lablgtk test fix

Closes Homebrew/homebrew#40927.

Signed-off-by: Xu Cheng <xucheng@me.com>

Formula/lablgtk.rb

@@ -33,7 +33,34 @@ class Lablgtk < Formula
         GtkMain.Main.init ()
       let _ = main ()
     EOS
-    system "ocamlc", "-I", "#{Formula["lablgtk"].opt_lib}/ocaml/lablgtk2", "lablgtk.cma", "gtkInit.cmo", "test.ml", "-o", "test"
+    ENV["CAML_LD_LIBRARY_PATH"] = "#{lib}/ocaml/stublibs"
+    flags = %W[
+      -cclib
+      -latk-1.0
+      -cclib
+      -lcairo
+      -cclib
+      -lgdk-quartz-2.0
+      -cclib
+      -lgdk_pixbuf-2.0
+      -cclib
+      -lgio-2.0
+      -cclib
+      -lglib-2.0
+      -cclib
+      -lgobject-2.0
+      -cclib
+      -lgtk-quartz-2.0
+      -cclib
+      -lgtksourceview-2.0
+      -cclib
+      -lintl
+      -cclib
+      -lpango-1.0
+      -cclib
+      -lpangocairo-1.0
+    ]
+    system "ocamlc", "-I", "#{Formula["lablgtk"].opt_lib}/ocaml/lablgtk2", "lablgtk.cma", "gtkInit.cmo", "test.ml", "-o", "test", *flags
     system "./test"
   end
 end