Re: [Boost-build] Building boost with Python 3.5 links to 3.6

Subject: Re: [Boost-build] Building boost with Python 3.5 links to 3.6
From: Robert (r.firl_at_[hidden])
Date: 2017-09-25 20:04:25

On 9/22/2017 6:58 AM, Szőts Ákos via Boost-build wrote:
> 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:
> 
>  Â using python
>  Â  Â  Â  : 3.5 Â # 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
>  Â  Â  Â  : <address-model>64 Â # conditions
>  Â  Â  Â  ;

I am not sure you can separate the sections on a line by line basis. 
Someone who knows b2 much better than I can confirm.  Regardless, I use 
Python 2.7 via user-config.jam.  The line is:

using python : 2.7 : C:\\Python27 : C:\\Python27\\include : 
C:\\Python27\\libs ;

I then have the output files between Boost, Python and the compiler 
named similarly to:

boost_python-vc141-mt-1_65_1.lib

--Robert

> 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  \
>  Â  Â  Â  --prefix=<my_boost_lib_dir> -sBOOST_ROOT=<my_boost_dir> \
>  Â  Â  Â  threading=multi variant=debug,release link=static 
> runtime-link=static \
>  Â  Â  Â  address-model=64 optimization=speed toolset=msvc \
>        --with-python  <--with-[...]> \
>  Â  Â  Â  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
>  Â  Â /DEFAULTLIB:python36.lib
>  Â  Â /DEFAULTLIB:python36.lib
>  Â  Â /DEFAULTLIB:python36.lib
>  Â  Â /DEFAULTLIB:python36.lib
>  Â  Â /DEFAULTLIB:python36.lib
>  Â  Â [...]
> 
> b2 outputs the following:
> [python-cfg] Configuring python...
> [python-cfg] Â  user-specified version: "3.5"
> [python-cfg] Â  user-specified cmd-or-prefix: 
> "C:\ProgramData\Anaconda3\envs\python-35\python.exe"
> [python-cfg] Â  user-specified includes: 
> "C:\ProgramData\Anaconda3\envs\python-35\include"
> [python-cfg] Â  user-specified libraries: 
> "C:\ProgramData\Anaconda3\envs\python-35\libs"
> [python-cfg] Â  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] Â  interpreter command: 
> "C:\ProgramData\Anaconda3\envs\python-35\python.exe"
> [python-cfg] Â  include path: 
> "C:\ProgramData\Anaconda3\envs\python-35\include"
> [python-cfg] Â  library path: "C:\ProgramData\Anaconda3\envs\python-35\libs"
> [python-cfg] Â  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
> 
> 
> 
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