hello, I am trying to port ruby to z/OS UNIX. I resolved obvious EBCDIC to ASCII problems and I encountered a problem: (1) I get a message like below: bash-2.03$ gmake ./lib/fileutils.rb:1277: [BUG] unexpected local variable (2)I know the message is from eval.c and I add some break points at eval.c and try to catch the problem. but I get another message: fu_output_message is not a class/module I am not sure if it is possible that the stack or the generation of node tree has problems. Thanks &Regards HaiJun
on 2007-07-04 11:08
on 2007-07-04 22:17
HaiJun wrote: > > I am not sure if it is possible that the stack or the generation of node > tree has problems. > > Thanks &Regards > > HaiJun > What is "z/OS UNIX"? Is it like Linux? Is it like AIX? My recollection is the latter, so if someone has experience building Ruby on AIX, they might have some clues for you.
on 2007-07-06 19:03
z/OS is a 64-bit OS that runs on IBM mainframes. z/OS "UNIX" runs on top of this as an alternative to the traditional MVS.
on 2007-07-06 20:04
shadow cipher wrote: >> > ASCII problems and I encountered a problem: >> > >> > It's been many decades since I had anything to do with IBM mainframes. But way back then, there was VM and MVS. VM was Virtual Machine, and you could run MVS as a guest under VM. There was also something called CMS that ran as a guest and was popular with scientists. And back then, I think there was a port of BSD 4.3 that ran as a guest as well. Some time later, IBM came up with a "UNIX" that looked a lot like AIX that also ran under VM. In any event, if it is "Unix" in any form, you should be able to build and run Ruby on it, although you might also need to build some of the Gnu tools and GCC to make everything play together.
on 2007-09-15 05:51
Greetings, I have built Ruby 1.8.6 on z/OS as an ASCII application. I have installed rubygems and Rails. I can run irb and ruby scripts, and I can generate a Rails application. The problem I run into is that the pseudo threads implementation in eval.c depends on a technique of stack swapping from heap that the z/OS C runtime setjmp/longjmp and getcontext/setcontext functions do not support. The C runtime insists on stack integrity. When stack_extend needs to be called, a valid chainback no longer exists. Ruby abnormally ends (abends) with a stack check exception. So long as Ruby threading is not used, e.g. in a typical script, all is well. However, running a server application, where threading is essential to support multiple clients, does not work. If the pseudo threads implementation could be replaced with pthreads, even if the pthreads were all synchronized (due to the lack of thread safety for global variable access), then I believe a z/OS implementation of the Ruby interpreter would work. I have attempted this myself, but I need some more pthread API expertise. I have built JRuby on z/OS, and it works reasonably well, if slowly. I can build and run a Rails application, and I have run it using mongrel-jruby. I have fiddled with ActiveRecord-JDBC to get this to work with DB2 on z/OS. ActiveRecord-JDBC had some problems with Rails using quoted numerics, but copying the jdbc-derby code to use with DB2 helped there. However, BLOB/CLOB support is a bit unconventional on z/OS DB2, and ActiveRecord-JDBC did not work with that (so Camping session, which uses a text type that maps to a CLOB, does not work). (Note that if you are using ibm_db from a workstation Ruby session to z/OS DB2, that Camping runs fine. BLOB/CLOB support in ibm_db is robust). I would be interested in working with folks to facilitate their efforts at Ruby on z/OS, and who could help me with the bowels of eval.c. Ruby's utility as a scripting language suggests it could offer a lot to sysprogs, dba's, and testers. It would also be helpful to write servers to provide health check info and access into the system. Rails might also be an interesting exercise there.