.h TVirtualGL.h TVirtualMonitoring.h TVirtualMutex.h TVirtualPadEditor.h TVirtualPad.h TVirtualPadPainter.h TVirtualPerfStats.h TVirtualPS.h TVirtualQConnection.h TVirtualRWMutex.h TVirtualTableInterface.h TVirtualViewer3D.h TVirtualX.h ROOT/RDirectoryEntry.hxx ROOT/RIndexIter.hxx strlcpy.h snprintf.h strtok.h ROOT/TSeq.hxx TArrayC.h TArrayD.h TArrayF.h TArray.h TArrayI.h TArrayL64.h TArrayL.h TArrayS.h TBits.h TBtree.h TClassTable.h TClonesArray.h TCollection.h TCollectionProxyInfo.h TExMap.h THashList.h THashTable.h TIterator.h TList.h TMap.h TObjArray.h TObjectTable.h TOrdCollection.h TRefArray.h TRefTable.h TSeqCollection.h TSortedList.h TVirtualCollectionProxy.h ESTLType.h RStringView.h TClassEdit.h TError.h ROOT/RIntegerSequence.hxx ROOT/RLogger.hxx ROOT/RMakeUnique.hxx ROOT/RNotFn.hxx ROOT/RSpan.hxx ROOT/RStringView.hxx ROOT/span.hxx ROOT/TypeTraits.hxx TUnixSystem.h root_std_complex.h GuiTypes.h TApplicationImp.h TBrowser.h TBrowserImp.h TCanvasImp.h TClassMenuItem.h TContextMenu.h TContextMenuImp.h TControlBarImp.h TGuiFactory.h TInspectorImp.h TObjectSpy.h TToggleGroup.h TToggle.h TBaseClass.h TClassGenerator.h TClass.h TClassRef.h TClassStreamer.h TDataMember.h TDataType.h TDictAttributeMap.h TDictionary.h TEnumConstant.h TEnum.h TFileMergeInfo.h TFunction.h TFunctionTemplate.h TGenericClassInfo.h TGlobal.h TInterpreter.h TInterpreterValue.h TIsAProxy.h TListOfDataMembers.h TListOfEnums.h TListOfEnumsWithLock.h TListOfFunctions.h TListOfFunctionTemplates.h TMemberStreamer.h TMethodArg.h TMethodCall.h TMethod.h TProtoClass.h TRealData.h TSchemaHelper.h TSchemaRule.h TSchemaRuleSet.h TStatusBitsChecker.h TStreamerElement.h TStreamer.h TVirtualIsAProxy.h TVirtualRefProxy.h TVirtualStreamerInfo.h TVirtualArray.h TVirtualObject.h Getline.h /home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/root-source/core/base/inc/LinkDef.h
fatal error: module map file '/home/conda/feedstock_root/build_artifacts/debug_1613296575343/_h_env/include/cling/module.modulemap' not found
fatal error: module map file '/home/conda/feedstock_root/build_artifacts/debug_1613296575343/_h_env/include/cling/module.modulemap' not found
fatal error: module map file '/home/conda/feedstock_root/build_artifacts/debug_1613296575343/_h_env/include/cling/module.modulemap' not found
<<< cling interactive line includer >>>: fatal error: could not build module '_Builtin_intrinsics'
Error: Module '_Builtin_intrinsics' failed to load.
fatal error: module map file '/home/conda/feedstock_root/build_artifacts/debug_1613296575343/_h_env/include/cling/module.modulemap' not found
fatal error: module map file '/home/conda/feedstock_root/build_artifacts/debug_1613296575343/_h_env/include/cling/module.modulemap' not found
fatal error: module map file '/home/conda/feedstock_root/build_artifacts/debug_1613296575343/_h_env/include/cling/module.modulemap' not found
fatal error: module map file '/home/conda/feedstock_root/build_artifacts/debug_1613296575343/_h_env/include/cling/module.modulemap' not found
Error: Error loading the default rootcling header files.
make[3]: *** [core/CMakeFiles/G__Core.dir/build.make:481: core/G__Core.cxx] Error 1
make[3]: Leaving directory '/home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/build-dir'
make[2]: *** [CMakeFiles/Makefile2:6505: core/CMakeFiles/G__Core.dir/all] Error 2
make[2]: Leaving directory '/home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/build-dir'
make[1]: *** [CMakeFiles/Makefile2:6484: core/CMakeFiles/Core.dir/rule] Error 2
make[1]: Leaving directory '/home/conda/feedstock_root/build_artifacts/debug_1613296575343/work/build-dir'
make: *** [Makefile:762: Core] Error 2

How cling was built

Cling is being built from https://github.com/vgvassilev/cling/tree/upgrade_llvm90 with two patches added:

• https://github.com/chrisburr/cling-feedstock/blob/8359ffc4aafde1fcd09ffa2caeae93600449d439/recipe/use-findpackage.patch (see Unable to build with external LLVM 9 #7176)
• https://github.com/chrisburr/cling-feedstock/blob/8359ffc4aafde1fcd09ffa2caeae93600449d439/recipe/Always-install-ClingTargets.patch

Reproducer

This should work on any machine with docker installed:

git clone https://github.com/chrisburr/root-feedstock.git -b llvm90-install-error
cd root-feedstock
export CPU_COUNT=$(nproc)
./build-locally.py --debug linux_64_numpy1.16python3.8.____cpython
# Run the line printed which will be similar to
cd xxxx && source xxxx
source /home/conda/recipe_root/build.sh
make Core VERBOSE=1 -j1

[vgvassilev]

@chrisburr, the branch went out of date for ROOT and it'd be hard to keep it up to date. I'd propose to wait until we land the upgrade PR in ROOT and then fix that if there is still something to fix. How does that sound?

[chrisburr]

Sounds good 👍

[vgvassilev]

@chrisburr, the PR was merged maybe it is time to check this if it works and possible start fixing it?

[chrisburr]

I've checked and the reproducer in the top comment is still relevant

[eguiraud]

Added the 6.24 milestone: issue is blocking the release of v6.24 conda packages

[vgvassilev]

@chrisburr will make the attached patch a PR.