diff -ur esorex-3.9.6/configure esorex-3.9.6.new/configure
--- esorex-3.9.6/configure	2012-05-09 09:29:38.000000000 +0200
+++ esorex-3.9.6.new/configure	2013-03-27 08:27:36.202745459 +0100
@@ -13295,7 +13295,7 @@
 $as_echo_n "checking for CPL... " >&6; }
 
     cpl_check_cpl_header="cpl.h"
-    cpl_check_cpl_lib="libcplcore.a"
+    cpl_check_cpl_lib="libcplcore.so"
 
     cpl_incdirs=""
     cpl_libdirs=""
@@ -13459,7 +13459,7 @@
 $as_echo_n "checking for libcext... " >&6; }
 
     cpl_cext_check_header="cxtypes.h"
-    cpl_cext_check_lib="libcext.a"
+    cpl_cext_check_lib="libcext.so"
 
     cpl_cext_incdirs=""
     cpl_cext_libdirs=""