[bug #68603] [octave forge] (parallel) Fails to build with GCC 16

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URL:
  <https://savannah.gnu.org/bugs/?68603>

                 Summary: [octave forge] (parallel) Fails to build with GCC 16
                   Group: GNU Octave
               Submitter: svillemot
               Submitted: sam. 08 août 2026 14:56:22
                Category: Octave Package
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
             Assigned to: None
         Originator Name:
        Originator Email:
             Open/Closed: Open
         Discussion Lock: Unlocked
                 Release: other
        Operating System: Any
           Fixed Release: None
         Planned Release: None


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Follow-up Comments:


-------------------------------------------------------
Date: sam. 08 août 2026 14:56:22    By: Sébastien Villemot <svillemot>
Hi,

The parallel package fails to build with GCC 16, because it embeds an outdated
Autoconf macro that incorrectly detects the C++ standard support of GCC 16.

The fix consists in removing the file src/m4/std-gnu11.m4, and removing the
following lines in src/configure.ac:

if test "x$ac_prog_cxx_stdcxx" != "xcxx11"; then
  AC_MSG_ERROR([could not enforce using C++11 features])
fi


See this Debian bug report for the full build log failure:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1133588







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