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VMSINSTALL
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1992-11-12
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* Installing GNU Emacs from a VMS install kit
If you receive a VMS distribution tape containing an install kit, you can
restore Emacs and run it immediately on any VMS system 4.2 or newer. The
installation command file will automatically rename certain files whose
names must vary according to the version of VMS in use.
However, it is not certain we will have the install kit developed soon, so
until that is done, you may receive an ordinary BACKUP saveset instead.
* Installing GNU Emacs from an ordinary VMS BACKUP saveset
If you receive a VMS distribution tape in VMS BACKUP interchange format you
can restore Emacs and run it on VMS versions 4.2 or newer after executing a
few commands. What you must do depends on the VMS version (one procedure
for VMS 4.2 or 4.3; another procedure for newer VMS versions).
For VMS versions 4.4 and up, make sure the file SYS$SYSTEM:RIGHTSLIST.DAT
has WORLD:R access. Emacs reads this file to check file access.
[Is this necessary? I can't find any reference to this in the source.
-rbr, 7 Nov 92]
In order to compile Emacs with the VMS C compiler, you will need a pagefile
quota of around 22000 pages, plus enough swap space to handle that. (This
was in VMS 5.1-1, with 5 meg of physical memory.) See HELP SYSGEN CREATE
and HELP SYSGEN INSTALL for more information.
Choose a directory to restore to, say DEV:[LIB]. Do:
$ mount/foreign mta0:
$ backup/log mta0: dev:[lib...]
Now, if you are using VMS version 4.4 or later, set your default to the
directory DEV:[LIB.EMACS] and run the command file
DEV:[LIB.EMACS.VMS]ALLRENAME.COM:
$ set default dev:[lib.emacs]
$ @[.vms]allrename [...] "_" "-"
This renames all files in the Emacs distribution from their old-VMS names
(containing `_' characters) to their new-VMS names (containing `-' instead).
Now execute the command file DEV:[LIB.EMACS.VMS]EMACS.COM. This defines a
command EMACS that runs a suspendable permanent Emacs. To fully install
Emacs, you must arrange for users to run this file on login, or arrange for
this file to be run when the system boots.
The distribution contains an Emacs executable in DEV:[LIB.EMACS]EMACS.EXE.
It uses DEV:[LIB.EMACS]EMACS.DUMP every time it runs. The EMACS.EXE has
been linked with the non-sharable C library, so it should run on any VMS
V4.4+ system, whether or not the C compiler exists. The .OBJ files are all
there, so you can relink with /DEBUG if you want to have fun.
A few C source files contain compilation conditionals that depend on the
version of VMS. We have compiled these files specially for VMS version
4.2 (or 4.3) in object files with extension .JBO. So to run on VMS 4.2,
rename all the .JBO files to .OBJ, then link and build Emacs as described
in DEV:[LIB.EMACS.VMS]VMSBUILD.
$ set default [.src]
$ rename *.jbo *.obj
$ set default [-.vms]
$ @link
$ @build
$ rename temacs.exe [-]emacs.exe
$ rename temacs.dump [-]emacs.dump
To be clean, you should also edit the file [.SRC]CONFIG.H to #include the
file [.s]VMS4_2.H instead of [.s]VMS-4-4.H. Then the proper conditionals
will be activated if you ever recompile.
* Moving a Unix distribution to VMS.
Moving a Unix distribution to VMS is mostly a matter of transferring the
files to the VMS system, but with old versions of VMS (prior to 4.4) it is a
little more complicated because some of the file names used on Unix are not
supported by VMS. Every `-' in a Unix file name must be changed to a `_' on
VMS. (In VMS versions 4.4 and up, this is not necessary, since `-' is
allowed in file names.)
A few other changes must be made regardless of the version of VMS:
1) Copy the file [.SRC]VMSPATHS.H to [.SRC]PATHS.H, replacing any existing
file PATHS.H in that directory.
2) Delete any file [.SRC]CONFIG.H and replace it with a copy of
CONFIG.H_IN. Then edit this file so it specifies `[.m]vax.h' as the
second include file and for the first include file one of
`[.s]vms4-0.h', `[.s]vms4-2.h' or `[.s]vms4-4.h'. (Use the highest
version not greater than the VMS version you are running. For VMS
versions prior to 4.4, the `-' characters must be replaced with `_'.)
You can now compile, link, build and install Emacs as described in
[.VMS]VMSBUILD..
* Moving a VMS distribution to Unix.
Delete all .OBJ files, and PATHS.H and CONFIG.H. Then copy the remaining
files, changing each `_' in a file name to `-`. Unix will allow filenames
with `_' but Emacs will not work with them!
Names which on VMS end in a period (have a null extension) should have no
period on Unix. Thus, "YMAKEFILE." becomes "ymakefile".
VMS file names are case-insensitive. On Unix, case is significant. Most of
the file names must be in lower case or they will not work. There are only
a few exceptions:
1) CHANGELOG. becomes ChangeLog
2) MAKEFILE. becomes Makefile
3) TAGS. becomes TAGS
4) Files of English text with null extensions keep their names in upper
case. For example, README. becomes README and [.ETC]GNU. becomes GNU