On Fri, Jul 7, 2017 at 3:46 AM, P F via Boost
You should just need to define CMAKE_PREFIX_PATH as that is the variable you use in cmake to tell it where dependencies are(even on windows). Using BOOST_ROOT is more for refining how boost is found when multiple version exists in the CMAKE_PREFIX_PATH. So if you install all your dependencies(ie boost, openssl, zlib, etc) in some directory say C:\deps32 and C:\deps64 then all you need to do is set the CMAKE_PREFIX_PATH for each version:
alias cmake32=‘cmake -G \'Visual Studio 14 2015\' -DCMAKE_PREFIX_PATH=C:\deps32 -DCMAKE_INSTALL_PREFIX=C:\deps32’ alias cmake64=‘cmake -G \'Visual Studio 14 2015 Win64\' -DCMAKE_PREFIX_PATH=C:\deps64 -DCMAKE_INSTALL_PREFIX=C:\deps64’
Then cmake32/cmake64 sets up cmake with the different address models, and there is no need to worry about setting custom variables such as BOOST_ROOT. You just create separate build trees for each variant instead.
I'd like to build all variants in one go.. having to cd to each build tree manually is cumbersome. -- Olaf