Fix vcvarsall.bat to install Python-2.7 x64 extensions with v90 instead of sdk7

[UPDATE 2014-11-13] Free x86 and AMD64 (x86-64) VC90 c-compilers for Python-2.7 are now available from Microsoft. The free VC90 compilers can be used to install package source that contains c-extensions using either pip, setuptools or distutils. For example, pip install dulwich will build and install the Python Git implementation which contains several speedups as c-extensions.

Previously in order to install Python-2.7 packages with extensions on my 64-bit Windows-7 machine, I have been using the Windows SDK-7 shell and setting the target and some environmental variables manually. What a drag! Then a few days ago, I discovered that the reason vcvarsall.bat has been complaining that it can't find my x64 compilers, even tho they are right there in my Visual Studio 2008 VC folder is because the path the the batch file that sets up the environmental variables for the x64 compiler was wrong. In fact all of the paths were wrong except for vcvars32.bat.

I posted a patch in this Gist:

	--- C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\vcvarsall.txt
	+++ C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\vcvarsall.bat
	@@ -16,23 +16,23 @@
	goto :eof
	:amd64
	-if not exist "%~dp0bin\amd64\vcvarsamd64.bat" goto missing
	-call "%~dp0bin\amd64\vcvarsamd64.bat"
	+if not exist "%~dp0bin\vcvars64.bat" goto missing
	+call "%~dp0bin\vcvars64.bat"
	goto :eof
	:ia64
	-if not exist "%~dp0bin\ia64\vcvarsia64.bat" goto missing
	-call "%~dp0bin\ia64\vcvarsia64.bat"
	+if not exist "%~dp0bin\vcvarsia64.bat" goto missing
	+call "%~dp0bin\vcvarsia64.bat"
	goto :eof
	:x86_amd64
	-if not exist "%~dp0bin\x86_amd64\vcvarsx86_amd64.bat" goto missing
	-call "%~dp0bin\x86_amd64\vcvarsx86_amd64.bat"
	+if not exist "%~dp0bin\vcvarsx86_amd64.bat" goto missing
	+call "%~dp0bin\vcvarsx86_amd64.bat"
	goto :eof
	:x86_ia64
	-if not exist "%~dp0bin\x86_ia64\vcvarsx86_ia64.bat" goto missing
	-call "%~dp0bin\x86_ia64\vcvarsx86_ia64.bat"
	+if not exist "%~dp0bin\vcvarsx86_ia64.bat" goto missing
	+call "%~dp0bin\vcvarsx86_ia64.bat"
	goto :eof
	:usage

view raw vcvarsall.bat.patch hosted with ❤ by GitHub

	@echo off
	if "%1" == "" goto x86
	if not "%2" == "" goto usage
	if /i %1 == x86 goto x86
	if /i %1 == amd64 goto amd64
	if /i %1 == x64 goto amd64
	if /i %1 == ia64 goto ia64
	if /i %1 == x86_amd64 goto x86_amd64
	if /i %1 == x86_ia64 goto x86_ia64
	goto usage
	:x86
	if not exist "%~dp0bin\vcvars32.bat" goto missing
	call "%~dp0bin\vcvars32.bat"
	goto :eof
	:amd64
	if not exist "%~dp0bin\amd64\vcvarsamd64.bat" goto missing
	call "%~dp0bin\amd64\vcvarsamd64.bat"
	goto :eof
	:ia64
	if not exist "%~dp0bin\ia64\vcvarsia64.bat" goto missing
	call "%~dp0bin\ia64\vcvarsia64.bat"
	goto :eof
	:x86_amd64
	if not exist "%~dp0bin\x86_amd64\vcvarsx86_amd64.bat" goto missing
	call "%~dp0bin\x86_amd64\vcvarsx86_amd64.bat"
	goto :eof
	:x86_ia64
	if not exist "%~dp0bin\x86_ia64\vcvarsx86_ia64.bat" goto missing
	call "%~dp0bin\x86_ia64\vcvarsx86_ia64.bat"
	goto :eof
	:usage
	echo Error in script usage. The correct usage is:
	echo %0 [option]
	echo where [option] is: x86 ^| ia64 ^| amd64 ^| x86_amd64 ^| x86_ia64
	echo:
	echo For example:
	echo %0 x86_ia64
	goto :eof
	:missing
	echo The specified configuration type is missing. The tools for the
	echo configuration might not be installed.
	goto :eof

view raw vcvarsall.txt hosted with ❤ by GitHub

Now to install packages that include extensions, EG: Dulwich, I just use pip install -U dulwich and easy peasy!