$OpenBSD: patch-boost_math_tools_config_hpp,v 1.2 2011/11/02 11:54:15 jasper Exp $
--- boost/math/tools/config.hpp.orig	Mon Oct 12 06:35:20 2009
+++ boost/math/tools/config.hpp	Mon Oct 17 01:15:58 2011
@@ -24,7 +24,7 @@
 #include <boost/math/special_functions/detail/round_fwd.hpp>
 
 #if defined(__CYGWIN__) || defined(__FreeBSD__) || defined(__NetBSD__) \
-   || defined(__hppa) || defined(__NO_LONG_DOUBLE_MATH)
+   || (defined(__hppa) && !defined(__OpenBSD__)) || defined(__NO_LONG_DOUBLE_MATH)
 #  define BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
 #endif
 #if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x582))