code: 9ferno

ref: dd876ae00972bbb6ca6c5317eadb94041392fac9
dir: /INSTALL/

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Installing hosted Inferno from source


     Like the native kernels  emu relies on  several  auxil-
iary libraries (the source of which it often shares with the
native kernels).  Emu itself is built by the  mkfile in the
emu subdirectory containing the platform-specific source for
the host platform.  Each library has its own    mkfile;  the
various  components  are  made  in  the  right order by the
mkfile at the root of the Inferno tree.   The    mkfile  for
each  platform  will also invoke  mk recursively to make the
appropriate libraries for a given configuration.

     The Unix emu variant generally is  covered  by  `POSIX'
(with  common  extensions)  but  each Unix port has one file
that   differs   considerably   for   each   port,    namely
emu/platform/os.c, the differences corresponding to the dif-
ferent ways  under  Unix  of  implementing  kernel-scheduled
threads efficiently.

     There  are  working  emu  versions   for   FreeBSD/386,
Irix/mips,  Linux/386, NetBSD/386, MacOSX/386, MacOSX/power,
Plan 9, Solaris/sparc, and Windows (NT,  2000  and  Explorer
plug-in).   Each platform typically uses mechanisms specific
to the host operating system to implement Inferno's internal
thread/process  structure.   POSIX  threads  have often been
found to be insufficient (poorly implemented) on some  plat-
forms, and if so are avoided.  See  kproc in  emu/*/os.c.

     Source is included for ports to HP/UX  (S800  architec-
ture),  Solaris/386, and Unixware, in case someone wishes to
take them up now, but we have not determined their fitness.

     The Plan 9 hosted implementation is unusual in that  it
supports several processor types:  386,  mips,  power (Power
PC) and  sparc.  Furthermore, all versions of   emu  can  be
built on any processor type, in the usual way for Plan 9.

     Otherwise, as distributed,  emu for a platform can only
be built when running on that platform.

     One unusual variant makes the whole of Inferno a  plug-
in  for Microsoft's Internet Explorer, giving the same envi-
ronment for Inferno applications running in an HTML page  as
is  provided by hosted or native Inferno.  That is, there is
not a distinct `applet' environment with special programming
interfaces.   The  source for the various plug-in components
is found in  /tools/plugin and    /usr/internet  within  the
Inferno  tree;  they  use the version of  emu defined by the
configuration file  /emu/Nt/ie.

Build steps

     All the libraries and executables can  be  built  in  a
tree containing only the source code.  To do that for a sup-
ported variant of hosted Inferno, on Unix or Plan 9, do  the
following in the root of the Inferno tree:

1    Edit    mkconfig  to  reflect  your  host  environment,
     specifically  ROOT  (which  must  be  an  absolute path
     name), SYSHOST and OBJTYPE.  The comments in  the  file
     should help you choose.

2    Run `` to rebuild the `mk` command,  which  is
     used to build everything else.

3    Set  PATH (or  path on Plan 9)  to  include  the    bin
     directory for the platform, which will now contain the
     mk binary just built.  On Unix, export  PATH.

4    Then `mk mkdirs` to create all the missing directories.

5    Then `mk nuke` to remove any extraneous object files.

6    Finally, `mk install` to create and install   the
     libraries,    limbo  compiler,  emu for hosted Inferno,
     and auxiliary commands.  The rules do that in an  order
     that ensures that the commands or libraries needed by a
     later stage are built and installed first.  (Note  that
     a  plain   mk will not suffice, because it does not put
     the results in the search path.)

Doing something similar  on  Windows  or  Plan  9  currently
requires  the  executable  for    mk  to be available in the
search path, since there is no  equivalent  of
Otherwise  the procedure is the same.  On Plan 9, of course,
the host system's normal version of  mk should be adequate.

To build hosted Inferno for Windows/Nt you will need Microsoft Visual Studio installed. Then from the Inferno source root do:

1    Edit mkconfig

2    Add $INFERNO/Nt/386/bin to Path

3    Start Developer Command Prompt

4    `mk install`

Inferno can also be built with the provided Dockerfile:
1    `docker build -t purgatorio .`

2    `docker run -it purgatorio emu`

This will build Inferno on a small Linux base. Note that Docker sandboxes network connections by default. If you want to forward ports from the Inferno container to your host machine, you can use `docker run -p 8080:80` to forward the port 8080 (host) to the port 80 (Inferno). If you want to run graphical programs and have an Xorg server running, you have to disable network sandboxing and pass the $DISPLAY variable to Docker like this:

`docker run --net=host --env="DISPLAY" --volume="$HOME/.Xauthority:/root/.Xauthority:rw" purgatorio emu wm/wm`

This works on Linux. On Windows and MacOS you would need some kind of custom Xserver setup to make this work. Option include vcxsrv on Windows and XQuartz on MacOS.