-----Original Message----- From: boost-bounces@lists.boost.org [mailto:boost-bounces@lists.boost.org] On Behalf Of David M. Cotter Sent: Saturday, October 03, 2009 11:34 PM To: boost@lists.boost.org Subject: Re: [boost] threads: linking on OSX
bjam ... architecture=combined
okay now i get this:
darwin.compile.c++ bin.v2/libs/math/config/darwin-4.2.1/release/ architecture-combined/link-static/threading-multi/ has_long_double_support.o /Users/davec/Developer/depot/kJams/External/boost_1_40_0/libs/math/ config/has_long_double_support.cpp:9:2: error: #error "long double support is not supported by Boost.Math on this Plaform: the long double version of the TR1 library will not be built." lipo: can't figure out the architecture type of: /var/folders/h7/ h7zL6S-RECGa80fEMYXIpk+++TI/-Tmp-//cc9IHJPJ.out
is that a bad thing?
the config file contains #ifdef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS #error "long double support is not supported by Boost.Math on this Plaform: the long double version of the TR1 library will not be built." #endif So the error message means BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS must be defined, so that you won't get long double support. I suspect this is because you are using Darwin. I:\boost-sandbox\math_toolkit\boost\math\tools\config.hpp In it John Maddock notes: // Darwin's rather strange "double double" is rather hard to // support, it should be possible given enough effort though... I believe that the upshot is all is well using double and float, but not long double. If you don't want long double, no problem. If you really need more accuracy, you could use NTL (for which support is provided - see the docs). HTH Paul PS John Maddock may well give a more authoritative reply in due course.