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.

#ifndef HELPGEN_H
#define HELPGEN_H

struct topic; // from topic.h

void help_addtopic(struct topic *);

// in cout.c
void cout(const char *path, struct topic **topics, int ntopics);

// in htmlout.c
void htmlout(const char *path, struct topic **topics, int ntopics);

// in readhelp.syn
void load(const char *path);

#endif /* HELPGEN_H */