protoize.c: Conditionally include unistd.h.

protoize.c: Conditionally include unistd.h.

2000-01-06  Mumit Khan  <khan@xraylith.wisc.edu>

	* protoize.c: Conditionally include unistd.h.
	(IS_SAME_PATH_CHAR): New macro.
	(IS_SAME_PATH): New macro.
	(CPLUS_FILE_SUFFIX): New macro.
	(cplus_suffix): New static variable.
	(is_abspath): New static function.
	(in_system_include_dir): Handle DOS style pathnames.
	(file_could_be_converted): Likewise.
	(file_normally_convertible): Likewise.
	(directory_specified_p): Likewise.
	(file_excluded_p): Likewise.
	(abspath): Likewise.
	(shortpath): Likewise.
	(referenced_file_is_newer): Likewise.
	(save_def_or_dec): Likewise.
	(do_processing): Likewise.
	(main): Likewise.
	(edit_file): Likewise. Use rename instead of link.
	(rename_c_file): Likewise. Don't rename syscalls file.
	(munge_compile_params): Define null device for DOS based systems.
	(process_aux_info_file): Use binary mode if appliable.
	(edit_file): Likewise.
	* invoke.texi (Running Protoize): Document C++ suffixes used.

From-SVN: r31265