> On 10 Aug 2023, at 9:24 pm, Rick Troth <tro...@gmail.com> wrote: > > > ... 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. > > Come again? > Are you saying that object code for this platform produced by one compiler > is incompatible with object code for this platform produced by the other > compiler?
I’m not 100% sure about the ABI but the C++ library is different. It’s a port of clang which is open source. IBM are committing z/OS LLVM/clang port upstream. > > The broken compiler "can only be used for open source", but open source > aficionados would surely use the alternative when compiling their wares. > Free as in speech, not just free as in beer. IBM don’t really do altruism on z/OS. Although you can download Python (and Node, golang etc) and use them free of charge. However, if you want to install a Python library that requires a C/C++ compiler to build extensions and you don’t have the paid for XL C/C++ product then this compiler will fill the gap. You can also use it to contribute to open source projects on z/OS but nothing else. Seems reasonable to me, it’s better than nothing. > > Perhaps the broken compiler should come with a surgeon general's warning. > (A meaningful reference in the US where cigarette packaging has, now for > decades, been required to state "this product is bad for you".) > > We continue further down the rabbit hole of software being used for > controlling people rather than software being used for controlling machines. > > -- R; <>< > > > On 8/9/23 02:58, David Crayford 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 lists...@listserv.ua.edu with the message: INFO IBM-MAIN > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN