--- configure.in	24 May 2008 08:28:58 -0000	1.131
+++ configure.in	10 Jun 2008 14:35:27 -0000
@@ -375,7 +375,12 @@
 dnl free fast math library
 AC_CHECK_LIB(ffm, cos, USE_LIBM="-lffm -lm")
 dnl Compaq fast math library.
-AC_CHECK_LIB(cpml, cos, USE_LIBM="-lcpml")
+AC_ARG_ENABLE(cpml,
+  [  --enable-cpml              Use Compaq's Alpha Optimized Math Library],
+  [if test "$enableval" = yes; then
+    AC_CHECK_LIB(cpml, cos, USE_LIBM="-lcpml")
+   fi
+])
 CONFIG_MATH_LIB="${USE_LIBM}"
 
 dnl configure use of features