Failed to build clang-7.0 on Big Sur

[rodmur (Dale Harris)]

when updating outdated packages, clang-7.0 failed to build with the following error:

--->  Configuring clang-7.0
--->  Building clang-7.0
Error: Failed to build clang-7.0: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_llvm-7.0/clang-7.0/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets to report a bug.
--->  Some of the ports you installed have notes:
  libomp has the following notes:
    To use this OpenMP library:
     * For clang-3.8+, or clang-3.7 with +openmp variant:
        add "-fopenmp" during compilation / linking.
     * For clang-3.7 without +openmp variant, use:
        "-I/opt/local/include/libomp -L/opt/local/lib/libomp -fopenmp"

[rodmur (Dale Harris)]

/opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_llvm-7.0/clang-7.0/main.log gziped

[kencu (Ken)]

I wasn't really planning on trying to fix clang-7.0 for BigSur. Do you need it for something, or is it just an update from before?

If you don't specifically need it, please uninstall it (and llvm-7.0) and use clang 9.0 ,10, or 11 -- those are all working on Big Sur.

I suppose I should formally block these from installing on BigSur once we sort out exactly what fails where.

[rodmur (Dale Harris)]

No, I don't really need it. I was just doing a default update. I'll uninstall it.

[bnilsson11]

I am trying to install Ngspice, and it is dependent on clang-7.0. Consequently, the installation of Ngspice fails on clang-7.0. Should I file a ticket on Ngspice to use clang-9.0 instead?

BN

[bnilsson11]

I am trying to install Ngspice, and it is dependent on clang-7.0. Consequently, the installation of Ngspice fails on clang-7.0. Should I file a ticket on Ngspice to use clang-9.0 instead?

BN

[kencu (Ken)]

Oh yes, if there isn't already. We have a newer mechanism for calling in libomp that is more resilient that what ngspice is doing.

I'd suggest you edit the Portfile to use clang-11, 10, or 9.0 on BigSur while we fix that.

Or don't use openmp for now.

[kencu (Ken)]

Here you go: <​https://github.com/macports/macports-ports/pull/9492>

fixes the openmp part, and also bumps it up to the current version 33.

go ahead and check out that commit, or we'll wait 72h and if no response from maintainer, we'll push this.

[kencu (Ken)]

ngspice was updated to use the current base openmp defaulting.