Index: CMakeLists.txt
===================================================================
diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt	(revision 9965)
+++ b/CMakeLists.txt	(working copy)
@@ -138,6 +139,7 @@
 #######################################################################
 # libraries
 find_library(LIB_CAIRO cairo)
+find_library(LIB_dl dl)
 find_library(LIB_fontconfig fontconfig)
 find_library(LIB_freetype freetype)
 find_library(LIB_GL GL)
@@ -146,7 +148,7 @@
 find_library(LIB_png png)
 find_library(LIB_zlib z)
 
-mark_as_advanced(LIB_CAIRO LIB_fontconfig LIB_freetype)
+mark_as_advanced(LIB_CAIRO LIB_dl LIB_fontconfig LIB_freetype)
 mark_as_advanced(LIB_GL LIB_MesaGL)
 mark_as_advanced(LIB_jpeg LIB_png LIB_zlib)
 
Index: src/CMakeLists.txt
===================================================================
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
--- a/src/CMakeLists.txt	(revision 9965)
+++ b/src/CMakeLists.txt	(working copy)
@@ -220,7 +220,7 @@
 endif(MSVC)
 
 if(USE_THREADS)
-   target_link_libraries(fltk ${CMAKE_THREAD_LIBS_INIT})
+   target_link_libraries(fltk ${CMAKE_THREAD_LIBS_INIT} ${LIB_dl})
 endif(USE_THREADS)
 
 if(USE_X11)
@@ -334,7 +334,7 @@
 endif(MSVC)
 
 if(USE_THREADS)
-   target_link_libraries(fltk_SHARED ${CMAKE_THREAD_LIBS_INIT})
+   target_link_libraries(fltk_SHARED ${CMAKE_THREAD_LIBS_INIT} ${LIB_dl})
 endif(USE_THREADS)
 
 if(USE_X11)
@@ -384,11 +384,11 @@
 endif(MSVC)
 
 if(USE_THREADS)
-   target_link_libraries(fltk_SHARED ${CMAKE_THREAD_LIBS_INIT})
+   target_link_libraries(fltk_forms_SHARED ${CMAKE_THREAD_LIBS_INIT} ${LIB_dl})
 endif(USE_THREADS)
 
 if(USE_X11)
-   target_link_libraries(fltk_SHARED ${X11_LIBRARIES})
+   target_link_libraries(fltk_forms_SHARED ${X11_LIBRARIES})
 endif(USE_X11)
 
 #######################################################################
diff -Naur a/CMake/FindDL.cmake b/CMake/FindDL.cmake
--- a/CMake/FindDL.cmake	1969-12-31 19:00:00.000000000 -0500
+++ b/CMake/FindDL.cmake	2014-10-29 23:00:18.000000000 -0400
@@ -0,0 +1,37 @@
+# - Find dl functions
+# This module finds dl libraries.
+#
+# It sets the following variables:
+#  DL_FOUND       - Set to false, or undefined, if dl libraries aren't found.
+#  DL_INCLUDE_DIR - The dl include directory.
+#  DL_LIBRARY     - The dl library to link against.
+
+INCLUDE(CheckFunctionExists)
+
+FIND_PATH(DL_INCLUDE_DIR NAMES dlfcn.h)
+FIND_LIBRARY(DL_LIBRARY NAMES dl)
+
+IF (DL_LIBRARY)
+   SET(DL_FOUND TRUE)
+ELSE (DL_LIBRARY)
+   # if dlopen can be found without linking in dl then,
+   # dlopen is part of libc, so don't need to link extra libs.
+   CHECK_FUNCTION_EXISTS(dlopen DL_FOUND)
+   SET(DL_LIBRARY "")
+ENDIF (DL_LIBRARY)
+
+IF (DL_FOUND)
+
+   # show which dl was found only if not quiet
+   IF (NOT DL_FIND_QUIETLY)
+      MESSAGE(STATUS "Found dl: ${DL_LIBRARY}")
+   ENDIF (NOT DL_FIND_QUIETLY)
+
+ELSE (DL_FOUND)
+
+   # fatal error if dl is required but not found
+   IF (DL_FIND_REQUIRED)
+      MESSAGE(FATAL_ERROR "Could not find dl")
+   ENDIF (DL_FIND_REQUIRED)
+
+ENDIF (DL_FOUND)