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Date:      Tue, 20 Jun 2023 18:56:06 +0000
From:      bugzilla-noreply@freebsd.org
To:        ports-bugs@FreeBSD.org
Subject:   [Bug 272101] math/cbc: fix build with clang 16
Message-ID:  <bug-272101-7788@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D272101

            Bug ID: 272101
           Summary: math/cbc: fix build with clang 16
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: Individual Port(s)
          Assignee: yuri@freebsd.org
          Reporter: dim@FreeBSD.org
          Assignee: yuri@freebsd.org
             Flags: maintainer-feedback?(yuri@freebsd.org)

Since clang 16 (and gcc 11) the default C++ standard is now gnu++17.
Because math/cbc's build infrastructure does not explicitly set its C++
standard, this leads to errors:

  ./CbcSymmetry.hpp:83:30: error: ISO C++17 does not allow 'register' stora=
ge
class specifier [-Wregister]
      inline void color_vertex(register int k) { color =3D k; }
                               ^~~~~~~~~
  ./CbcSymmetry.hpp:91:24: error: ISO C++17 does not allow 'register' stora=
ge
class specifier [-Wregister]
      inline void bounds(register double a, register double b)
                         ^~~~~~~~~

To work around the error, add USE_CXXSTD=3Dgnu++11 to compile for C++11
with GNU extensions instead.

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