When trying to build vim 8.2.2725 with a ports tree freshly checked out with git, I get a linking failure:

link.sh: $LINK_AS_NEEDED set to 'yes': invoking linker directly.
  cc   -fstack-protector-strong  -L/usr/local/lib -Wl,--as-needed  -o vim objects/arabic.o  objects/arglist.o  objects/autocmd.o  objects/beval.o  objects/buffer.o  objects/change.o  objects/blob.o  objects/blowfish.o  objects/cindent.o  objects/clientserver.o  objects/clipboard.o  objects/cmdexpand.o  objects/cmdhist.o  objects/crypt.o  objects/crypt_zip.o  objects/debugger.o  objects/dict.o  objects/diff.o  objects/digraph.o  objects/drawline.o  objects/drawscreen.o  objects/edit.o  objects/eval.o  objects/evalbuffer.o  objects/evalfunc.o  objects/evalvars.o  objects/evalwindow.o  objects/ex_cmds.o  objects/ex_cmds2.o  objects/ex_docmd.o  objects/ex_eval.o  objects/ex_getln.o  objects/fileio.o  objects/filepath.o  objects/findfile.o  objects/fold.o  objects/getchar.o  objects/gui_xim.o  objects/hardcopy.o  objects/hashtab.o  objects/help.o  objects/highlight.o  objects/if_cscope.o  objects/if_xcmdsrv.o  objects/indent.o  objects/insexpand.o  objects/list.o  objects/locale.o  objects/map.o  objects/mark.o  objects/match.o  objects/mbyte.o  objects/memline.o  objects/menu.o  objects/misc1.o  objects/misc2.o  objects/mouse.o  objects/move.o  objects/normal.o  objects/ops.o  objects/option.o  objects/optionstr.o  objects/os_unix.o  objects/pathdef.o  objects/popupmenu.o  objects/popupwin.o  objects/profiler.o  objects/pty.o  objects/quickfix.o
objects/regexp.o  objects/register.o  objects/screen.o  objects/scriptfile.o  objects/search.o  objects/session.o  objects/sha256.o  objects/sign.o  objects/sound.o  objects/spell.o  objects/spellfile.o  objects/spellsuggest.o  objects/syntax.o  objects/tag.o  objects/term.o  objects/terminal.o  objects/testing.o
 objects/textformat.o  objects/textobject.o  objects/textprop.o  objects/time.o  objects/typval.o  objects/ui.o  objects/undo.o  objects/usercmd.o  objects/userfunc.o  objects/version.o  objects/vim9compile.o
objects/vim9execute.o  objects/vim9script.o  objects/vim9type.o  objects/viminfo.o  objects/window.o  objects/bufwrite.o    objects/vterm_encoding.o objects/vterm_keyboard.o objects/vterm_mouse.o objects/vterm_parser.o objects/vterm_pen.o objects/vterm_screen.o objects/vterm_state.o objects/vterm_unicode.o objects/vterm_vterm.o          objects/if_python3.o        objects/netbeans.o  objects/job.o objects/channel.o
objects/xdiffi.o  objects/xemit.o  objects/xprepare.o  objects/xutils.o  objects/xhistogram.o  objects/xpatience.o objects/charset.o  objects/json.o  objects/main.o  objects/memfile.o  objects/message.o
       -lm -lelf  -pthread -lncursesw          -L/usr/local/lib/python3.9/config-3.9 -lpython3.9 -lcrypt
-lintl -ldl -L/usr/local/lib -lintl -lutil -lm -lm
ld: error: undefined symbol: sysinfo
>>> referenced by memline.c
>>>               objects/memline.o:(findswapname)
>>> referenced by memline.c
>>>               objects/memline.o:(ml_recover)
>>> referenced by memline.c
>>>               objects/memline.o:(swapfile_info)
cc: error: linker command failed with exit code 1 (use -v to see invocation)
link.sh: Linking failed
*** Error code 1

Stop.
make[3]: stopped in /usr/ports/editors/vim/work/vim-8.2.2725/src
*** Error code 1

Stop.
make[2]: stopped in /usr/ports/editors/vim/work/vim-8.2.2725
*** Error code 1

Stop.
make[1]: stopped in /usr/ports/editors/vim
*** Error code 1


For now, I've added this to the Makefile.
Not sure if this is the most elegant solution, but works for me.

diff --git a/editors/vim/Makefile b/editors/vim/Makefile
index 6e7e10617..feea79d53 100644
--- a/editors/vim/Makefile
+++ b/editors/vim/Makefile
@@ -18,6 +18,8 @@ USE_GITHUB=   yes

 CONFLICTS_INSTALL?=    vim-console vim-tiny

+LIBS+=         -L${LOCALBASE}/lib -lsysinfo
+
 CONFIGURE_ARGS=        --enable-gui=${GUI} \
                --enable-multibyte \
                --with-tlib=ncursesw

In case it matters, this is my port config:

# make showconfig
===> The following configuration options are available for vim-8.2.2725:
     CSCOPE=off: cscope support
     DEFAULT_VIMRC=off: Install bundled vimrc as default setting
     MAKE_JOBS=off: Enable parallel build
     NLS=off: Native Language Support
     XTERM_SAVE=on: Restore xterm screen after exit
====> Optional language bindings
     LUA=off: Lua scripting language support
     PERL=off: Perl scripting language support
     PYTHON=on: Python bindings or support
     RUBY=off: Ruby bindings or support
     SCHEME=off: MzScheme (Racket) bindings
     TCL=off: Tcl scripting language support
====> Options available for the single CTAGS: you have to select exactly one of them
     CTAGS_BASE=off: Use system ctags
     CTAGS_EXUBERANT=off: Use exctags instead of ctags
     CTAGS_UNIVERSAL=on: Use uctags instead of ctags
====> User interface: you have to select exactly one of them
     ATHENA=off: Athena GUI toolkit
     CONSOLE=on: Console/terminal mode
     GNOME=off: GNOME desktop environment support
     GTK2=off: GTK+ 2 GUI toolkit support
     GTK3=off: GTK+ 3 GUI toolkit support
     MOTIF=off: Motif widget library support
     X11=off: X11 (graphics) support