meson: Fix freetype and icu dependency lookup

It is wrong to search for a different name depending on the compiler. If
anything, cmake name could be available on systems that uses GCC too.

This also fix regression in the usage of freetype subproject fallback as
its name is "freetype2" and was previously used even when the
"freetype" option was set to "auto".

meson.build

@@ -83,25 +83,39 @@ check_funcs = [
 
 m_dep = cpp.find_library('m', required: false)
 
-# https://github.com/harfbuzz/harfbuzz/pull/2498
-freetype_dep = dependency(cpp.get_argument_syntax() == 'msvc' ? 'freetype' : 'freetype2',
-                          required: get_option('freetype'),
-                          default_options: ['harfbuzz=disabled'])
+
+# Try pkgconfig name
+freetype_dep = dependency('freetype2', required: false)
+if not freetype_dep.found()
+  # Try cmake name
+  freetype_dep = dependency('freetype', required: false)
+endif
+if not freetype_dep.found()
+  # Subproject fallback, `allow_fallback: true` means the fallback will be
+  # tried even if the freetype option is set to `auto`.
+  freetype_dep = dependency('freetype2',
+                            required: get_option('freetype'),
+                            default_options: ['harfbuzz=disabled'],
+                            allow_fallback: true)
+endif
 
 glib_dep = dependency('glib-2.0', required: get_option('glib'))
 gobject_dep = dependency('gobject-2.0', required: get_option('gobject'))
 graphite2_dep = dependency('graphite2', required: get_option('graphite2'))
 graphite_dep = dependency('graphite2', required: get_option('graphite'))
 
-if cpp.get_argument_syntax() == 'msvc'
+# Try pkgconfig name
+icu_dep = dependency('icu-uc', required: false)
+if not icu_dep.found()
+  # Try cmake name
   icu_dep = dependency('ICU',
-                       required: get_option('icu'),
+                       required: false,
                        components: 'uc',
                        method: 'cmake')
-else
-  icu_dep = dependency('icu-uc',
-                       required: get_option('icu'),
-                       method: 'pkg-config')
+endif
+if not icu_dep.found()
+  # Subproject fallback if icu option is enabled
+  icu_dep = dependency('icu-uc', required: get_option('icu'))
 endif
 
 if icu_dep.found() and icu_dep.type_name() == 'pkgconfig'