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Bash 4.2.39 now available for OpenVMS Alpha/I64


From: John E. Malmberg
Subject: Bash 4.2.39 now available for OpenVMS Alpha/I64
Date: Sun, 16 Dec 2012 09:51:14 -0600
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:16.0) Gecko/20121010 Thunderbird/16.0.1

Bash 4.2.39 is now available for OpenVMS.

Pre-built PCSI kits are at:

 ftp://encompasserve.org/gnv/axp0830/   Alpha 8.3 kits
 ftp://encompasserve.org/gnv/axp0840/   Alpha 8.4 kits
 ftp://encompasserve.org/gnv/i640840/   Itanium 8.4 kits

The kits include the source code and build procedures.

This version does not support Job Control as that can not be easily implemented on OpenVMS at this time.

Coprocess and network socket support were not implemented in this release to save time in debugging and testing. It is not known how hard it will be to implement these features.

The Bash 1.14.8 port to OpenVMS was originally done by Douglas B. Rupp, and at some time in past was added to the sourceforge GNV project.

As this Port is not the same as a GNU bash build, the release notes are directing users to reproduce their bugs on a Linux build of bash before reporting it to the bash-bugs e-mail address. The bashbug script was not provided as with these kits as it could not be made to run on OpenVMS due to issues with the native VMS editors.

OpenVMS specific bugs should be reported to the tracker at https://sourceforge.net/projects/gnv/

The build procedure only uses tools that are either supplied by OpenVMS free for Hobbyist or Alliance One use, or can easily be obtained pre-built for OpenVMS. This is to allow building the initial GNU set of GNU tools with out having a copy of them already implemented.

The building procedure uses search lists, support routines, and TPU editing scripts, which makes it easier to keep the OpenVMS releases current with the GNU releases.

Now that I have a working release, I would like to know if it is possible to get the changes and code needed for building Bash on OpenVMS into the GNU bash repository.

The OpenVMS port, including the code needed to build PCSI kits (RPM equivalent) has 80 modules in it. 12 of those are TPU editor scripts.

Most of the TPU editor scripts are to compensate for for OpenVMS not having a fork() call, to insert code to save and restore selected Bash variables. Also there are some differences in how I/O is done that required a source change.

That algorithm was based on the older Bash 1.14.8 port of Bash which as near as I can tell was based on GNU Bash 1.14.7 support for MS-DOS, which also does not have a fork.

Some TPU scripts are used to fix minor issues with the port, such as bashline.c not using the a header file for tputs() and a different definition than what was needed for OpenVMS in lib readline.

If the end result of the script is acceptable for checking into the source, then checking in the TPU script would not be needed.

I have not been able to determine how to pull down the periodic tarballs from the bash source repository to attempt building them on VMS. Currently I am not sure of how functional the Bison port on VMS is, so I can not directly build from the repository. The autoconfigure step probably will not run on OpenVMS either.

For those that want to look at the source, you can examine or check out the OpenVMS specific changes in the http://gnv.cvs.sourceforge.net/gnv/ cvs tree from the gnu_vms/bash tree with the cvs tag gnv-bash-V0402-39e0. At this time that is the same as latest version of the files.

These changes are done in conjunction with the actual GNU bash sources, a copy of these are in cvs for GNV project in the gnu/bash tree with the cvs tag gnv-bash-V0402-39e0.

While it should be possible to modify the build procedure to build on VAX/VMS, this has not been attempted yet. The major issue is that the VAX/VMS filesystem does not support some of the file names as-is in the GNU source tree, so some special case code will be need in the Bash.mms (VMS makefile equivalent).

Regards,
-John
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