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Subject: Re: [Boost-build] Boost Python Build Error
From: Robert (r.firl_at_[hidden])
Date: 2018-10-23 20:08:05


On 2/21/2017 1:18 PM, Rene Rivera via Boost-build wrote:
> There is a bug in building BPL stuff (all of it) that you just ran
> into.. And that I'm trying to fix ATM.
>
> On Tue, Feb 21, 2017 at 11:35 AM, B Ku via Boost-build
> <boost-build_at_[hidden] <mailto:boost-build_at_[hidden]>> wrote:
>
> Hi Guys,
>
> I am trying to get the Boost Python example working.
>
> I am running Windows.  I downloaded the source code for
> boost_1_63_0, ran the boostrap.bat file to generate b2.exe and
> bjam.exe.  Then I executed b2.exe to build libboost*.lib in state/lib.
>
> I then modified and placed the user-config.jam file in the
> %HOMEDRIVE%%HOMEPATH% directory as follows:
>
> # Configure specific msvc version (searched for in standard
> locations and PATH).
> using msvc : 12.0 ;
>
> # Configure specific Python version.
> using python
> : 3.5
> : C:\\Users\\Ben\\AppData\\Local\\Programs\\Python\\Python35\\python.exe
> : C:\\Users\\Ben\\AppData\\Local\\Programs\\Python\\Python35\\include
> : C:\\Users\\Ben\\AppData\\Local\\Programs\\Python\\Python35\\libs
> : <toolset>msvc
> ;

I write my user-config.jam using python line this way:
using python
: 2.7
: C:\\Python27
: C:\\Python27\\include
: C:\\Python27\\libs ;

The "python.exe" is not at the very end of the first path. Perhaps that
is the difference? I do not know the b2 internals well enough to
explain the significance of not including the python executable file.

I also use the three environment variables:

PYTHON_INCLUDE=C:\Python27\include
PYTHON_LIB=C:\Python27\Lib
PYTHON_VERSION=2.7

I am not sure b2 uses them. However, I do recall a python related
compiler/linker problem many months ago, until I added the above three
command prompt environment variables. I discover their use from the
Intel web page that explains how to build Boost with the Intel C++
compiler on Windows, Linux, and OS X:
https://software.intel.com/en-us/articles/building-boost-with-intel-c-compiler-150.
  The Windows section specifically lists adding these. Consequently,
when I build with MSVC, the environment variables are present. I always
obtain the boost_python.lib too.

--Robert

>
> Then, I modified the libs/python/example/tutorial/Jamfile as
> follows, so include .h files can be found:
> project tutorial
>   : requirements
> <include>../../../../
>     <location>.
>     ;
>
> Finally, I copied the bjam.exe to libs/python/example, and executed
> bjam.exe and got the following error:
>
> C:\Users\Ben\Home\boost\boost_1_63_0\libs\python\example>bjam.exe
> ...patience...
> ...found 996 targets...
> ...updating 4 targets...
> msvc.link.dll tutorial\hello_ext.pyd
> LINK : fatal error LNK1181: cannot open input file 'boost_python.lib'
>
>         call
> "C:\Users\Ben\AppData\Local\Temp\b2_msvc_12.0_vcvarsall_x86.cmd" >nul
> link /NOLOGO /INCREMENTAL:NO /DLL /NOENTRY /DEBUG /MACHINE:X86
> /MANIFEST /subsystem:console /out:"tutorial\hello_ext.pyd" /IMPLIB:"tut
>         if %ERRORLEVEL% NEQ 0 EXIT %ERRORLEVEL%
>
> ...failed msvc.link.dll tutorial\hello_ext.pyd
> tutorial\hello_ext.pdb tutorial\hello_ext.pdb...
> ...skipped <ptutorial>hello for lack of <ptutorial>hello_ext.pyd...
> ...failed updating 2 targets...
> ...skipped 2 targets...
>
> Is there a way to specify where the .lib files are supposed to be?
>
> Am I missing a step?  By default, b2 generates lib files with this
> name format: libboost*.lib, not boost_python.lib.
>
> Thank you very much for your help in advance!
>
> Thanks,
> Ben
>
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>
>
>
>
> --
> -- Rene Rivera
> -- Grafik - Don't Assume Anything
> -- Robot Dreams - http://robot-dreams.net <http://robot-dreams.net/>
> -- rrivera/acm.org
> <http://acm.org/> (msn) - grafikrobot/aim,yahoo,skype,efnet,gmail
>
>
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