Convert fallback kwargs to [provide] entries.

meson.build

@@ -90,15 +90,12 @@ if not get_option('freetype').disabled()
   if not freetype_dep.found()
     # https://github.com/harfbuzz/harfbuzz/pull/2498
     freetype_dep = dependency('freetype2', required: get_option('freetype'),
-                              fallback: ['freetype2', 'freetype_dep'],
                               default_options: ['harfbuzz=disabled'])
   endif
 endif
 
-glib_dep = dependency('glib-2.0', required: get_option('glib'),
-                      fallback: ['glib', 'libglib_dep'])
-gobject_dep = dependency('gobject-2.0', required: get_option('gobject'),
-                         fallback: ['glib', 'libgobject_dep'])
+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'))
 
@@ -148,8 +145,8 @@ if not get_option('cairo').disabled()
     # dependency cycle here because we have configured freetype2 above with
     # harfbuzz support disabled, so when cairo will lookup freetype2 dependency
     # it will be forced to use that one.
-    cairo_dep = dependency('cairo', fallback: 'cairo', required: get_option('cairo'))
-    cairo_ft_dep = dependency('cairo-ft', fallback: 'cairo', required: get_option('cairo'))
+    cairo_dep = dependency('cairo', required: get_option('cairo'))
+    cairo_ft_dep = dependency('cairo-ft', required: get_option('cairo'))
   endif
 endif
 

subprojects/cairo.wrap

@@ -3,3 +3,6 @@ directory=cairo
 url=https://gitlab.freedesktop.org/cairo/cairo.git
 depth=1
 revision=1.17.4
+
+[provide]
+dependency_names = cairo, cairo-ft

subprojects/freetype2.wrap

@@ -2,3 +2,6 @@
 directory=freetype
 url=https://gitlab.freedesktop.org/freetype/freetype.git
 revision=VER-2-11-0
+
+[provide]
+freetype2 = freetype_dep

subprojects/glib.wrap

@@ -4,3 +4,7 @@ url=https://gitlab.gnome.org/GNOME/glib.git
 depth=1
 push-url=git@gitlab.gnome.org:GNOME/glib.git
 revision=2.58.1
+
+[provide]
+glib-2.0 = libglib_dep
+gobject-2.0 = libgobject_dep