diff -ur esorex-3.9.0/configure esorex-3.9.0.new/configure
--- esorex-3.9.0/configure	2011-01-11 09:56:58.000000000 +0100
+++ esorex-3.9.0.new/configure	2011-04-19 23:09:07.698275082 +0200
@@ -12414,7 +12414,7 @@
 $as_echo_n "checking for CPL... " >&6; }
 
     cpl_check_cpl_header="cpl_macros.h"
-    cpl_check_cpl_lib="libcplcore.la"
+    cpl_check_cpl_lib="libcplcore.so"
 
     cpl_includes=""
     cpl_libraries=""