Change win32 build to reinsert VC Library Manifest

Added a change at the end of the build process that would reinsert the VC library manifest.  This patch will fix issues when an embedded program does not have a manifest pointing to the VC 2008 runtime library, such as in an apache/mod_python situation.

Signed-off-by: Jason Erickson <jerickso@stickpeople.com>

psycopg/_psycopg.vc9.manifest

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+  <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
+    <security>
+      <requestedPrivileges>
+        <requestedExecutionLevel level="asInvoker" uiAccess="false"></requestedExecutionLevel>
+      </requestedPrivileges>
+    </security>
+  </trustInfo>
+  <dependency>
+    <dependentAssembly>
+      <assemblyIdentity type="win32" name="Microsoft.vc90.CRT" version="9.0.21022.8" processorArchitecture="*" publicKeyToken="1fc8b3b9a1e18e3b"></assemblyIdentity>
+    </dependentAssembly>
+  </dependency>
+</assembly>

setup.py

@@ -52,6 +52,7 @@ from distutils.errors import DistutilsFileError
 from distutils.command.build_ext import build_ext
 from distutils.sysconfig import get_python_inc
 from distutils.ccompiler import get_default_compiler
+from distutils.dep_util import newer_group
 
 # Take a look at http://www.python.org/dev/peps/pep-0386/
 # for a consistent versioning pattern.
@@ -130,6 +131,25 @@ class psycopg_build_ext(build_ext):
     def get_pg_config(self, kind):
         return get_pg_config(kind, self.pg_config)
 
+    def build_extension(self, ext):
+        build_ext.build_extension(self, ext)
+
+        # For MSVC compiler and Python 2.6/2.7 (aka VS 2008), re-insert the
+        #  Manifest into the resulting .pyd file.
+        sysVer = sys.version_info[:2]
+        if self.get_compiler().lower().startswith('msvc') and \
+                sysVer in ((2,6), (2,7)):
+          sources = list(ext.sources)
+
+          ext_path = self.get_ext_fullpath(ext.name)
+          depends = sources + ext.depends
+          if not (self.force or newer_group(depends, ext_path, 'newer')):
+              return
+
+          self.compiler.spawn(['mt.exe', '-nologo', '-manifest',
+                os.path.join('psycopg', '_psycopg.vc9.manifest'),
+                '-outputresource:%s;2' % (os.path.join(self.build_lib, 'psycopg2', '_psycopg.pyd'))])
+
     def finalize_win32(self):
         """Finalize build system configuration on win32 platform."""
         import struct