Hi Alan, I do not have any experience building Open MPI with the new “flang” compiler from the LLVM project (previously known as f18), but I successfully built an Open MPI 4.0.5 with the legacy “flang” compiler on top of LLVM 9.0.0. If your users’ requirement for LLVM is not strongly linked on LLVM 11.x versions, you can find tips on how to build this flang compiler here : https://github.com/flang-compiler/flang/wiki/Building-Flang
Regards, Marc ---- Marc Sergent HPC Runtime Systems Expert BDS R&D HPC & Big Data SW T: +33 (0) 4 76 29 81 31 Bull an Atos Company 1 Rue de Provence 38130 Echirolles, France De : users <users-boun...@lists.open-mpi.org> De la part de Alan Wild via users Envoyé : vendredi 16 octobre 2020 01:54 À : users@lists.open-mpi.org Cc : Alan Wild <a...@madllama.net> Objet : [OMPI users] Anyone try building openmpi 4.0.5 w/ llvm 11 Caution! External email. Do not open attachments or click links, unless this email comes from a known sender and you know the content is safe. More specifically building the new “flang” compiler and compiling openmpi with the combination of clang/flang rather than clang/gfortran. Configure is passing (including support for 16 byte REAL and COMPLEX types. However there is one file that uses REAL128 and CONPLE(REAL128) and I’m getting type in supported KIND=-1 errors. (Quick aside I’m surprised that the one file is using the ISO_FORTRAN_ENV type names but configure is only checking for the non-standard REAL*# names. Feels like an oversight to me.) From what I’ve been able to find (and reading their iso_fortran_env.f90 module file the compiler should support the two types. I barely know enough FORTRAN to be dangerous (took one semester of F77 in like 1996) so I’m not really sure what I’m looking at here or what to try next. I would really like to provide an openmpi build to my users that is a “pure LLVM” build. -Alan -- a...@madllama.net<mailto:a...@madllama.net> http://humbleville.blogspot.com<https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fhumbleville.blogspot.com%2F&data=04%7C01%7Cmarc.sergent%40atos.net%7C1cfbc066cd354fdd98c708d8750ec18c%7C33440fc6b7c7412cbb730e70b0198d5a%7C0%7C0%7C637388053522802777%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=ZKEfJYQlM%2BZbrgYXar9MwVfkzgVRK0R20Hx%2BU0q3yGk%3D&reserved=0>
