git: 4d7c78c3d2e4 - main - multimedia/mkvtoolnix: fix build with libc++ 21

The branch main has been updated by dim:

URL: https://cgit.FreeBSD.org/ports/commit/?id=4d7c78c3d2e4d40c851da6e6161d29d6a62d3b31

commit 4d7c78c3d2e4d40c851da6e6161d29d6a62d3b31
Author:     Dimitry Andric <dim@FreeBSD.org>
AuthorDate: 2026-02-14 21:55:01 +0000
Commit:     Dimitry Andric <dim@FreeBSD.org>
CommitDate: 2026-02-15 21:59:17 +0000

    multimedia/mkvtoolnix: fix build with libc++ 21
    
    With libc++ 21 multimedia/mkvtoolnix fails to build, with errors similar
    to:
    
        In file included from lib/fmt/src/os.cc:13:
        In file included from lib/fmt/include/fmt/os.h:11:
        lib/fmt/include/fmt/format.h:745:28: fatal error: use of undeclared identifier 'malloc'
          745 |     T* p = static_cast<T*>(malloc(n * sizeof(T)));
              |                            ^~~~~~
    
    This is because malloc and free are defined in <cstdlib>, and os.h does
    not explicitly include it. (Before libc++ 21, the fmt library was
    "lucky" that <cstdlib> was included transitively, but this is no longer
    the case.)
    
    PR:             293182
    Approved by:    riggs (maintainer)
    MFH:            2026Q1
---
 multimedia/mkvtoolnix/files/patch-lib_fmt_include_fmt_format.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/multimedia/mkvtoolnix/files/patch-lib_fmt_include_fmt_format.h b/multimedia/mkvtoolnix/files/patch-lib_fmt_include_fmt_format.h
new file mode 100644
index 000000000000..a8ecd4b0096d
--- /dev/null
+++ b/multimedia/mkvtoolnix/files/patch-lib_fmt_include_fmt_format.h
@@ -0,0 +1,10 @@
+--- lib/fmt/include/fmt/format.h.orig	2026-01-02 12:35:10 UTC
++++ lib/fmt/include/fmt/format.h
+@@ -44,6 +44,7 @@
+ #  include <cmath>    // std::signbit
+ #  include <cstddef>  // std::byte
+ #  include <cstdint>  // uint32_t
++#  include <cstdlib>  // malloc/free
+ #  include <cstring>  // std::memcpy
+ #  include <limits>   // std::numeric_limits
+ #  include <new>      // std::bad_alloc