root6 @6.14.04 +veccore: fatal error: 'VecCore/VecCore' file not found

[olupton (Olli Lupton)]

I have the following variant of the root6 port @6.14.04_0+clang60+cocoa+cxx17+gcc8+gsl+http+minuit2+opengl+python37+roofit+root7+soversion+ssl+tmva+vc+veccore+xml+xrootd

Code that links against this now fails to compile with errors such as:

In file included from /opt/local/libexec/root6/include/root/Math/Minimizer.h:20:
In file included from /opt/local/libexec/root6/include/root/Math/Util.h:27:
/opt/local/libexec/root6/include/root/Math/Types.h:22:10: fatal error: 'VecCore/VecCore' file not found
#include <VecCore/VecCore>
         ^~~~~~~~~~~~~~~~~
1 error generated.

The problem seems to be that the VecCore headers are installed at a higher level in the directory structure than the other ROOT headers:

$ ls /opt/local/libexec/root6/include/
VecCore root

So even if the correct ROOT include directory

$ root-config --incdir
/opt/local/libexec/root6/include/root

is in the include path, the VecCore headers that ROOT's own headers request cannot be found.

As a minimal workaround, making /opt/local/libexec/root6/include/root/VecCore be a symlink to /opt/local/libexec/root6/include/VecCore seems to fix the compilation errors.

[ryandesign (Ryan Carsten Schmidt)]

It's been years since this ticket was filed. Is this still a problem with the current version of root6 and the +veccore variant?