$NetBSD: patch-CMakeLists.txt,v 1.2 2013/11/07 11:59:59 markd Exp $

use mpfr (alternate code doesnt build on BSD)

--- CMakeLists.txt.orig	2013-04-01 23:12:26.000000000 +0000
+++ CMakeLists.txt
@@ -36,6 +36,9 @@ if(NOT GMP_FOUND)
     endif()
 endif(NOT GMP_FOUND)
 
+find_package (MPFR REQUIRED)
+add_definitions (-DKNUMBER_USE_MPFR)
+
 include(CheckTypeSize)
 include(CheckIncludeFiles)