Error: "no member named 'getenv' in the global namespace" during the compilation with libc++

[YanzhaoW]

Check duplicate issues.

• Checked for duplicates

Description

Hi,

I'm trying to install ROOT via clang with libc++. The installation failed due to the following error:

[2130/5199] Building CXX object core/foundation/CMakeFiles/Foundation_Stage1.dir/src/FoundationUtils.cxx.o
FAILED: core/foundation/CMakeFiles/Foundation_Stage1.dir/src/FoundationUtils.cxx.o
/usr/bin/clang++-20  -I/home/yanwang/software/src/root/core/foundation/inc -I/home/yanwang/software/src/root/core/foundation/res -I/home/yanwang/software/src/root/core/cont/inc -I/home/yanwang/software/src/root/core/clingutils/res -I/home/yanwang/software/src/root/core/clingutils/inc -I/home/yanwang/software/src/root/core/clib/inc -I/home/yanwang/software/src/root/core/base/inc -I/home/yanwang/software/src/root-build/ginclude -fcolor-diagnostics -Wc++11-narrowing -Wsign-compare -Wsometimes-uninitialized -Wconditional-uninitialized -Wheader-guard -Warray-bounds -Wcomment -Wtautological-compare -Wstrncat-size -Wloop-analysis -Wbool-conversion -pipe  -Wall -W -Woverloaded-virtual -fsigned-char -pthread -stdlib=libc++ -O3 -DNDEBUG -std=c++23 -fPIC -fvisibility-inlines-hidden    -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -fno-strict-aliasing -Wwrite-strings -Wno-shadow -Wno-unused-parameter -MD -MT core/foundation/CMakeFiles/Foundation_Stage1.dir/src/FoundationUtils.cxx.o -MF core/foundation/CMakeFiles/Foundation_Stage1.dir/src/FoundationUtils.cxx.o.d -o core/foundation/CMakeFiles/Foundation_Stage1.dir/src/FoundationUtils.cxx.o -c /home/yanwang/software/src/root/core/foundation/src/FoundationUtils.cxx
/home/yanwang/software/src/root/core/foundation/src/FoundationUtils.cxx:167:36: error: no member named 'getenv' in the global namespace
  167 |       if (const char* envValue = ::getenv("ROOTSYS")) {
      |                                  ~~^
1 error generated.

Reproducer

1. download root source with git:

git clone --branch v6-36-04 --depth=1 https://github.com/root-project/root.git root

2. run cmake with the configuration:

cmake -Dlibcxx=ON -Dx11=OFF -DCMAKE_CXX_STANDARD=23 -Dbuiltin_vdt=ON -Ddavix=OFF   .

ROOT version

• ROOT: 6.36.04
• OS: ubuntu 22.04
• Compiler: clang 20.1.8
• CXX: /usr/bin/clang++-20
• CC: /usr/bin/clang-20

Installation method

From source

Operating system

Ubuntu

Additional context

No response

[ferdymercury]

Related:
https://its.cern.ch/jira/browse/ROOT-10021
#16972
#13975

[ferdymercury]

@YanzhaoW does it get solved if you add #include <stdlib.h> at the top of the file?

[YanzhaoW]

Hi, @ferdymercury

I think a better way to fix this is to use std::getenv with #include <cstdlib>. See: https://en.cppreference.com/w/cpp/utility/program/getenv.html

[ferdymercury]

If you change to std::getenv in that file, do you get compilation errors in other files or the build suceeds?

[YanzhaoW]

I think it fixes the issue. At least after the change, I didn't get this kind of error, but another kind. I'm not sure whether they are related.

So here is the new error message:

[693/3036] Generating G__Core.cxx, ../lib/Core.pcm
FAILED: core/G__Core.cxx lib/Core.pcm /home/yanwang/software/src/root-build/core/G__Core.cxx /home/yanwang/software/src/root-build/lib/Core.pcm
cd /home/yanwang/software/src/root-build/core && /usr/bin/cmake -E env LD_LIBRARY_PATH=/home/yanwang/software/src/root-build/lib: /home/yanwang/software/src/root-build/core/rootcling_stage1/src/rootcling_stage1 -v2 -f G__Core.cxx -cxxmodule -s /home/yanwang/software/src/root-build/lib/libCore.so -excludePath /home/yanwang/software/src/root -excludePath /home/yanwang/software/src/root-build/ginclude -excludePath /home/yanwang/software/src/root-build/externals -excludePath /home/yanwang/software/src/root-build/builtins -writeEmptyRootPCM -mSystemByproducts -m _Builtin_intrinsics -mByproduct _Builtin_intrinsics -mByproduct ROOT_Foundation_Stage1_NoRTTI -mByproduct ROOT_Foundation_C -mByproduct ROOT_Rtypes -DR__GETRANDOM_CLIB -D__CORRECT_ISO_CPP_WCHAR_H_PROTO -D__STDC_NO_COMPLEX__ -D__COMPLEX_H__ -D_COMPLEX_H -D__CLANG_STDATOMIC_H -compilerI/usr/include/c++/11 -compilerI/usr/include/x86_64-linux-gnu/c++/11 -compilerI/usr/include/c++/11/backward -compilerI/usr/lib/llvm-20/lib/clang/20/include -compilerI/usr/local/include -compilerI/usr/include/x86_64-linux-gnu -compilerI/usr/include -compilerI/usr/lib/llvm-20/lib/clang/20/include -compilerI/usr/local/include -compilerI/usr/include/x86_64-linux-gnu -compilerI/usr/include -I/home/yanwang/software/src/root-build/include -I/usr/include -I/home/yanwang/software/src/root-build/ginclude -I/home/yanwang/software/src/root/core/base/inc -I/home/yanwang/software/src/root/core/clib/inc -I/home/yanwang/software/src/root/core/clingutils/inc -I/home/yanwang/software/src/root/core/clingutils/res -I/home/yanwang/software/src/root/core/cont/inc -I/home/yanwang/software/src/root/core/foundation/inc -I/home/yanwang/software/src/root/core/foundation/res -I/home/yanwang/software/src/root/core/gui/inc -I/home/yanwang/software/src/root/core/meta/inc -I/home/yanwang/software/src/root/core/rint/inc -I/home/yanwang/software/src/root/core/textinput/inc -I/home/yanwang/software/src/root/core/textinput/src -I/home/yanwang/software/src/root/core/thread/inc -I/home/yanwang/software/src/root/core/zip/inc -I/home/yanwang/software/src/root/core/lzma/inc -I/home/yanwang/software/src/root-build/include -I/home/yanwang/software/src/root/core/lz4/inc -I/home/yanwang/software/src/root/core/zstd/inc -I/usr/include -I/home/yanwang/software/src/root/core/unix/inc -I/home/yanwang/software/src/root/core/unix/../clib/res -I/home/yanwang/software/src/root/builtins/xxhash -I/home/yanwang/software/src/root/builtins/lz4 ROOT/RFloat16.hxx ROOT/TErrorDefaultHandler.hxx ROOT/TExecutorCRTP.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 TVirtualMapFile.h TVirtualMutex.h TVirtualPadEditor.h TVirtualPad.h TVirtualPadPainter.h TVirtualPerfStats.h TVirtualPS.h TVirtualQConnection.h TVirtualRWMutex.h TVirtualTableInterface.h TVirtualViewer3D.h TVirtualX.h strlcpy.h snprintf.h strtok.h root_std_complex.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 ThreadLocalStorage.h ROOT/RError.hxx ROOT/RLogger.hxx ROOT/RNotFn.hxx ROOT/RRangeCast.hxx ROOT/RSpan.hxx ROOT/RStringView.hxx ROOT/StringUtils.hxx ROOT/span.hxx ROOT/TypeTraits.hxx 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 TUnixSystem.h /home/yanwang/software/src/root/core/base/inc/LinkDef.h
fatal error: module map file '/usr/lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/std.modulemap' not found
Warning in cling::IncrementalParser::CheckABICompatibility():
  Failed to extract C++ standard library version.
Warning in cling::IncrementalParser::CheckABICompatibility():
  Possible C++ standard library mismatch, compiled with _LIBCPP_ABI_VERSION '1'
  Extraction of runtime standard library version was: ''
fatal error: module map file '/usr/lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/std.modulemap' not found
fatal error: module map file '/usr/lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/std.modulemap' not found
fatal error: module map file '/usr/lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/std.modulemap' not found
fatal error: module map file '/usr/lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/std.modulemap' not found
fatal error: module map file '/usr/lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/std.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 '/usr/lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/std.modulemap' not found
fatal error: module map file '/usr/lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/std.modulemap' not found
fatal error: module map file '/usr/lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/std.modulemap' not found
fatal error: module map file '/usr/lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/std.modulemap' not found
Error: Error loading the default rootcling header files.

So I guess it's related to C++ modules.

[ferdymercury]

So I guess it's related to C++ modules.

Does it successfully build if you call cmake with runtime_cxxmodules=OFF ?

[YanzhaoW]

Still no, but with a different error:

[2850/5199] Generating G__Core.cxx, ../lib/libCore.rootmap
FAILED: core/G__Core.cxx lib/libCore.rootmap /home/yanwang/software/src/root-build/core/G__Core.cxx /home/yanwang/software/src/root-build/lib/libCore.rootmap
cd /home/yanwang/software/src/root-build/core && /usr/bin/cmake -E env LD_LIBRARY_PATH=/home/yanwang/software/src/root-build/lib: /home/yanwang/software/src/root-build/core/rootcling_stage1/src/rootcling_stage1 -v2 -f G__Core.cxx -s /home/yanwang/software/src/root-build/lib/libCore.so -excludePath /home/yanwang/software/src/root -excludePath /home/yanwang/software/src/root-build/ginclude -excludePath /home/yanwang/software/src/root-build/externals -excludePath /home/yanwang/software/src/root-build/builtins -rml libCore.so -rmf /home/yanwang/software/src/root-build/lib/libCore.rootmap -writeEmptyRootPCM -DR__GETRANDOM_CLIB -D__CORRECT_ISO_CPP_WCHAR_H_PROTO -D__STDC_NO_COMPLEX__ -D__COMPLEX_H__ -D_COMPLEX_H -D__CLANG_STDATOMIC_H -compilerI/usr/include/c++/11 -compilerI/usr/include/x86_64-linux-gnu/c++/11 -compilerI/usr/include/c++/11/backward -compilerI/usr/lib/llvm-20/lib/clang/20/include -compilerI/usr/local/include -compilerI/usr/include/x86_64-linux-gnu -compilerI/usr/include -compilerI/usr/lib/llvm-20/lib/clang/20/include -compilerI/usr/local/include -compilerI/usr/include/x86_64-linux-gnu -compilerI/usr/include -I/home/yanwang/software/src/root-build/include -I/usr/include -I/home/yanwang/software/src/root-build/ginclude -I/home/yanwang/software/src/root/core/base/inc -I/home/yanwang/software/src/root/core/clib/inc -I/home/yanwang/software/src/root/core/clingutils/inc -I/home/yanwang/software/src/root/core/clingutils/res -I/home/yanwang/software/src/root/core/cont/inc -I/home/yanwang/software/src/root/core/foundation/inc -I/home/yanwang/software/src/root/core/foundation/res -I/home/yanwang/software/src/root/core/gui/inc -I/home/yanwang/software/src/root/core/meta/inc -I/home/yanwang/software/src/root/core/rint/inc -I/home/yanwang/software/src/root/core/textinput/inc -I/home/yanwang/software/src/root/core/textinput/src -I/home/yanwang/software/src/root/core/thread/inc -I/home/yanwang/software/src/root/core/zip/inc -I/home/yanwang/software/src/root/core/lzma/inc -I/home/yanwang/software/src/root-build/include -I/home/yanwang/software/src/root/core/lz4/inc -I/home/yanwang/software/src/root/core/zstd/inc -I/usr/include -I/home/yanwang/software/src/root/core/unix/inc -I/home/yanwang/software/src/root/core/unix/../clib/res -I/home/yanwang/software/src/root/builtins/xxhash -I/home/yanwang/software/src/root/builtins/lz4 ROOT/RFloat16.hxx ROOT/TErrorDefaultHandler.hxx ROOT/TExecutorCRTP.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 TVirtualMapFile.h TVirtualMutex.h TVirtualPadEditor.h TVirtualPad.h TVirtualPadPainter.h TVirtualPerfStats.h TVirtualPS.h TVirtualQConnection.h TVirtualRWMutex.h TVirtualTableInterface.h TVirtualViewer3D.h TVirtualX.h strlcpy.h snprintf.h strtok.h root_std_complex.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 ThreadLocalStorage.h ROOT/RError.hxx ROOT/RLogger.hxx ROOT/RNotFn.hxx ROOT/RRangeCast.hxx ROOT/RSpan.hxx ROOT/RStringView.hxx ROOT/StringUtils.hxx ROOT/span.hxx ROOT/TypeTraits.hxx 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 TUnixSystem.h /home/yanwang/software/src/root/core/base/inc/LinkDef.h
Warning in cling::IncrementalParser::CheckABICompatibility():
  Failed to extract C++ standard library version.
Warning in cling::IncrementalParser::CheckABICompatibility():
  Possible C++ standard library mismatch, compiled with _LIBCPP_ABI_VERSION '1'
  Extraction of runtime standard library version was: ''
In file included from input_line_7:154:
In file included from /home/yanwang/software/src/root-build/include/TClassEdit.h:30:
/usr/lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/cxxabi.h:129:3: error: exception specification in declaration does not match previous declaration
  __cxa_atexit(void (_GLIBCXX_CDTOR_CALLABI *)(void*), void*, void*) _GLIBCXX_NOTHROW;
  ^
input_line_2:2:16: note: previous declaration is here
extern "C" int __cxa_atexit(void (*f)(void*), void*, void*) ;
               ^
Error: /home/yanwang/software/src/root-build/core/rootcling_stage1/src/rootcling_stage1: compilation failure (/home/yanwang/software/src/root-build/lib/libCore679c42e2a4_dictUmbrella.h)

This seems to come from CLING and it tries to use something from libstdc++, which is incompatible with libc++.

[ferdymercury]

This seems to come from CLING and it tries to use something from libstdc++, which is incompatible with libc++.

The ABI incompatibilities are a known problem, see https://its.cern.ch/jira/browse/ROOT-10021

You could try building with -Dminimal=ON but not sure if that will help, probably not.

@guitargeek should this JIRA issue be maybe moved to GH?

[YanzhaoW]

Thanks for your tip. But the error still persists. Also somehow I can't login to your jira ticket with my guest account.

In the meantime, I found another compilation error:

[2757/3969] Building CXX object tree/readspeed/CMakeFiles/ReadSpeed.dir/src/ReadSpeed.cxx.o
FAILED: tree/readspeed/CMakeFiles/ReadSpeed.dir/src/ReadSpeed.cxx.o
/usr/bin/clang++-20  -I/home/yanwang/software/src/root/tree/readspeed/inc -I/home/yanwang/software/src/root/core/unix/../clib/res -I/home/yanwang/software/src/root/core/unix/inc -I/home/yanwang/software/src/root/core/zstd/inc -I/home/yanwang/software/src/root/core/lz4/inc -I/home/yanwang/software/src/root-build/include -I/home/yanwang/software/src/root/core/lzma/inc -I/home/yanwang/software/src/root/core/zip/inc -I/home/yanwang/software/src/root/core/thread/inc -I/home/yanwang/software/src/root/core/textinput/src -I/home/yanwang/software/src/root/core/textinput/inc -I/home/yanwang/software/src/root/core/rint/inc -I/home/yanwang/software/src/root/core/meta/inc -I/home/yanwang/software/src/root/core/gui/inc -I/home/yanwang/software/src/root/core/foundation/res -I/home/yanwang/software/src/root/core/foundation/inc -I/home/yanwang/software/src/root/core/cont/inc -I/home/yanwang/software/src/root/core/clingutils/res -I/home/yanwang/software/src/root/core/clingutils/inc -I/home/yanwang/software/src/root/core/clib/inc -I/home/yanwang/software/src/root/core/base/inc -I/home/yanwang/software/src/root-build/ginclude -I/home/yanwang/software/src/root/io/io/inc -I/home/yanwang/software/src/root/tree/tree/inc -I/home/yanwang/software/src/root/tree/treeplayer/inc -I/home/yanwang/software/src/root/core/imt/inc -fcolor-diagnostics -Wc++11-narrowing -Wsign-compare -Wsometimes-uninitialized -Wconditional-uninitialized -Wheader-guard -Warray-bounds -Wcomment -Wtautological-compare -Wstrncat-size -Wloop-analysis -Wbool-conversion -pipe  -Wall -W -Woverloaded-virtual -fsigned-char -pthread -stdlib=libc++ -O3 -DNDEBUG -std=c++23 -fPIC -MD -MT tree/readspeed/CMakeFiles/ReadSpeed.dir/src/ReadSpeed.cxx.o -MF tree/readspeed/CMakeFiles/ReadSpeed.dir/src/ReadSpeed.cxx.o.d -o tree/readspeed/CMakeFiles/ReadSpeed.dir/src/ReadSpeed.cxx.o -c /home/yanwang/software/src/root/tree/readspeed/src/ReadSpeed.cxx
/home/yanwang/software/src/root/tree/readspeed/src/ReadSpeed.cxx:75:12: error: no member named 'terminate' in namespace 'std'; did you mean 'template'?
   75 |       std::terminate();
      |       ~~~~~^~~~~~~~~
      |            template
/home/yanwang/software/src/root/tree/readspeed/src/ReadSpeed.cxx:75:21: error: expected unqualified-id
   75 |       std::terminate();
      |                     ^
/home/yanwang/software/src/root/tree/readspeed/src/ReadSpeed.cxx:85:12: error: no member named 'terminate' in namespace 'std'; did you mean 'template'?
   85 |       std::terminate();
      |       ~~~~~^~~~~~~~~
      |            template
/home/yanwang/software/src/root/tree/readspeed/src/ReadSpeed.cxx:85:21: error: expected unqualified-id
   85 |       std::terminate();
      |                     ^
/home/yanwang/software/src/root/tree/readspeed/src/ReadSpeed.cxx:347:12: error: no member named 'terminate' in namespace 'std'; did you mean 'template'?
  347 |       std::terminate();
      |       ~~~~~^~~~~~~~~
      |            template
/home/yanwang/software/src/root/tree/readspeed/src/ReadSpeed.cxx:347:21: error: expected unqualified-id
  347 |       std::terminate();
      |                     ^
/home/yanwang/software/src/root/tree/readspeed/src/ReadSpeed.cxx:351:12: error: no member named 'terminate' in namespace 'std'; did you mean 'template'?
  351 |       std::terminate();
      |       ~~~~~^~~~~~~~~
      |            template
/home/yanwang/software/src/root/tree/readspeed/src/ReadSpeed.cxx:351:21: error: expected unqualified-id
  351 |       std::terminate();
      |                     ^
/home/yanwang/software/src/root/tree/readspeed/src/ReadSpeed.cxx:355:12: error: no member named 'terminate' in namespace 'std'; did you mean 'template'?
  355 |       std::terminate();
      |       ~~~~~^~~~~~~~~
      |            template
/home/yanwang/software/src/root/tree/readspeed/src/ReadSpeed.cxx:355:21: error: expected unqualified-id
  355 |       std::terminate();
      |                     ^
/home/yanwang/software/src/root/tree/readspeed/src/ReadSpeed.cxx:359:12: error: no member named 'terminate' in namespace 'std'; did you mean 'template'?
  359 |       std::terminate();
      |       ~~~~~^~~~~~~~~
      |            template
/home/yanwang/software/src/root/tree/readspeed/src/ReadSpeed.cxx:359:21: error: expected unqualified-id
  359 |       std::terminate();
      |                     ^
/home/yanwang/software/src/root/tree/readspeed/src/ReadSpeed.cxx:368:12: error: no member named 'terminate' in namespace 'std'; did you mean 'template'?
  368 |       std::terminate();
      |       ~~~~~^~~~~~~~~
      |            template
/home/yanwang/software/src/root/tree/readspeed/src/ReadSpeed.cxx:368:21: error: expected unqualified-id
  368 |       std::terminate();
      |                     ^
14 errors generated.

Add #include <exception> to the file ReadSpeed.cxx should fix the problem.

PS: is clang with libc++ not supported by ROOT? Or this is just a problem for latest versions?