This is my experimental HP-UX 10.20 repo.

  _   _ ____       _   ___  __  _  ___   ____   ___  
 | | | |  _ \     | | | \ \/ / / |/ _ \ |___ \ / _ \ 
 | |_| | |_) |____| | | |\  /  | | | | |  __) | | | |
 |  _  |  __/_____| |_| |/  \  | | |_| | / __/| |_| |
 |_| |_|_|         \___//_/\_\ |_|\___(_)_____|\___/ 
                                                    

I have compiled from source all the /usr/local stuff that can be found here 
GCC 4.2.2 is present in the usr.local.tar.gz bundle 
Use at your own risk ;) 

autoconf-2.69
automake-1.12.6
automake-1.15.1
bash-5.0
binutils-2.14
bison-2.5.1
bitchx-1.2.1
byacc-20191103
curl-7.32.0
db-3.2.9
dopewars-1.5.12
flex-2.5.4
gawk-3.1.8
gc6.0
gettext-0.14.3
gettext-0.18.3
gperf-3.1
gtk+-1.2.10
gzip-1.6
libiconv-1.12
libidn-1.16
libpng-1.6.37
libtool-2.4
libunistring-0.9.4
links-2.20.2
m4-1.4.18
make-4.2
ncurses-5.4
ncurses-6.1
nethack-3.6.0
openssh-7.5p1
openssl-1.0.2t
pax_global_header
pkg-config-0.24
prngd-0.9.29
pth-2.0.7
readline-8.0.001
SDL-1.2.15
SDL_mixer-1.2.12
sed-4.2
termcap-1.3.1
zlib-1.2.11
dosbox-0.74-3 

The dosbox is heavily modified (no network support since I could not still get SDL_net to compile properly on HP-UX 10.20