Hans Åberg wrote: > (As for the Makefile might have 'CXX = g++': My GCC7 is not named 'g++-7'.)
Indeed. That was left over from my various tests. > The option > %define extra_header_prefix {calc-c++17-} > does not seem to work: I got both location.hh and position.hh. Ah, sorry, I think you need to apply my original patch from http://lists.gnu.org/archive/html/bug-bison/2018-03/msg00058.html as well. It patches location.cc which is otherwise unchanged in the new skeleton. I will clarify this. Regards, Frank