Dear Boost Developers,

I'd like to compile Boost 1.65.1 with Python 3.5 support on Windows with VS 2015. Python is installed from x64 Anaconda distribution into a so called python virtual environment (along with v3.6 in the default environment).

I created the following user-config.jam in tools/build/src:

using python

: 3.5 # Version

: C:\\ProgramData\\Anaconda3\\envs\\python-35\\python.exe # Interpreter

: C:\\ProgramData\\Anaconda3\\envs\\python-35\\include # include directory

: C:\\ProgramData\\Anaconda3\\envs\\python-35\\libs # link libraries

: <address-model>64 # conditions

;

After executing ./bootstrap.bat (with no options given to it), I call the compiled b2.exe the following way:

b2.exe -j 16 --debug-configuration \

--prefix=<my_boost_lib_dir> -sBOOST_ROOT=<my_boost_dir> \

threading=multi variant=debug,release link=static runtime-link=static \

address-model=64 optimization=speed toolset=msvc \

--with-python <--with-[...]> \

install

My problem is the resulting .lib libraries somehow contain references to python36.lib (and not to python35.lib):

$> dumpbin.exe /directives libboost_python3-vc140-mt-s-1_65_1.lib | findstr python3

/DEFAULTLIB:python36.lib

[...]

b2 outputs the following:

[python-cfg] Configuring python...

[python-cfg] user-specified version: "3.5"

[python-cfg] user-specified cmd-or-prefix: "C:\ProgramData\Anaconda3\envs\python-35\python.exe"

[python-cfg] user-specified includes: "C:\ProgramData\Anaconda3\envs\python-35\include"

[python-cfg] user-specified libraries: "C:\ProgramData\Anaconda3\envs\python-35\libs"

[python-cfg] user-specified condition: "<address-model>64"

[python-cfg] Checking interpreter command "C:\ProgramData\Anaconda3\envs\python-35\python.exe"...

[python-cfg] running command 'DIR /-C /A:S "C:\ProgramData\Anaconda3\envs\python-35\python.exe" 2>&1'

[python-cfg] running command 'C:\ProgramData\Anaconda3\envs\python-35\python.exe -c "from sys import *; print('version=%d.%d\nplatform=%s\nprefix=%s\nexec_prefix=%s\nexecutable=%s' % (version_info[0],version_info[1],platform,prefix,exec_prefix,executable))" 2>&1'

[python-cfg] ...requested configuration matched!

[python-cfg] Details of this Python configuration:

[python-cfg] interpreter command: "C:\ProgramData\Anaconda3\envs\python-35\python.exe"

[python-cfg] include path: "C:\ProgramData\Anaconda3\envs\python-35\include"

[python-cfg] library path: "C:\ProgramData\Anaconda3\envs\python-35\libs"

[python-cfg] DLL search path: "C:\ProgramData\Anaconda3\envs\python-35"

[python-cfg] Checking for NumPy...

[python-cfg] running command 'C:\ProgramData\Anaconda3\envs\python-35\python.exe -c "import sys; sys.stderr = sys.stdout; import numpy; print(numpy.get_include())"'

[python-cfg] NumPy enabled

Do you have any idea how to enable linking to Python 3.5?

Thank you very much!

All the best,

Ákos