Date: Sun, 17 Oct 1999 14:17:29 +0200 (IST) From: Eli Zaretskii X-Sender: eliz AT is To: "A. Darrow" cc: djgpp AT delorie DOT com Subject: Re: Newbie frustration: headers not found In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Reply-To: djgpp AT delorie DOT com X-Mailing-List: djgpp AT delorie DOT com X-Unsubscribes-To: listserv AT delorie DOT com Precedence: bulk On Thu, 14 Oct 1999, A. Darrow wrote: > Forgive me for belaboring what is probably obvious > to you, but how can a truncated DOS filename be > found by a program reference to a LFN? (e.g. > how will DJGPP find a file called streambuf.h, > the program reference, if it resides in dggpp\ > lang\cxx as streambu.h?) Does Windows/DOS > automatically truncate the call? Yes, DOS transparently truncates file name to 8+3 limits. This truncation happens as part of the file-name canonicalization, whereby the default drive and directory are prepended to a relative file name. All DOS file-oriented functions call the canonicalization function before they do anything. When you run on plain DOS, or disable LFN support on Windows 9X, the long names are truncated. When LFN support is enabled, DJGPP programs issue calls to a special set of LFN-aware DOS functions, which are supported only by Windows 9X, and which do NOT truncate the names during canonicalization. > Additionally, the documentation says the > recommended setup (use in a DOS box) should > work and it does not on my machine. I really > do not need the dual setup and I can only > be alarmed that LFN=y does not seem to work > on my system. You shouldn't need the dual setup, if all you want is to run DJGPP programs from the Windows DOS box with long file-name support enabled. Anyone who tells you otherwise is mistaken, or doesn't understand the real problem in your case. > As an aside, my registry did not contain the > "NameNumericTail" binary but it did contain > the entry "PreserveLongNames" ff ff ff ff. > If that strikes a chord please let me know. I don't have such an entry, but I don't think it should matter.