Mention Cygwin in distutils error message about a missing VS 2003.
Fixes #1257728.
diff --git a/Lib/distutils/msvccompiler.py b/Lib/distutils/msvccompiler.py
index c96d527..0d72837 100644
--- a/Lib/distutils/msvccompiler.py
+++ b/Lib/distutils/msvccompiler.py
@@ -131,8 +131,10 @@
self.set_macro("FrameworkSDKDir", net, "sdkinstallroot")
except KeyError, exc: #
raise DistutilsPlatformError, \
- ("Visual Studio 2003 needs to be installed before "
- "building extensions for Python.")
+ ("""Python was built with Visual Studio 2003;
+extensions must be built with a compiler than can generate compatible binaries.
+Visual Studio 2003 was not found on this system. If you have Cygwin installed,
+you can try compiling with MingW32, by passing "-c mingw32" to setup.py.""")
p = r"Software\Microsoft\NET Framework Setup\Product"
for base in HKEYS: