gyp improvements:

* Add a src/configurations.gypi file that can be included on the gyp
   command-line to enable 32-bit and 64-bit builds in the generated project
   files.

 * Make winpty.gyp work if gyp is run with Cygwin python.  It still works
   with normal python.

.gitattributes

@@ -13,4 +13,5 @@ configure       text
 
 *.sh            eol=lf
 configure       eol=lf
+VERSION.txt     eol=lf
 shared/GetCommitHash.cmd text eol=crlf

.gitignore

@@ -2,9 +2,10 @@
 *.suo
 *.vcxproj
 *.vcxproj.filters
-Default
 winpty.sdf
 winpty.opensdf
 /config.mk
 /build
 /ship/packages
+/src/Default
+/src/Release

src/configurations.gypi

@@ -0,0 +1,39 @@
+# By default gyp/msbuild build for 32-bit Windows.  To build 64-bit Windows,
+# use this file.
+#
+#     C:\proj\winpty\src>gyp -I configurations.gypi
+#
+# This command generates Visual Studio project files with a Release
+# configuration and two Platforms--Win32 and x64.  Both can be built:
+#
+#     C:\proj\winpty\src>msbuild winpty.sln /p:Platform=Win32
+#     C:\proj\winpty\src>msbuild winpty.sln /p:Platform=x64
+#
+# The output is placed in:
+#
+#     C:\proj\winpty\src\Release\Win32
+#     C:\proj\winpty\src\Release\x64
+#
+# This file is not included by default, because I suspect it would interfere
+# with node-gyp, which has a different system for building 32-vs-64-bit
+# binaries.  It uses a common.gypi, and the project files it generates can only
+# build a single architecture, the output paths are not differentiated by
+# architecture.
+
+{
+    'target_defaults': {
+        'default_configuration': 'Release_Win32',
+        'configurations': {
+            'Release_Win32': {
+                'msvs_configuration_platform': 'Win32',
+            },
+            'Release_x64': {
+                'msvs_configuration_platform': 'x64',
+            },
+        },
+        'msvs_configuration_attributes': {
+            'OutputDirectory': '$(SolutionDir)$(ConfigurationName)\\$(Platform)',
+            'IntermediateDirectory': '$(ConfigurationName)\\$(Platform)\\obj\\$(ProjectName)',
+        }
+    }
+}

src/winpty.gyp

@@ -12,9 +12,9 @@
             '_UNICODE',
             '_WIN32_WINNT=0x0501',
             'NOMINMAX',
-            'WINPTY_VERSION=<!(type ..\VERSION.txt)',
+            'WINPTY_VERSION=<!(cmd /c "cd .. && type VERSION.txt")',
             'WINPTY_VERSION_SUFFIX=<(VERSION_SUFFIX)',
-            'WINPTY_COMMIT_HASH=<!(shared\GetCommitHash.cmd)',
+            'WINPTY_COMMIT_HASH=<!(cmd /c "cd shared && GetCommitHash.cmd")',
         ],
     },
     'targets' : [