"Undefined Symbol" error while running script in ROOT

[JHarrop]

No, I’m still receiving an error though it’s slightly different now that I’ve regenerated the library. From what it seems like, the new " Warning in cling::IncrementalParser::CheckABICompatibility():**" message at least has been addressed before on these forums (One of which I linked below). I have recently updated the compiler similar to the link from GCC version 4.8.5 to GCC 10.2.0. Does this mean I would have to recompile root with the updated compiler? Or is there another approach I can take similar to the solution for the post I linked? Or is this even be the main cause of the problem in the first place?

[SOLVED] IncrementalParser::CheckABICompatibility()

Dear users, I’ve just moved from ubuntu 15 to ubuntu 18.04 LTS. ROOT was indeed compiled with the compiler that I had on the ubuntu 15 version (no idea of how to retreive which one it was). [\code] Now when trying to compile the easiest code I get: Warning in cling::IncrementalParser::CheckABICompatibility(): C++ ABI mismatch, compiled with GLIBCXX v20151010 running with v20180720 [\code] and then a nice segmentation fault. I’ve seen this post: and I understand that the compiler I …

[root@phy-nuc Covariance_Related_Scripts]# root draw_strips.cc++
   ------------------------------------------------------------------
  | Welcome to ROOT 6.22/02                        https://root.cern |
  | (c) 1995-2020, The ROOT Team; conception: R. Brun, F. Rademakers |
  | Built for linuxx8664gcc on Aug 17 2020, 12:46:52                 |
  | From tags/v6-22-02@v6-22-02                                      |
  | Try '.help', '.demo', '.license', '.credits', '.quit'/'.q'       |
   ------------------------------------------------------------------

root [0] 
Processing draw_strips.cc++...
Info in <TUnixSystem::ACLiC>: creating shared library /home/rutca/FEHversion/Ph2_ACF/Covariance_Related_Scripts/./draw_strips_cc.so 
 Warning in cling::IncrementalParser::CheckABICompatibility():**
 Possible C++ standard library mismatch, compiled with __GLIBCXX__ '20150623'**
 Extraction of runtime standard library version was: '20200723'**
cling::DynamicLibraryManager::loadLibrary(): /home/rutca/FEHversion/Ph2_ACF/Covariance_Related_Scripts/draw_strips_cc.so: undefined symbol: _ZN5TROOT14RegisterModuleEPKcPS1_S2_S1_S1_PFvvERKSt6vectorISt4pairINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEiESaISD_EES2_b
/lib/../lib64/crt1.o: In function `_start':
(.text+0x20): undefined reference to `main'
/home/rutca/FEHversion/Ph2_ACF/Covariance_Related_Scripts/draw_strips_cc_ACLiC_dict.o: In function `(anonymous namespace)::TriggerDictionaryInitialization_draw_strips_cc_ACLiC_dict_Impl()':
/home/rutca/FEHversion/Ph2_ACF/Covariance_Related_Scripts/draw_strips_cc_ACLiC_dict.cxx:86: undefined reference to `TROOT::RegisterModule(char const*, char const**, char const**, char const*, char const*, void (*)(), std::vector<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, int>, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, int> > > const&, char const**, bool)'
collect2: error: ld returned 1 exit status
root [1] .q