[libtorrent] Failing to build 1.1.3 on Win7

Calum Lind

2017-06-03 22:38:31 UTC

A quick update

I tried many combinations to get this to work but still encountered the
same error so wiped the Win7 VM and started again. I installed only VC++
for Python as compiler, needed msvc 9.0 for python 2.7, and everything
built fine!

I'm surmising that having VS 2015 build tools installed messed up boost
python builds. Searching around I found known boost python and VS 2015
issues that would suggest this is the case however it was reported to have
been fixed...

Anyway sorted for my current use-case

Post by Calum Lind
I have created a new Windows 7 VM but I am unable to build the python
bindings.
Using boost 1.63 and MSVC 14.0 (2015)
b2 libtorrent-link=static boost-link=static release optimization=space
encryption=on crypto=openssl include=C:\OpenSSL-Win32\include
linkflags=/LIBPATH:C:\OpenSSL-Win32\lib -j%NUMBER_OF_PROCESSORS% --hash
toolset=msvc
Creating library bin\90aef4b47feb20127cc129bcca93ec9d\libtorrent.lib
and object bin\90aef4b47feb20127cc129bcca93ec9d\libtorrent.exp
alert.obj : error LNK2019: unresolved external symbol "class
libtorrent::alert const volatile * __cdecl boost::get_pointer<class
libtorrent::alert const volatile >(class libtorrent::alert const volatile
@@PDV12@@Z) referenced in function "private:static struct _typeobject *
__cdecl boost::python::objects::make_ptr_instance<class
libtorrent::alert,struct boost::python::objects::pointer_holder<class
boost::shared_ptr<class libtorrent::alert>,class libtorrent::alert>

::get_derived_class_object<class libtorrent::alert>(struct

boost::mpl::bool_<1>,class libtorrent::alert const volatile *)"
@@***@python@boost@@CAPAU_typeobject@@U?$bool_@$***@mpl@***@PDValert
@libtorrent@@@Z)
error_code.obj : error LNK2019: unresolved external symbol "class
boost::system::error_category const volatile * __cdecl
boost::get_pointer<class boost::system::error_category const volatile
__cdecl boost::python::objects::make_ptr_instance<class
boost::system::error_category,struct boost::python::objects::pointer_holder<class
boost::system::error_category *,class boost::system::error_category>

::get_derived_class_object<class boost::system::error_category>(struct

boost::mpl::bool_<1>,class boost::system::error_category const volatile *)"
@?$***@Verror_category@***@boost@@U?$
@***@python@boost@@CAPAU_typeobject@@U?$bool_@$***@mpl@
bin\90aef4b47feb20127cc129bcca93ec9d\libtorrent.pyd : fatal error
LNK1120: 2 unresolved externals
call "C:\Users\IEUser\AppData\Local\Temp\b2_msvc_14.0_
vcvarsall_x86.cmd"

nul

link /NOLOGO /INCREMENTAL:NO /DLL /MACHINE:X86 /MANIFEST
/subsystem:console /out:"bin\90aef4b47feb20127cc129bcca93ec9d\libtorrent.pyd"
/IMPLIB:"bin\90aef4b47feb20127cc129bcca93ec9d\libtorrent.lib"
/LIBPATH:"C:\Python27\libs" /LIBPATH:C:/OpenSSL-Win32/lib /OPT:ICF=5
if %ERRORLEVEL% NEQ 0 EXIT %ERRORLEVEL%
...failed msvc.link.dll bin\90aef4b47feb20127cc129bcca93ec9d\libtorrent.pyd
bin\
90aef4b47feb20127cc129bcca93ec9d\libtorrent.lib...
...removing bin\90aef4b47feb20127cc129bcca93ec9d\libtorrent.lib
...failed updating 2 targets...