diff -ur wcslib-4.3.1/makedefs.in wcslib-4.3.1.new/makedefs.in
--- wcslib-4.3.1/makedefs.in	2007-12-27 06:57:22.000000000 +0100
+++ wcslib-4.3.1.new/makedefs.in	2009-03-16 15:50:23.000000000 +0100
@@ -107,7 +107,7 @@
 # Shared (dynamic) library (see note 3 above).
   SHRLIB   := @SHRLIB@
   SHRFLAGS := @SHRFLAGS@
-  SHRLD    := @SHRLD@
+  SHRLD    := @SHRLD@ -lm
   SHRLN    := @SHRLN@
 
 # Installation utilities and locations.