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Date:      Wed, 09 Oct 2024 18:59:43 +0000
From:      bugzilla-noreply@freebsd.org
To:        ports-bugs@FreeBSD.org
Subject:   [Bug 281974] x11-toolkits/mygui: fix build with libc++ 19
Message-ID:  <bug-281974-7788@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D281974

            Bug ID: 281974
           Summary: x11-toolkits/mygui: fix build with libc++ 19
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: Individual Port(s)
          Assignee: amdmi3@FreeBSD.org
          Reporter: dim@FreeBSD.org
             Flags: maintainer-feedback?(amdmi3@FreeBSD.org)
          Assignee: amdmi3@FreeBSD.org

As noted in the libc++ 19 release notes [1], std::char_traits<> is now
only provided for char, char8_t, char16_t, char32_t and wchar_t, and any
instantiation for other types will fail.

This causes x11-toolkits/mygui to fail to compile with clang 19 and
libc++ 19, resulting in errors similar to:

  In file included from
/wrkdirs/usr/ports/x11-toolkits/mygui/work/mygui-MyGUI3.4.2/MyGUIEngine/inc=
lude/MyGUI_Common.h:12:
  /usr/include/c++/v1/string:820:42: error: implicit instantiation of undef=
ined
template 'std::char_traits<unsigned short>'
    820 |   static_assert(is_same<_CharT, typename
traits_type::char_type>::value,
   y     |                                          ^
=20
/wrkdirs/usr/ports/x11-toolkits/mygui/work/mygui-MyGUI3.4.2/MyGUIEngine/inc=
lude/MyGUI_UString.h:213:4:
note: in instantiation of template class 'std::basic_string<unsigned short>'
requested here
    213 |                         dstring::iterator mIter;
        |                         ^
  /usr/include/c++/v1/__fwd/string.h:23:29: note: template is declared here
     23 | struct _LIBCPP_TEMPLATE_VIS char_traits;
        |                             ^

These can be fixed by using `char16_t` instead of `uint16_t` for the
`code_point` type, and `char32_t` instead of `uint32_t` for the
`unicode_char` type.

[1] https://libcxx.llvm.org/ReleaseNotes/19.html#deprecations-and-removals

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