Get Overlay code to compile.

Author: gputnam

icaruscode/Overlays/CMakeLists.txt

@@ -1,8 +1,8 @@
 find_package(gallery         REQUIRED)
 
-#find_package(larwirecell REQUIRED )
-#find_package(jsoncpp REQUIRED)
-#find_package(spdlog REQUIRED)
+find_package(larwirecell REQUIRED )
+find_package(jsoncpp REQUIRED)
+find_package(spdlog REQUIRED)
 
 include_directories( $ENV{JSONCPP_INC} )
 link_directories( $ENV{JSONCPP_LIB} )
@@ -44,6 +44,7 @@ art_make_library(
 	WireCellPgraph
 	WireCellRoot
 	jsoncpp
+	dl
 )