Re: Boost Python Build Error

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 
> <[email protected] <mailto:[email protected]>> 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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