There is still a top-level directory in the Texinfo distribution called "djgpp". I don't remember any reports from anybody building or running Texinfo on DJGPP. All the mailing list posts I could find on it are from over 10 years ago. I don't know if Texinfo would still build on this platform.
We still have a comment in configure.ac: AC_CONFIG_HEADERS([config.h:config.in])dnl Keep filename to 8.3 for MS-DOS. I doubt this is relevant any more as many of the filenames are much longer, especially in texi2any. I very much doubt that the package could be built on a system with 8.3 length filenames (although I am not sure to what extent DJGPP programs could use longer filenames). Unless there are reports that a recent release of Texinfo acually builds and runs on DJGPP (most relevant would be releases with the Perl texi2any, after version 5.0) and that this is useful to somebody, then I would propose removing the code that purports to support it. This would be the "djgpp" subdirectory and a small amount of platform-conditional code elsewhere.
