> > zoslib has been available for a few years now.. > Have you used it?
Yes, to port something. Not a hugely complex undertaking, I should add. > > as I believe it's available with xlclang. > I would no if it did. We’ve discussed this with the IBM compiler team in ISV > technical disclosure meetings. There are library implementations that use > pthreads. Cool, sounds like you know what you're doing, and are doing something about it (the gaps you mention) already. I'm sure you know this too already... that open source works by pitching in, and aligning on common goals. ------- Original Message ------- On Thursday, August 10th, 2023 at 8:30 AM, David Crayford <[email protected]> wrote: > > On 9 Aug 2023, at 3:08 pm, kekronbekron > > [email protected] wrote: > > > > Thanks for your notes. > > > > On more compilers - when working through a transition, intermediates are a > > small price to pay. > > In the end xlclang and regular clang (which will have zOS bits upstreamed) > > may be the only two remaining. > > > > zoslib has been available for a few years now.. > > > Have you used it? > > > What is a thunk routine? > > > https://github.com/ibmruntimes/zoslib/blob/cc10b7c1d6211a2c28b10b540bf406c7148fbf4f/src/zos.cc#L1892 > > > Thread-local-storage must be coming… > > > It’s my understanding that it requires binder work so I wouldn’t expect it > any time soon. > > > as I believe it's available with xlclang. > > > I would no if it did. We’ve discussed this with the IBM compiler team in ISV > technical disclosure meetings. There are library implementations that use > pthreads. > > https://github.com/ibmruntimes/zoslib/blob/main/src/zos-tls.cc > > > ------- Original Message ------- > > On Wednesday, August 9th, 2023 at 12:28 PM, David Crayford > > [email protected] wrote: > > > > > As if we didn’t already have enough z/OS C/C++ compilers :) > > > > > > I've recently been working on Python bindings for z/OS products and > > > wanted to share some useful notes. IBM recently released the IBM C/C++ > > > for Open Enterprise Languages on z/OS compiler [1], a free version of IBM > > > Open XL C/C++, which is a port of LLVM/clang. This compiler can only be > > > used for open source. For example, to build Python, Node, go packages > > > that require a build phase when installed or contributing to z/OS open > > > source projects. It's important to note that the IBM Open XL C/C++ > > > compiler is not compatible with XL C/C++ or xlclang compilers. This > > > incompatibility may pose challenges. Python 3.11 is developed using IBM > > > Open XL C/C++, while Python 3.10 uses xlclang. As a result, binary > > > packages created for Python 3.10 won't work with the IBM Open XL C/C++ > > > compiler. > > > To overcome this issue, the recommended solution is to build Python > > > distributions that include the source C/C++ code. During the installation > > > process using pip, this code can be built. There are a few issues with > > > the new compiler. Firstly, there is no support for "OS" linkage, meaning > > > no #pragma linkage(module,OS) or extern 'OS' {}. Custom thunk routines > > > need to be written to address this. Additionally, the compiler supports > > > inline assembly, but the -qasmlib=<macro-library> option is not > > > available, making macros unusable. A workaround I found is to assemble > > > some HLASM code and copy-paste from the listing. > > > > > > Moreover, the runtime library is not entirely compatible with XL C/C++. I > > > discovered that the __amrc structure is missing, which breaks my pzfile > > > package and makes accessing VSAM files nearly impossible. I plan to open > > > a case with IBM to address this issue. > > > Another limitation is that the compiler does not produce source/assembly > > > listings. Furthermore, thread level storage is not supported, which > > > complicates the process of porting certain libraries. > > > > > > On a positive note, IBM has open-sourced their zoslib library [2], which > > > assists in porting applications to z/OS. There is a lot of useful > > > function in this library. It supports dynamically loading and calling > > > modules using thunk routines. Unfortunately, there is a comment in the > > > code which states it only works with xlclang. The library is Apache 2.0 > > > licensed but it has IBM copyright. I'm not a lawyer so I'm unsure of the > > > legalities of using this library for product code. > > > > > > [1] > > > https://www.ibm.com/docs/en/cloud-paks/z-modernization-stack/2023.2?topic=languages-cc-open-enterprise-zos > > > [2] https://github.com/ibmruntimes/zoslib > > > > > > ---------------------------------------------------------------------- > > > For IBM-MAIN subscribe / signoff / archive access instructions, > > > send email to [email protected] with the message: INFO IBM-MAINz > > > > ---------------------------------------------------------------------- > > For IBM-MAIN subscribe / signoff / archive access instructions, > > send email to [email protected] with the message: INFO IBM-MAIN > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
