| Title: | DIGITAL UNIX (FORMERLY KNOWN AS DEC OSF/1) |
| Notice: | Welcome to the Digital UNIX Conference |
| Moderator: | SMURF::DENHAM |
| Created: | Thu Mar 16 1995 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 10068 |
| Total number of notes: | 35879 |
Hi all.
Supposing I've a working version X how can I (my customer) build
applications or works as I'm in a different and lower, X-1, version?
This is a real problem that keep moving the AlphaServer 8400, the
production system, to V4.x,now distributed from long time, but they
need to mantain and support applications based on previous versions,
even 3.2c.
This was managed with 'logical names' under VMS.
I've thought to chroot(1) as starting point, changing to a directory
containing the /usr/lib and /usr/include of the old version and then
running scripts for makefile and the like, but may be your
experience can help better. Please give me a guidelines or pointer,
with some theory behind.
Best regards,
Gabriele
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 9301.1 | QUARRY::metsky | I'm hysterical and I'm wet | Wed Mar 26 1997 16:05 | 27 | |
What you are attempting is fraught with peril. It's not impossible, just very difficult. In general, you can't build on version X and expect to run on version X-1. That is, an executable built with libraries and include files from version X will probably have problems (too numerous to mention) when running on a system at version X-1. What you're talking about is possible, but you have to make sure that your faithfully recreate the ENTIRE version X-1 build environment. This includes libraries, include files, linkers, compilers, crt0, etc. Make sure that you are picking up nothing from the base system. The resulting executable will run on a version X system when using the version X runtime libraries, or on a version X-1 with version X-1 libraries. If you try to mix the libraries and the system (especially libc and libpthread) all bets are off. This is basically what the ODE environment in ZK3 does to build our system, but we still find problems. It's not a trivial task. If it were me, I'd keep a disk with V3.2C around and boot it when I needed to build a V3.2C executable. Support issues for this may be very difficult as well. You'll need the ability to recreate the environment that was used to build the executables. Good luck, you'll need it. -dave- | |||||
| 9301.2 | What we do... | DECWET::DIPIETRO | Thu Mar 27 1997 09:39 | 3 | |
We keep the old OS loaded on a spare disk. When we need to build on the old OS, we reboot using the old version. Not an elegant solution, but effective. | |||||
| 9301.3 | VELENO::MICHIELI | Is IBM DEClining? | Thu Mar 27 1997 11:48 | 7 | |
Thank you all for previous reply.
I aggree on the difficult tasks and the best way is to have a apre old
version from where to boot. Easy when you have a workstation, not so
with a depatmental system like an 8400 with lot of users.
Thank you all again,
Gabriele.
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