diff -Nru allegro-4.4.1.1.orig/CMakeLists.txt allegro-4.4.1.1/CMakeLists.txt
--- allegro-4.4.1.1.orig/CMakeLists.txt	2010-03-03 11:07:40.000000000 +0100
+++ allegro-4.4.1.1/CMakeLists.txt	2013-03-01 13:43:32.735559487 +0100
@@ -218,7 +218,7 @@
 if(CMAKE_COMPILER_IS_GNUCC)
     set(COMPILER_GCC 1)
     set(ALLEGRO_GCC 1)
-    set(WFLAGS "-W -Wall -Wno-unused-parameter")
+    set(WFLAGS "-W -Wall -Wno-unused-parameter -ldl")
     set(WFLAGS_C_ONLY "-Wdeclaration-after-statement")
     if(STRICT_WARN)
         set(WFLAGS "${WFLAGS} -Werror -Wpointer-arith")