DOS ain't dead - how to create small DJGPP binaries?

how to create small DJGPP binaries? (Developers)

posted by roytam, 14.01.2013, 04:52

> This is a discussion that could go on forever. Unfortunately, most people
> aren't interested, hence the difficulty in discovering good answers (sigh).
> Honestly, I wouldn't worry too too hard about it unless you're just super
> obsessed! ;-) BTW, OpenWatcom can indeed make smaller (esp. 16-bit)
> binaries, but it depends on what you're trying to do, how standard (C89,
> C99) you need support and how much OpenWatcom supports (esp. libc).
>
> Here's just some rough ideas off the top of my head:
>
> * check linker map (mkdir() function pulling in ctime.o without reason?)
> * recompile (parts of) libs with -Os or -O1 ("ar rvs libblah.a smaller.o")
> * recompile (parts of) libs with stripped functionality or hand-written
> assembly
> * avoid printf (and related) in lieu of _dos_write (etc.)
> * use empty cmdline glob function
> * 2.03p2 (no true symlink support in libc)
> * strip ("gcc -s" or "ld -s" or "strip blah.exe")
> * compare various (-O1 or -Os or -O2) with UPX --ultra-brute --small
> * -fomit-frame-pointer
> * -fno-align-functions, -fno-align-labels, -fno-align-loops,
> -fno-align-jumps
> * -march=i386, -march=i486, -march=i586
> * don't bind DPMI host, use default 2 kb stub, leave CWSDPMI separate

How many of these you did in your djgpp203.7z?

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Complete thread:

how to create small DJGPP binaries? - roytam, 11.01.2013, 06:52 (Developers)
- how to create small DJGPP binaries? - RayeR, 11.01.2013, 10:56
  - how to create small DJGPP binaries? - roytam, 12.01.2013, 14:27
- how to create small DJGPP binaries? - Laaca, 11.01.2013, 16:18
  - how to create small DJGPP binaries? - RayeR, 11.01.2013, 19:26
    - how to create small DJGPP binaries? - georgpotthast, 11.01.2013, 22:27
      - how to create small DJGPP binaries? - Arjay, 12.01.2013, 12:43
        how to create small DJGPP binaries? - RayeR, 12.01.2013, 21:35
        how to create small DJGPP binaries? - marcov, 14.01.2013, 09:48
- how to create small DJGPP binaries? - Rugxulo, 13.01.2013, 21:25
  - how to create small DJGPP binaries? - roytam, 14.01.2013, 04:52
    - how to create small DJGPP binaries? - Rugxulo, 14.01.2013, 15:30
  - how to create small DJGPP binaries? - roytam, 28.10.2021, 16:03
    - how to create small DJGPP binaries? - kerravon, 28.10.2021, 21:45
      - how to create small DJGPP binaries? - roytam, 29.10.2021, 14:38
        how to create small DJGPP binaries? - kerravon, 29.10.2021, 15:54
        how to create small DJGPP binaries? - tkchia, 30.10.2021, 07:29
    - how to create small DJGPP binaries? - Rugxulo, 01.11.2021, 14:03