Re: C on z/OS questions -- Thanks!
To all those who lended their hands and knowlege, thank you. The information provided was of great worth and I was able to get the routine linked and callable in the manner I needed. A special thanks to Anyd Robertson for his examples. Those examples made all the difference in the project. Again, thank you to all who responded. John Stephens On Tuesday 21 March 2006 12:09, john stephens wrote: Hey all, I have recently inhereted an application that was written in C on a Win32 / AIX platform that needs to be moved up to the mainframe (z/OS V1R4.0). I have never had to use the C compiler on the MF and to say I am confused would be an understatment. I know I am missing some connecting dots. In order to compile the routine we have had to replace all our square brackets with trigraphs and digraphs. I know there has to be a compile option that pretty much emululates a win32 or AIX environment as far as acceptable chars. Also, this routine is going to be used as a called subroutine by both Assembler and COBOL. In the Win32 envirionnment, I don't need a 'main' section and I can compile it into a .dll thereby making it unique and callable. However, on the MF I can't get past the compile without a 'main'. And linking is another problem... sigh... I'm looking for a boost up here. Is there someone on the list who would be willing to help me work through some of the issues I'm having? Many Many thanks in advance. John Stephens -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: C on z/OS questions
On Tuesday 21 March 2006 20:26, Shmuel Metz (Seymour J.) wrote: In [EMAIL PROTECTED], on 03/21/2006 at 01:47 PM, john stephens [EMAIL PROTECTED] said: I need to be able to have this routine dynamically linked at run time if/when the user requries. Dynamically linked from what? Why can't you use a DLL? Well herein lies part of my problem, I don't know whats available to use on z/OS. Can I create a DLL? How do I? Can a DLL be called from a COBOL program running in batch mode via JCL? Can it be called from Assembler? How? If these questions sound elementry its becuase they are. I have been out of the sysprog arena for over 10 years and z/OS passed me up a long time ago. I've gone to the manuals and all of them assume a working familiarity with z/OS which I don't have. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: C on z/OS questions
On Tuesday 21 March 2006 20:21, Shmuel Metz (Seymour J.) wrote: In [EMAIL PROTECTED], on 03/21/2006 at 12:09 PM, john stephens [EMAIL PROTECTED] said: In order to compile the routine we have had to replace all our square brackets with trigraphs and digraphs. Why? It sounds like you're using the wrong code page. What code page should I be using and how do I specify it? -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: C on z/OS questions
On Wednesday 22 March 2006 04:09, Andy Robertson wrote: On Tue, 21 Mar 2006 13:47:20 -0500, john stephens [EMAIL PROTECTED] snip. This is static not dynamic linkage but bear with me We faced similar problems to you with the additional constraint that we had to call our dynamically loadable subroutines from Assembler, Cobol, non-LE-compliant assembler, and C mains, all of them pre-existing and some calling old routines written in assembler or COBOL which we wanted to replace by C routines of the same name. Some of these calls used dynamic COBOL load, some used the LOAD macro. We could not use DLL because you can't mix DLLs and COBOL dynamic load in one run unit. Our solution was to wrap our C routines in a small COBOL wrapper, then they look to everything like COBOL. You just call your C code from a cobol program (as above) but you make the COBOL program a subroutine and call the COBOL subroutine from your mainlines.Inelegant but works robustly. If you can create a new clean run time environment and you have no assembler you can go for DLL on MVS (I can show you how to do this as well). c Andy, Thank you. This is a tremendous help. A couple of questions. What is the purpose of the pre-link steps and under what conditions (if any) are they required / optional? I would prefer to have the stub program be in assembler. Can I assume that standard rules apply (ie. loading parm list at R1 and BALR R14,R15 or BASSM R14,R15)? -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
C on z/OS questions
Hey all, I have recently inhereted an application that was written in C on a Win32 / AIX platform that needs to be moved up to the mainframe (z/OS V1R4.0). I have never had to use the C compiler on the MF and to say I am confused would be an understatment. I know I am missing some connecting dots. In order to compile the routine we have had to replace all our square brackets with trigraphs and digraphs. I know there has to be a compile option that pretty much emululates a win32 or AIX environment as far as acceptable chars. Also, this routine is going to be used as a called subroutine by both Assembler and COBOL. In the Win32 envirionnment, I don't need a 'main' section and I can compile it into a .dll thereby making it unique and callable. However, on the MF I can't get past the compile without a 'main'. And linking is another problem... sigh... I'm looking for a boost up here. Is there someone on the list who would be willing to help me work through some of the issues I'm having? Many Many thanks in advance. John Stephens jls(at)jkstephensdotnet -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: C on z/OS questions
On Tuesday 21 March 2006 12:20, Andy Robertson wrote: On Tue, 21 Mar 2006 12:09:58 -0500, john stephens [EMAIL PROTECTED] wrote: I'm looking for a boost up here. Is there someone on the list who would be willing to help me work through some of the issues I'm having? Many Many thanks in advance. John Stephens jls(at)jkstephensdotnet We use C on the mainframe. We find it more convenient to use trigraphs than mess about with code pages, so I can't help you there, but we use compiled functions statically linked to Cobol mainlines. What are you trying to do? What I have is a single routine that recieves a buffer and returns a 2D data matrix barcode in the same buffer. I need to be able to have this routine dynamically linked at run time if/when the user requries. Therefore, I need to be able to compile and link this routine without a 'main'. I can live with the di/tri-graphs if need be. As far as linking goes, the JCL I was given has a compile proc step, a pre-link proc step and a link proc step. Unfortunatly, neither of the last two will run cleanly. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
