Re: Development of the relax-disp branch. -- May 12, 2013 - 20:42

Hi Edward.

I have a the file

python27.lib

in C:\Python27\libs.

I still don't have a clue whats wrong.

Could it be something with Visual C++ 2005 Express Edition?

I am not sure the installation went correct, since when I do

Windows Start button->Microsoft Windows SDK v7.1->Visual Studio Registration->Windows SDK Configuration Tool

Change "Installed Windows SDK Versions:" from v7.1 to 8.0

I get an error: 

"Your system does not have Visual Studio 2005 or  Visual Studio 2008 installed"

Best

Troels Emtekær Linnet

2013/5/11 Edward d'Auvergne <edward@xxxxxxxxxxxxx>

Hi,

We should be able to get to the bottom of the problem and make this
run.  But setting up the development platform on MS Windows of the
MSVS compiler and Python is always painful.  Because of this I set up
a virtual machine image of Windows 2000 with MSVS 2005 many years ago
and have been using this to build the Windows pre-compiled relax
distributions (http://www.nmr-relax.com/download.html#MS_Windows) ever
since.  I have updated Python to version 2.7 on this vm, but the
compiler setup works and I don't want to have to set up another
environment.

>From the error messages, it is clear that this 2012 version of the
Microsoft compiler catches more problems in the code.  The warning:

c:\python27\github\relax_disp\target_functions\relax_fit.c(137) :
warning C4700: uninitialized local variable 'params' used

may be an issue.  I think this is harmless, but you could try to
comment out line 137 of that file (the call to the exponential()
function) and see if that makes a difference.  This is inside the
dfunc() function which is both non-functional and not used.  This is
supposed to return the gradient of the exponential curve but is not
implemented yet as simplex optimisation, which does not require the
gradient or Hessian, was sufficient for finding the solution for this
2 parameter problem.

>From these new messages, it is clear that the Python.h file is being
found.  The include /I"C:\Python27\Scripts\..\include" is interesting
as this implies that sys.prefix as seen by scons is set to
"C:\Python27\Scripts\..".  Although strange, this may not be an issue.
 But when you run Python, you see sys.prefix as "C:\Python27".
Hmmmm.....

Maybe the problem is not that Python.h cannot be found, but that the
python32.lib file cannot be found.  Can you see this file in your
C:\Python27\libs\ directory?  You can see that this is used in the
linking command:

link /nologo /dll /out:target_functions\relax_fit.pyd

/implib:target_functions\relax_fit.lib /LIBPATH:C:\Python27\libs

target_functions\c_chi2.obj target_functions\exponential.obj
target_functions\relax_fit.obj

On Windows, there should be a python32.lib file in the LIBPATH.

Regards,

Edward

On 11 May 2013 12:41, Troels Emtekær Linnet <tlinnet@xxxxxxxxx> wrote:
> Hi Edward.
>
> Sigh.
>
> I have looked around for
> "error LNK2019: unresolved external symbol"
> and it seems that many experience the problem.
>
> But there don't seem to be an universal explanation/bug fix.
> And if I find a thing I would like to try, I really don't know where to
> start. ? :-)
>
> - "In Visual-Studio most linkage problems are related to forget adding .cpp
> files."
> - Url 2,  Url3, Url4, Url5, Url6
>
> In the last Url, there is this solution:
> ---
> in the Project properties, set the Platform Toolset to VS2008 (v90) and the
> correct directories depending on your installation (ie : include =>
> C:\Program Files (x86)\Windows Kits\8.0\Include\shared;C:\Program Files
> (x86)\Windows Kits\8.0\Include\um;$(IncludePath) and Libraries => C:\Program
> Files (x86)\Windows Kits\8.0\Lib\win8\um\x64;$(LibraryPath)). Don't forget
> to set the .lib in Link entries.
> ---
>
> After installation of Visual Studio 2012, I do have the folder:
> C:\Program Files (x86)\Windows Kits\8.0
>
> I have  attached a text file, how I have installed until now.
>
> I hope we can break this "annoying behaviour?"
> Where should I look, if .ccp files is added ??
>
> Best
> Troels
> ------------------------
>
> C:\Python27\github\relax_disp>scons clean_all
> scons: Reading SConscript files ...
> scons: done reading SConscript files.
> scons: Building targets ...
> clean_manual_files(["manual_clean"], [])
>
> ##########################################
> # Cleaning up the temporary manual files #
> ##########################################
>
>
>
>
>
>
> clean_files(["clean"], [])
>
> ###############################
> # Cleaning up temporary files #
> ###############################
>
>
>
> Removing the files ending in ['pyc', 'pyo', 'bak', 'o', 'os', 'obj', 'exp',
> 'lib
> '].
>
> Removing temporary relax save state files (of the form
> relax_state_xxxxxxxx_xxxx
> xx.bz2).
>
> Removing the Python 3 __pycache__ directories.
>
>
>
>
>
> clean_all_files(["clean_all"], [])
>
> #########################
> # Cleaning up all files #
> #########################
>
>
>
> Removing the files ending in ['so', 'sconsign', 'dll', 'pyd'].
>
>
>
>
>
> scons: done building targets.
>
> C:\Python27\github\relax_disp>scons
> scons: Reading SConscript files ...
> scons: done reading SConscript files.
> scons: Building targets ...
>
>
>
>
> ###########################
> # Compiling the C modules #
> ###########################
>
>
> Building the relaxation curve fitting module
> 'target_functions\\relax_fit.pyd'
>
> cl /Fotarget_functions\c_chi2.obj /c target_functions\c_chi2.c /nologo
> /I"C:\Pyt
> hon27\Scripts\..\include"
> c_chi2.c
> cl /Fotarget_functions\exponential.obj /c target_functions\exponential.c
> /nologo
>  /I"C:\Python27\Scripts\..\include"
> exponential.c
> cl /Fotarget_functions\relax_fit.obj /c target_functions\relax_fit.c /nologo
> /I"
> C:\Python27\Scripts\..\include"
> relax_fit.c
> c:\python27\github\relax_disp\target_functions\relax_fit.c(137) : warning
> C4700:
>  uninitialized local variable 'params' used
> link /nologo /dll /out:target_functions\relax_fit.pyd
> /implib:target_functions\r
> elax_fit.lib /LIBPATH:C:\Python27\libs target_functions\c_chi2.obj
> target_functi
> ons\exponential.obj target_functions\relax_fit.obj
>    Creating library target_functions\relax_fit.lib and object
> target_functions\r
> elax_fit.exp
> relax_fit.obj : error LNK2019: unresolved external symbol
> __imp__PyFloat_FromDou
> ble referenced in function _func
> relax_fit.obj : error LNK2019: unresolved external symbol
> __imp__PyFloat_AsDoubl
> e referenced in function _setup
> relax_fit.obj : error LNK2019: unresolved external symbol __imp__PyList_New
> refe
> renced in function _back_calc_I
> relax_fit.obj : error LNK2019: unresolved external symbol
> __imp__PyList_SetItem
> referenced in function _back_calc_I
> relax_fit.obj : error LNK2019: unresolved external symbol
> __imp__PyArg_ParseTupl
> e referenced in function _func
> relax_fit.obj : error LNK2019: unresolved external symbol
> __imp__PyArg_ParseTupl
> eAndKeywords referenced in function _setup
> relax_fit.obj : error LNK2019: unresolved external symbol
> __imp__Py_InitModule4
> referenced in function _initrelax_fit
> relax_fit.obj : error LNK2019: unresolved external symbol
> __imp__PySequence_GetI
> tem referenced in function _setup
> relax_fit.obj : error LNK2019: unresolved external symbol
> __imp___Py_NoneStruct
> referenced in function _setup
> target_functions\relax_fit.pyd : fatal error LNK1120: 9 unresolved externals
> scons: *** [target_functions\relax_fit.pyd] Error 1120
> scons: building terminated because of errors.
>
> C:\Python27\github\relax_disp>python
> Enthought Python Distribution -- www.enthought.com
> Version: 7.3-2 (64-bit)
>
> Python 2.7.3 |EPD 7.3-2 (64-bit)| (default, Apr 12 2012, 15:20:16) [MSC
> v.1500 6
> 4 bit (AMD64)] on win32
> Type "credits", "demo" or "enthought" for more information.
>>>> import sys
>>>> from os import path
>>>> print sys.prefix + path.sep + 'include'
> C:\Python27\include
>>>>
> C:\Python27\github\relax_disp>dir C:\Python27\include\Python*
>  Directory of C:\Python27\include
>
> 15-04-2013  00:37            21.113 Python-ast.h
> 15-04-2013  00:37             4.329 Python.h
> 15-04-2013  00:37             7.339 pythonrun.h
>                3 File(s)         32.781 bytes
>                0 Dir(s)  60.963.274.752 bytes free
>
> C:\Python27\github\relax_disp>