git: 1c818faba725 - main - science/dlib-cpp: fix build with libc++ 19

The branch main has been updated by dim:

URL: https://cgit.FreeBSD.org/ports/commit/?id=1c818faba7259c7176aa3f6717451a274bff7fc2

commit 1c818faba7259c7176aa3f6717451a274bff7fc2
Author:     Dimitry Andric <dim@FreeBSD.org>
AuthorDate: 2024-11-10 11:49:55 +0000
Commit:     Dimitry Andric <dim@FreeBSD.org>
CommitDate: 2024-11-10 12:08:40 +0000

    science/dlib-cpp: fix build with libc++ 19
    
    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 science/dlib-cpp to fail to compile with clang 19 and libc++
    19, resulting in errors similar to:
    
      /usr/include/c++/v1/string:820:42: error: implicit instantiation of undefined template 'std::char_traits<unsigned int>'
        820 |   static_assert(is_same<_CharT, typename traits_type::char_type>::value,
            |                                          ^
      /wrkdirs/usr/ports/science/dlib-cpp/work/dlib-19.24.6/dlib/bigint/../unicode/unicode.h:718:19: note: in instantiation of template class 'std::basic_string<unsigned int>' requested here
        718 |     const ustring convert_to_utf32 (
            |                   ^
      /usr/include/c++/v1/__fwd/string.h:23:29: note: template is declared here
         23 | struct _LIBCPP_TEMPLATE_VIS char_traits;
            |                             ^
    
    This can be fixed by defining `unichar` as `char32_t` instead of
    `uint32` in `unicode.h`, and adding a serializer for `char32_t` to
    `serialize.h`.
    
    [1] https://libcxx.llvm.org/ReleaseNotes/19.html#deprecations-and-removals
    
    PR:             282665
    Approved by:    arrowd (maintainer)
    MFH:            2024Q4
---
 science/dlib-cpp/files/patch-dlib_serialize.h       | 11 +++++++++++
 science/dlib-cpp/files/patch-dlib_unicode_unicode.h | 11 +++++++++++
 2 files changed, 22 insertions(+)

diff --git a/science/dlib-cpp/files/patch-dlib_serialize.h b/science/dlib-cpp/files/patch-dlib_serialize.h
new file mode 100644
index 000000000000..94306df64159
--- /dev/null
+++ b/science/dlib-cpp/files/patch-dlib_serialize.h
@@ -0,0 +1,11 @@
+--- dlib/serialize.h.orig	2024-02-17 21:44:22 UTC
++++ dlib/serialize.h
+@@ -639,6 +639,8 @@ namespace dlib
+     USE_DEFAULT_INT_SERIALIZATION_FOR(wchar_t)
+ #endif
+ 
++    USE_DEFAULT_INT_SERIALIZATION_FOR(char32_t)
++
+ // ----------------------------------------------------------------------------------------
+ 
+     inline void serialize(
diff --git a/science/dlib-cpp/files/patch-dlib_unicode_unicode.h b/science/dlib-cpp/files/patch-dlib_unicode_unicode.h
new file mode 100644
index 000000000000..4527fdc054b0
--- /dev/null
+++ b/science/dlib-cpp/files/patch-dlib_unicode_unicode.h
@@ -0,0 +1,11 @@
+--- dlib/unicode/unicode.h.orig	2024-02-17 21:44:22 UTC
++++ dlib/unicode/unicode.h
+@@ -16,7 +16,7 @@ namespace dlib
+ 
+ // ----------------------------------------------------------------------------------------
+ 
+-    using unichar = uint32;
++    using unichar = char32_t;
+     using ustring = std::basic_string<unichar>;
+ 
+ // ----------------------------------------------------------------------------------------