[Boost-commit] svn:boost r76764 - trunk/boost/math/tools

Subject: [Boost-commit] svn:boost r76764 - trunk/boost/math/tools
From: john_at_[hidden]
Date: 2012-01-28 14:13:45

Author: johnmaddock
Date: 2012-01-28 14:13:44 EST (Sat, 28 Jan 2012)
New Revision: 76764
URL: http://svn.boost.org/trac/boost/changeset/76764

Log:
Don't be too quick to disable long double functions if __NO_LONG_DOUBLE_MATH is set by GLIBC.
Fixes #6459.
Text files modified: 
   trunk/boost/math/tools/config.hpp |     4 +++-                                    
   1 files changed, 3 insertions(+), 1 deletions(-)

Modified: trunk/boost/math/tools/config.hpp
==============================================================================
--- trunk/boost/math/tools/config.hpp	(original)
+++ trunk/boost/math/tools/config.hpp	2012-01-28 14:13:44 EST (Sat, 28 Jan 2012)
@@ -16,6 +16,7 @@
 #include <algorithm>  // for min and max
 #include <boost/config/no_tr1/cmath.hpp>
 #include <climits>
+#include <cfloat>
 #if (defined(macintosh) || defined(__APPLE__) || defined(__APPLE_CC__))
 #  include <math.h>
 #endif
@@ -24,7 +25,8 @@
 #include <boost/math/special_functions/detail/round_fwd.hpp>
 
 #if (defined(__CYGWIN__) || defined(__FreeBSD__) || defined(__NetBSD__) \
-   || (defined(__hppa) && !defined(__OpenBSD__)) || defined(__NO_LONG_DOUBLE_MATH)) && !defined(BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS)
+   || (defined(__hppa) && !defined(__OpenBSD__)) || (defined(__NO_LONG_DOUBLE_MATH) && (DBL_MANT_DIG != LDBL_MANT_DIG))) \
+   && !defined(BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS)
 #  define BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
 #endif
 #if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x582))