Adjust to the moving target called the C++ standard. Apparently nowadays it's not allowed to define an explicit copy constructor but not an assignment operator. Consequently, defining the explicit copy constructor in terms of the implicit/automatic assignment operator for general convenience no longer works. Add assignment operators. Caution: not tested with the IBM compiler, but there's no particular reason it shouldn't work.

here
#line 12 "there.c"
there
#line 15
elsewhere
#line 2
and so on

#define WHERE(l,f) x #y
#line WHERE(10, line.c)
and back