[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Zachary Ware]

Zachary Ware added the comment:

Considering the consensus somewhere in the middle of this discussion that this 
is not a Python bug, the unavailability of VS2008 Express, and the availability 
of the Visual C++ Compiler for Python 2.7 package, I'm closing this as 'wont 
fix'.  If anyone just absolutely can't be satisfied by Visual C++ Compiler for 
Python 2.7, you can reopen.

--
resolution:  -> wont fix
stage: patch review -> resolved
status: open -> closed
versions:  -Python 3.4, Python 3.5

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Zachary Ware]

Zachary Ware added the comment:

Paul Moore added the comment:
>
> Note that in spite of the name, the process should also work for Python
> 3.2 and 3.3, which also use VS2008 (but I haven't tested that explicitly).
>

Just 3.2; 3.3 was the first version to use VS2010.

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Paul Moore]

Paul Moore added the comment:

The correct solution to this issue now is to install the Microsoft supplied 
"Visual C++ Compiler for Python 2.7" package (available as a free download from 
MSDN). That has all the components needed to build 32 and 64-bit extensions. 
Your setup.py needs to use setuptools (as there is a setuptools extension to 
recognise this compiler package) but otherwise the process should be seamless.

Note that in spite of the name, the process should also work for Python 3.2 and 
3.3, which also use VS2008 (but I haven't tested that explicitly).

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Florian Bruhin]

Changes by Florian Bruhin :


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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Jurko Gospodnetić]

Changes by Jurko Gospodnetić :


Removed file: http://bugs.python.org/file36823/218ef482e1e4.diff

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Jurko Gospodnetić]

Changes by Jurko Gospodnetić :


Added file: http://bugs.python.org/file36823/218ef482e1e4.diff

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Jurko Gospodnetić]

Jurko Gospodnetić added the comment:

Here's another patch fixing the Visual Studio Express edition issue
plus some minor related code-cleanup.

See the Hg repo at:
  https://bitbucket.org/jurko/cpython
branch:
  jurko/distutils_msvc_express_fix

direct link:
  
https://bitbucket.org/jurko/cpython/commits/branch/jurko/distutils_msvc_express_fix

Basically - native 64-bit compiler is not available with Visual Studio
Express edition, but its 32-bit to 64-bit cross-compiler is, so the fix just 
attempts to configure the cross-compiler if configuring the native compiler 
fails to set all the necessary environment variables.

Tested to work correctly with Visual Studio Express edition installed, and no 
additional Platform SDK.

I'm also directly attaching a bundle containing the same commits.

I've split up the changes into cleanly separated commits so they should be real 
easy to review & verify, and there should be no risk of breakage in use cases 
not explicitly attacked by the proposed changes.

Hope this helps.

Best regards,
  Jurko Gospodnetić

--
hgrepos: +274
nosy: +Jurko.Gospodnetić
Added file: 
http://bugs.python.org/file36822/CPython_msvc_express_fix_based_on_ec3077e23b7d1353af65a987d4caaef4343bdb41.hg

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Paul Moore]

Paul Moore added the comment:

>From the comments here, there seems to be a belief that this is somehow 
>related to VC Express only.

I have hit this error when using the MS SDK (both 7.0 on Python 2.7, and 7.1 on 
Python 3.3 and 3.4) with DISTUTILS_USE_SDK set.

Unless I have somehow misconfigured my installation, this bug prevents me from 
having any means of building Python extensions using free tools for 64-bit 
Windows. It is possible I have misconfigured something, as I am working from 
various notes on the web, plus trial and error, because there is no official 
documentation I have found on how to set up the SDK for use with distutils in 
this manner.

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Steve Dower]

Steve Dower added the comment:

There is other work going on that will make the patches unnecessary. One 
problem is that vcvarsall.bat isn't where msvc9compiler.py is looking, which 
can be fixed with monkey patching in setup.py or in setuptools. The other 
problem is that VC9 is hard to get hold of these days. I'm working on both 
problems and dealing with the big-company-inertia problem.

For 3.5 I'll update msvc9compiler.py as part of my VC14 support. 3.4 (and 3.5 
in the meantime) don't need to be updated as the easiest way to get VC10 is 
still as part of VS 2010. However, when the VS 2010 download is removed then 
things will become more difficult.

In general, I think we're better off helping package developers make 
builds/wheels than we are helping users to get the compiler. Windows just 
doesn't have enough platform incompatibilities to make it worthwhile.

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Mark Lawrence]

Mark Lawrence added the comment:

I'm assuming that the 2.7 patch is still valid but have no idea whether or not 
any work is needed on 3.4 or 3.5.

--
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versions: +Python 3.5 -Python 3.2, Python 3.3

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Brian Curtin]

Changes by Brian Curtin :


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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Boris Dayma]

Changes by Boris Dayma :


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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Stefan Krah]

Changes by Stefan Krah :


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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Antoine Pitrou]

Changes by Antoine Pitrou :


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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Mike Mazurek]

Mike Mazurek added the comment:

In building pycrypto for python 3.4 I applied patch msvccompiler9_33.diff. 
After applying the patch there is an unassigned variable: KEY_BASE on line 67 
of the patched file. 
After setting
KEY_BASE = "Software\\Wow6432Node\\Microsoft\\"
before its first use I was able to successfully build pycrypto.

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Ned Deily]

Changes by Ned Deily :


--
Removed message: http://bugs.python.org/msg212255

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[anuj0990]

anuj0990 added the comment:

This is very useful information shared here. I am really thankful for this. http://www.99th.co.in >99th.co.in

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Justin Foo]

Justin Foo added the comment:

I think getting this bug fixed would be really nice from a user experience 
point of view.

I've further into this for my own setup, which is Python 3.3 64-bit, Visual C++ 
Express 2010 and the Windows SDK v7.1 (plus service packs), which is probably a 
typical setup for a user looking to build Python extensions without paying for 
a compiler. Here's what I've noticed, apart from the fact that msvccompiler9.py 
is a mess.

query_vcvarsall executes "vcvarsall.bat amd64 & set". The first part, trying to 
delegate to another batch file that doesn't exist, will fail. So no environment 
variables will be set, but the PATH environment variable always exists, hence 
"ValueError: ['path']".

The DISTUTILS_USE_SDK environment variable is useless, even leaving aside the 
fact that MsSdk also needs to be defined. The idea is that distutils will trust 
that the user has set the appropriate environment variables (e.g. SetEnv.Cmd 
/Release). However, successful compilation of 64-bit extensions won't rely on 
this variable at all:

1. DISTUTILS_USE_SDK/MsSdk defined, SetEnv not called: "cl.exe" and friends 
can't be resolved and nothing works.

2. DISTUTILS_USE_SDK/MsSdk defined, SetEnv called: "cl.exe" and friends can be 
resolved and everything works.

3. DISTUTILS_USE_SDK/MsSdk undefined, SetEnv not called: "vcvarsall.bat amd64" 
will fail and we end up with "ValueError: ['path']" as above.

4. DISTUTILS_USE_SDK/MsSdk undefined, SetEnv called: in query_vcvarsall, 
"vcvarsall.bat amd64" still fails, but it doesn't matter at this point, because 
the environment variables INCLUDE, LIB, LIBPATH and PATH will exist, so parsing 
"vcvarsall.bat amd64 & set" works. This doesn't guarantee linking with the 
correct bitness, but one would hope so :)


I believe SetEnv.Cmd can be found using 
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SDKs\Windows\v7.1\WinSDKTools 
or HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Microsoft 
SDKs\Windows\v7.1\WinSDKTools.

--
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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Steve Dower]

Steve Dower added the comment:

My patches (which I've backed away from now - between wheels and monkey 
patching Distutils from a setup.py, there are enough workarounds) also handled 
the fact that VS 2008 is no longer freely/officially available, and presumably 
VS 2010 will eventually go the same way. From my point of view, VC++ 2008 
Express not including 64-bit compilers is less of a concern than VC++ 2008 
Express not being available at all.

The Windows SDK is the only way that VC9 is distributed now, but it doesn't 
install the vcvarsall.bat file that Distutils needs. The same goes for the 
version of the SDK that includes VC10. These patches look in the registry for 
the actual paths, rather than just to find a batch file that isn't a component 
of the compiler.

(FWIW, the patches should be identical apart from some Python 2/3 differences - 
the version number is parameterised.)

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Martin v . Löwis]

Martin v. Löwis added the comment:

Steve: Why are you providing a Python 3.3 patch? AFAICT, the issue does not 
exist with VS 2010 (express).

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Martin v . Löwis]

Changes by Martin v. Löwis :


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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[ipatrol]

ipatrol added the comment:

The latest patch has an indentation error in an if-else clause, but I can't 
figure out what exactly was intended by the author.

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Justin Foo]

Justin Foo added the comment:

The speedups extension for MarkupSafe (which has a pure Python fallback) on 
Python 3.3.3 64-bit was happily compiled with `pip install markupsafe` after 
applying Steve's patch and Li Wah's definition for KEY_BASE.

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Martin Dengler]

Changes by Martin Dengler :


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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Steve Dower]

Steve Dower added the comment:

I believe that is all that is missing from the patches I posted, though I'd 
have thought that having Visual C++ 2010 Express installed would be sufficient 
without the patch (though you didn't mention C++, so maybe you have a different 
one?).

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Li Wah Teng]

Li Wah Teng added the comment:

About the "'KEY_BASE' is not defined" error in Steve Dower's diff, I was able 
to fix it by adding the following line before the KEY_BASE variable is 
referenced:

KEY_BASE = r"Software\Microsoft\\"

With this, I was finally able to use the patched msvccompiler9.py to build 
PyCrypto using VS Express 2010 with Windows SDK 7.1 and Python 3.3.2 (64-bit) 
installed.

If someone can confirm that this is the only thing missing in the 2 versions of 
the msvccompiler9.diff files, it would be great.

Hope it helps!

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Bill Gale]

Bill Gale added the comment:

so i hit the same exception, here is how i solved it.

environment:
windows 7 enterprise 64 bit
python 2.7.5 64 bit
visual studio 2008 32 bit

issue:
pip installs failed with the above exception.

solution:
there are two parts.
1. install 64 bit components to vs2008
2. modify the PATH to point to 64 bit vs2008 bin folder

to confirm is this solution will help you:
check if there is an amd64 under your vs2008 bin folder:
C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\bin
if yes, this solution will not help you.
if missing follow the steps below.

step 1.
control panel
select Microsoft Visual Studio 2008 Professional -ENU
window Visual Studio 2008 Maintenance Mode is opened
click through to and select Add or Remove Features
Under Language Tools->VC++ "X64 Compilers and Tools" should be unchecked.
if it is checked, skip to step 2.
check "X64 Compilers and Tools", Update.
you may have to provide the VS2008 installation CD.
confirm that update creates bin\amd64 subfolder.

step 2.
add 64 bit subfolder to your path.
VS2008_HOME=C:\Program Files (x86)\Microsoft Visual Studio 9.0
PATH=%PATH%;%VS2008_HOME%\VC\bin;%VS2008_HOME%\VC\bin\amd64;
open new command window to receive new PATH changes.
pip installations should no die with the ValueError.

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Steve Dower]

Steve Dower added the comment:

I must have missed something when I merged files to create the diffs. In any 
case, you'll still require VC9 or VC10 to be able to build something compatible 
with a CPython release (though maybe that doesn't matter for Cython? I don't 
know).

When I get a chance I'll fix up the changes and then ping Python-Dev about 
getting a review.

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Frankie Jhou]

Frankie Jhou added the comment:

Microsoft using Visual Studio 2012 (VC 11.0) now,
Errors happened again. 
I just want to install Cython.

Error: Unable to find vcvarsall.bat
ValueError: [u'path', u'include', u'lib']
NameError: name 'KEY_BASE' is not defined
KeyError: '9.0'
error: command 'cl.exe' failed: No such file or directory

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Steve Dower]

Steve Dower added the comment:

Adding patch for 2.7.

--
Added file: http://bugs.python.org/file29755/msvccompiler9_27.diff

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Steve Dower]

Steve Dower added the comment:

I've added a patch that replaces query_vcvarsall() with an implementation that 
does not try and use the batch file. Instead, the functionality of the batch 
file (effectively, reading the base path from the registry and appending 
constants) is reproduced in Python code.

(There is a second patch for 2.7, since winreg/_winreg is different between the 
two.)

There is no reason to expect that the installation layout of VC9 and VC10 will 
change at this stage, though future updates may be required for new versions 
(though I've already added the mapping for VC11 - not that we're building 
Python with that one yet).

I have left find_vcvarsall() in there, even though it is no longer used, in 
case other tools are monkeypatching to work around the existing issue.

--
Added file: http://bugs.python.org/file29754/msvccompiler9_33.diff

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Marc-Andre Lemburg]

Marc-Andre Lemburg added the comment:

On 23.03.2013 22:33, Steve Dower wrote:
> 
> Steve Dower added the comment:
> 
>>> That's just the service pack and it won't install unless you already have 
>>> VS installed. There is no way (other than being an MSDN subscriber) to get 
>>> VS 2008 at this point - I've checked.
>>
>> There is, but you have to know what to look for :-)
> 
> Fair enough, but I can't (as a Microsoft employee) endorse that link or 
> guarantee that it won't go away :)
> 
> I still think it's worth fixing distutils to look in the right places for VC, 
> since there are multiple ways of installing it that all include different 
> batch files.

Sure, no question about that. Adding support for more MS VC versions
is always a plus :-)

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Steve Dower]

Steve Dower added the comment:

>> That's just the service pack and it won't install unless you already have VS 
>> installed. There is no way (other than being an MSDN subscriber) to get VS 
>> 2008 at this point - I've checked.
>
> There is, but you have to know what to look for :-)

Fair enough, but I can't (as a Microsoft employee) endorse that link or 
guarantee that it won't go away :)

I still think it's worth fixing distutils to look in the right places for VC, 
since there are multiple ways of installing it that all include different batch 
files.

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Marc-Andre Lemburg]

Marc-Andre Lemburg added the comment:

On 23.03.2013 16:39, Steve Dower wrote:
> 
> Steve Dower added the comment:
> 
>>> This becomes more of an issue since VC++ 2008 Express is no longer 
>>> available for download (unless you're an MSDN subscriber)
>>
>> Here: http://www.microsoft.com/en-us/download/details.aspx?id=13276
> 
> That's just the service pack and it won't install unless you already have VS 
> installed. There is no way (other than being an MSDN subscriber) to get VS 
> 2008 at this point - I've checked.

There is, but you have to know what to look for :-)

http://download.microsoft.com/download/E/8/E/E8EEB394-7F42-4963-A2D8-29559B738298/VS2008ExpressWithSP1ENUX1504728.iso

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Steve Dower]

Steve Dower added the comment:

>> This becomes more of an issue since VC++ 2008 Express is no longer available 
>> for download (unless you're an MSDN subscriber)
>
> Here: http://www.microsoft.com/en-us/download/details.aspx?id=13276

That's just the service pack and it won't install unless you already have VS 
installed. There is no way (other than being an MSDN subscriber) to get VS 2008 
at this point - I've checked.

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Takayuki SHIMIZUKAWA]

Takayuki SHIMIZUKAWA added the comment:

Hi Steve,

> This becomes more of an issue since VC++ 2008 Express is no longer available 
> for download (unless you're an MSDN subscriber)

Here: http://www.microsoft.com/en-us/download/details.aspx?id=13276

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Steve Dower]

Steve Dower added the comment:

I've dug deeper into VC10 and things are even worse there - without VS 
installed I don't think there's any way for distutils to work without 
completely replacing query_vcvarsall() (or msvc9compiler, for that matter).

I'm willing to write such a replacement, assuming I can get permission from my 
management. But I'd rather not do it if someone else is already working on it.

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Steve Dower]

Steve Dower added the comment:

('ignore extra arguments' meaning they could be returned from find_vcvarsall() 
and nobody will notice. Though it doesn't bother me if the fallback is handled 
at a higher level.)

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Steve Dower]

Steve Dower added the comment:

This becomes more of an issue since VC++ 2008 Express is no longer available 
for download (unless you're an MSDN subscriber), though the compiler itself is 
still available as part of 
http://www.microsoft.com/en-us/download/details.aspx?id=3138 (for VC9)

I'll admit I haven't read all the discussion on other issues that relates to 
this, but I see no reason why the following maps couldn't be tried if 
vcvarsall.bat is not found. This would at least handle more cases and as far as 
I can tell is the only realistic option.

VCVARS_TO_WINSDK_BAT = {
'x86' : 'bin\\vcvars32.bat',
'amd64' : 'bin\\vcvars64.bat',
'x86_amd64' : 'bin\\vcvarsx86_amd64.bat',
'x86_ia64' : 'bin\\vcvarsx86_ia64.bat',
}

VCVARS_TO_VS_BAT = {
'x86' : 'bin\\vcvars32.bat',
'amd64' : 'bin\\amd64\\vcvars64.bat',
'x86_amd64' : 'bin\\x86_amd64\\vcvarsx86_amd64.bat',
'x86_ia64' : 'bin\\x86_ia64\\vcvarsx86_ia64.bat',
}

I have no idea why, but the SDK installs the batch files into different 
locations. VCVARS_TO_VS_BAT should be unnecessary, since vcvarsall.bat should 
always exist in this case, but I see no harm in having more fallback options.

All of these scripts (at least for VC9, VC10 and VC11) will ignore extra 
arguments.

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Takayuki SHIMIZUKAWA]

Takayuki SHIMIZUKAWA added the comment:

FYI. I was able to build both 32bit/64bit.

Python 2.7.3 (32bit)
WinXP Professional SP3 (x86)
Visual Studio C++ Express 2008 SP1
Microsoft Windows SDK 2008

invoke Windows SDK's `CMD Shell` and do following:

C:\tmp> setenv /x64 /release
C:\tmp> set libpath=dummy
C:\tmp> python setup.py build --plat-name=win-amd64 build_ext 
--library_dirs=C:\Python27\libs-amd64

details is here: 
http://www.freia.jp/taka/blog/python-win32-binary-building-and-x64-cross-compiling-on-32bit-platform/index.html

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Daniel Oźminkowski]

Daniel Oźminkowski added the comment:

Python 2.7.3
WinXP Professional 2002 + SP3
Visual Studio C++ Express 2008

I bumped into this error trying to install fabric. One of the installation 
steps is compiling pycrypto.
After looking into C:\Program Files\Microsoft Visual Studio 
9.0\VC\bin\vcvars32.bat I saw:
"%VS90COMNTOOLS%vsvars32.bat"

so I run:
set VS90COMNTOOLS=C:\Program Files\Microsoft Visual Studio 9.0\Common7\Tools 
directly before pip install fabric and it compiled successfully. Still need to 
see if it works.

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Piotr Dobrogost]

Piotr Dobrogost  added the comment:

Just bumped into this issue when installing gevent 1.0b2 on Vista 64bit using 
pip. I think it would be worth to mention that although I'm not quite new to 
Python and in the past I already investigated issue with distutils not finding 
vcvarsall.bat (http://stackoverflow.com/a/5122521/95735), I didn't remember 
about DISTUTILS_USE_SDK environment variable. What I'm trying to say is that 
there are probably more people like me, having Visual Studio 2008 Express + 
Windows SDK installed but not knowing distutils. After seeing that Windows SDK 
installs 64bit compiler into VC\bin folder of Visual Studio's installation I 
thought that Python would pick it up automatically the same way it does with 
non Express versions of Visual Studio.

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Mark Dickinson]

Changes by Mark Dickinson :


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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Yap Sok Ann]

Yap Sok Ann  added the comment:

On 64-bit Windows with Visual Studio 2008 Professional, I also need to apply 
vcvars4.diff to avoid getting the ValueError. Is this something to be expected?

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Victor Lin]

Victor Lin  added the comment:

Oddly, can't reproduce the problem anymore. I try to install win7 on virtual 
machine, but it works as well. I think the issue might caused by something 
else... not sure, so strange :S

Will look into detail once I encounter this issue again.

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Martin v . Löwis]

Martin v. Löwis  added the comment:

Victor, can you apply this patch and report that it works. In particular, if it 
does *not* work, can you please report the exact way of failing? (if you can, 
please also try to investigate why it fails).

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Victor Lin]

Victor Lin  added the comment:

My environment is Windows 7 64bits with VC++ 2008 Express and Python2.7.2.

I encountered same problem, I have tried all solution posted here, but non of 
them work.

Eventually, I add "C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\bin" 
to my PATH and it works.

It appears that the command 

"vcvarsall.bat" x86 & set

outputs different values depending on whether "C:\Program Files (x86)\Microsoft 
Visual Studio 9.0\VC\bin" in PATH.

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Sean Reifschneider]

Sean Reifschneider  added the comment:

Martin: They are looking for you to review this, in particular see:

http://bugs.python.org/issue7511#msg106420

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Éric Araujo]

Éric Araujo  added the comment:

> Hmm, in http://bugs.python.org/issue7511#msg106420 Tarek appeared to
> be supportive of the patch.

I believe Martin has more knowledge about Windows.

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[R. David Murray]

Changes by R. David Murray :


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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Stefan Krah]

Stefan Krah  added the comment:

Marc-Andre Lemburg  wrote:
> >> >> Regarding the latest patch: This is not the right approach, since
> >> >> find_vcvarsall() is supposed to return the path to the vcvarsall.bat
> >> >> file and not an architecture specific setup file. It is later
> >> >> called with the arch identifier, which the arch specific setup files
> >> >> don't check or use.
> > > 
> > > The patch does not change anything for Visual Studio Pro. In Visual Studio
> > > Express (+SDK) vcvarsall.bat is broken, so the architecture specific setup
> > > files have to be used (they also work with a superfluous parameter).
> 
> I guess what I wanted to say is that find_vcvarsall() should
> return None for VC Express and code using it should then
> revert to using a new find_vcvars() function, which takes the
> architecture as parameter and returns the path to the correct
> architecture setup file.
> 
> Hacking the support into find_vcvarsall() is not the right
> approach. You have to add this support one level further up.

I agree that it is nicer if find_vcvarsall() actually returns vcvarsall.
The next level though is query_vcvarsall(), so it would still be wrong
to query vcvars64 in that function.

So unless query_vcvarsall() is renamed to something neutral like set_vcvars(),
I'm not sure where to add the support. But I imagine that renaming is out of
the question.

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[issue7511] msvc9compiler.py: ValueError when trying to compile with VC Express

[Marc-Andre Lemburg]

Marc-Andre Lemburg  added the comment:

Stefan Krah wrote:
> > 
> > Stefan Krah  added the comment:
> > 
> > Marc-Andre Lemburg  wrote:
>> >> Wouldn't it be better to have distutils tell the user about the
>> >> possible options, instead of guessing and then possibly compiling
>> >> extensions which later on don't import or import, but don't work
>> >> as expected ?
> > 
> > That would be an option, yes.
> > 
> > 
>> >> Regarding the latest patch: This is not the right approach, since
>> >> find_vcvarsall() is supposed to return the path to the vcvarsall.bat
>> >> file and not an architecture specific setup file. It is later
>> >> called with the arch identifier, which the arch specific setup files
>> >> don't check or use.
> > 
> > The patch does not change anything for Visual Studio Pro. In Visual Studio
> > Express (+SDK) vcvarsall.bat is broken, so the architecture specific setup
> > files have to be used (they also work with a superfluous parameter).

I guess what I wanted to say is that find_vcvarsall() should
return None for VC Express and code using it should then
revert to using a new find_vcvars() function, which takes the
architecture as parameter and returns the path to the correct
architecture setup file.

Hacking the support into find_vcvarsall() is not the right
approach. You have to add this support one level further up.

>> >> Also note that vcvarsall.bat can take these options:
>> >>
>> >>x86 (default), x64, amd64, x86_amd64, ia64, x86_ia64
>> >>
>> >> The x86_* options setup the cross compilers.
> > 
> > I think the patch covers all architecture specific files that are
> > present in the Visual Studio Express + SDK setup.

Right, but it doesn't cover the ones available in VS Pro (see
above), which it should for completeness.

> > Visual Studio Pro is protected from all changes by checking for
> > the presence of the file bin\amd64\vcvarsamd64.bat. This
> > could probably be done more elegantly by using some obscure
> > registry value.
> > 
> > 
> > 
> > As Thorsten mentioned, another option would be to copy bin\vcvars64.bat
> > to bin\amd64\vcvarsamd64.bat if the latter is not present.
> > 
> > This is harmless, but it is perhaps not really the business of Python
> > to mess with existing installs.

Not a good idea :-)

PS: Changing the title, since I keep getting the following error messages from 
the email interface:

There were problems handling your subject line argument list:
- not of form [arg=value,value,...;arg=value,value,...]

Subject was: "Re: [issue7511] msvc9compiler.py: ValueError: [u'path']"

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title: msvc9compiler.py: ValueError: [u'path'] -> msvc9compiler.py: ValueError 
when trying to compile with VC Express

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