Boost C++ Libraries: Ticket #11505: operators: -Wundef warning issued for __NVCC__ construct https://svn.boost.org/trac10/ticket/11505 <p> -Wundef warning is issued for <span class="underline">NVCC</span> construct. </p> <p> Removing this line fixed it for me: </p> <p> "BOOST_WORKAROUND(<span class="underline">NVCC</span>, BOOST_TESTED_AT(1)) \" </p> en-us Boost C++ Libraries /htdocs/site/boost.png https://svn.boost.org/trac10/ticket/11505 Trac 1.4.3