Revert "Remove direct link to dwrite from meson scripts"

This reverts commit 6ea6c581ed.

meson.build

@@ -239,12 +239,17 @@ if host_machine.system() == 'windows' and not get_option('gdi').disabled()
 endif
 
 # DirectWrite (Windows)
+directwrite_dep = null_dep
 if host_machine.system() == 'windows' and not get_option('directwrite').disabled()
   if get_option('directwrite').enabled() and not cpp.has_header('dwrite_1.h')
     error('DirectWrite was enabled explicitly, but required header is missing.')
   endif
 
-  conf.set('HAVE_DIRECTWRITE', 1)
+  directwrite_dep = cpp.find_library('dwrite', required: get_option('directwrite'))
+
+  if directwrite_dep.found()
+    conf.set('HAVE_DIRECTWRITE', 1)
+  endif
 endif
 
 # CoreText (macOS)

src/meson.build

@@ -363,6 +363,7 @@ endif
 if conf.get('HAVE_DIRECTWRITE', 0) == 1
   hb_sources += hb_directwrite_sources
   hb_headers += hb_directwrite_headers
+  harfbuzz_deps += directwrite_dep
   # hb-directwrite needs a C++ linker
   libharfbuzz_link_language = 'cpp'
 endif