[boost] [tr1][spirit][hash] Boost trunk +VC9 - autolinking libboost_math

Subject: [boost] [tr1][spirit][hash] Boost trunk +VC9 - autolinking libboost_math
From: Richard Webb (richard.webb_at_[hidden])
Date: 2008-10-05 13:24:23

When test building some code with VC9 + the current Boost trunk i had a link
failure due to a missing libboost_math_c99-vc90-mt-1_37.lib, which i hadnt
built because i'm not using the math lib.

On investigation, this seems to be down to using Spirit/Hash(via
multi_index) when the "boost/tr1/tr1" dir is in the include path. More
specifically, the files:

spirit\home\classic\core\primitives\impl\numerics.ipp
functional\detail\float_functions.hpp

do an include <cmath>, which in this case includes <boost\tr1\cmath.hpp>,
which then includes <boost/math/tr1.hpp>, autolinking and all.

I can work around the problem by building the math lib or turning off auto
linking for it but it seems wrong that i have to do that. 
Is there a better official solution for this, such as using
<config/no_tr1/cmath.hpp> instead of <cmath> ?

Thanks,
Richard Webb
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