Hi Bruce, > > 1) It will cause a link error for all programs that define the > > 'program_name' > > variable, on all non-ELF platforms (mainly MacOS X and Woe32).
... and HP-UX, which also is a non-ELF platform. > Not having MacOS or Woe32, I couldn't know. There is some code for determining the program's name ad-hoc for MacOS X and Woe32 in progreloc.c. But for HP-UX, I don't know... If you don't have access to these systems and no one else find a good solution, then you will likely have to document: "Before using libposix, you have to invoke set_program_name(argv[0]);" and add the module 'progname' to libposix. I think that's an acceptable compromise: many users of gnulib have done the same for the last 7 years. > > 2) Substituting "unknown" instead of a real program name will not help the > > end user. > > Seg faulting is even less friendly. A seg fault is a very clear hint to the developer that he needs to fix up his code. Which IMO is the only good solution if a programmer has not defined program_name. Bruno
