‘string_view’ is not a member of ‘std’ error. c++ version error?

[Wile_E_Coyote]

Installation of a software dependent on root

I guess there is a mismatch in the C++ language standard used by different libraries (i.e. GammaCombo and ROOT). You need to make sure that the same “-std=...” C++ compiler flag is used when building all your software. One of the first flags in the output of “root-config --cflags” is " -std=..." (and this tells you what C++ language standard your ROOT binaries were built with). Looking at your first screenshot, I can see “HAS_CPP17 - Success”. This may suggest that the GammaCombo is using “-s…

TString.h Comilation errors due to C++ version despite ROOT having been compiled with correct version

It could be that your “some code” needs some special flag. It could also be that it does not support “c++17” at all (e.g., it supports at most “c++14” or “c++11”). For example, newer Geant 4 supports (note also “=14”): cmake -DGEANT4_BUILD_CXXSTD=14 Older Geant 4 supports (note also “=c++11”): cmake -DGEANT4_BUILD_CXXSTD=c++11