Hi Roderick,

> I am the chairman of the Dutch OS/2 VOICE organisation. On OS/2 we had
> the port of QT 4.78 for OS/2. A port of QT 5.13 took about 12 months by
> on person working 40 hours a week. So a 32 bit platform is supported by QT.
> 
> https://github.com/bitwiseworks/qt5-os2

That is valuable information, thank you!

> I also do not know if you would need a GCC compiler for DOS ?

There is DJGPP (by Delorie) which is GCC / G++ for DOS and comes
with a nice 32-bit DPMI oriented GNU C library. So ports of text
oriented tools such as dosfsck are smooth if one is a bit lucky.

Depending on how far OS/2 is from DOS in the areas needed by QT,
the next step of porting, from OS/2 to DOS, might be ... easier?

> this is starting to sound like a mission impossible.

To be honest, I think it would be far more realistic to port some
e-book library for whichever formats are desired, such as EPUB and
have a command line tool to open and read e-books one at a time.

While Calibre sounds great for organizing your collection along
with metadata search and management, it would require too much
graphics and Python support. But then, you probably know that a
FLTK (lightweight GUI library) port for DOS exists, which made
it possible to have DOS versions of some nice apps in XFDOS:

https://sourceforge.net/projects/fltk-dos/

This includes the Dillo web browser, FLWriter, FlMail and some
spreadsheet program. There also is nanolinux, which uses Nano X
and FLTK to create a tiny Linux with GUI.

So it is possible to do impressive ports of GUI apps to DOS.

Regards, Eric

PS: There also is the HX DOS extender which supports a set of
basic Windows interfaces, including GUI, directly in DOS. This
made it possible to run "easy" Windows apps from the DOS prompt.

See also https://github.com/Baron-von-Riedesel :-)



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