[CMake] Can't find Boost with Visual Studio 2017

[David Demelier]

Hello all,

I've built Booost 1.66 on Windows with Visual Studio 2017 using the 
following invocation:

     .\b2
         link=shared
         runtime-link=shared
         threading=multi
         toolset=msvc
         variant=debug
         address-model=64
         install --prefix=C:/env/vs/amd64d

Then, the C:/env/vs/amd64d tree is filled like this:

   - lib/boost_timer-vc141-mt-gd-x64-1_66.lib (and so on)
   - include/boost-1_66/boost/{asio/assign,...}

I create a sample CMake project:

     cmake_minimum_required(VERSION 3.5)
     project(foo)
     find_package(Boost REQUIRED COMPONENTS timer)

I set CMAKE_PREFIX_PATH and run CMake

     set CMAKE_PREFIX_PATH=C:/env/vs/amd64d/
     cmake . -G "Visual Studio 15 2017 Win64"

     [...]
-- Detecting CXX compile features - done
CMake Warning at C:/Program 
Files/CMake/share/cmake-3.10/Modules/FindBoost.cmake:567 (message):
   Imported targets and dependency information not available for Boost 
version
   (all versions older than 1.33)
Call Stack (most recent call first):
   C:/Program Files/CMake/share/cmake-3.10/Modules/FindBoost.cmake:907 
(_Boost_COMPONENT_DEPENDENCIES)
   C:/Program Files/CMake/share/cmake-3.10/Modules/FindBoost.cmake:1542 
(_Boost_MISSING_DEPENDENCIES)
   CMakeLists.txt:3 (find_package)


CMake Error at C:/Program 
Files/CMake/share/cmake-3.10/Modules/FindBoost.cmake:1928 (message):
   Unable to find the requested Boost libraries.

   Unable to find the Boost header files.  Please set BOOST_ROOT to the 
root
   directory containing Boost or BOOST_INCLUDEDIR to the directory 
containing
   Boost's headers.
Call Stack (most recent call first):
   CMakeLists.txt:3 (find_package)


-- Configuring incomplete, errors occurred!
See also "C:/Users/markand/Documents/test/CMakeFiles/CMakeOutput.log".

I can't understand what I am missing because it's not the first time I 
use boost on Windows though. I've tried set BOOST_ROOT to the same value 
as CMAKE_PREFIX_PATH with no results.

-- 
David Demelier