Build for x64 CA library

installer/installer.gyp

 #
 # Expects command line definition for variable 'target_arch'
 #   Must be either 'ia32' or 'x64'
 #
 # This .gyp file sits in directory 'installer'.
 # When gyp translates files locations, base them here.
 #
 # The solution file from this .gyp source lands in 'installer/build/<(target_arch)'.
 # When gyp does not translate file locations, base them here.
 #
 {
   'includes': [ '../defaults.gypi' ],
   'variables': 
   {
     #
+        # Architecture specification
+        # -- WiX uses {x86,x64}. VS uses {ia32,x64}
+        #
+        'conditions' :
+        [
+          [ 'target_arch=="ia32"', { 'candle_arch': 'x86' } ],
+          [ 'target_arch=="x64"', { 'candle_arch': 'x64' } ]
+        ],
+
+    #
     # Build directories, both common and architecture-specific
     # 
     'build_dir_arch': 'build/<(target_arch)',
     'build_dir_common': 'build/common', 
     
     #
     # MSI file names.
     # -- The base MSI is a single-language MSI as originally constructed.
     #      This is the one from which all transforms are derived.
     # -- The interim MSI is the working copy of the multilanguage MSI during the build process.
@@ skipping 128 matching lines @@
       'inputs':
       [
         '<@(installer_source_files)'
       ],
       'outputs':
       [
         # List must contain only a single element so that "-out" argument works correctly.
         '<(installer_object_file)'
       ],
       'action':
-        [ 'candle -nologo -dNoDefault -dVersion=91.0 -dConfiguration=Release ', '-out', '<@(_outputs)', '<(installer_source_top_file)' ]
+        [ 'candle -nologo -arch <(candle_arch) -dNoDefault -dVersion=91.0 -dConfiguration=Release', '-out', '<@(_outputs)', '<(installer_source_top_file)' ]
     } ]
   },
 
   ##################################
   # MSI targets
   # 
   # Building a multiple-language MSI requires embedding a transform for each language into a single MSI database.
   # Each step requires a locale identifier (Microsoft LCID) as a parameter and a WiX localization file (.wxl) as a source.
   # gyp does not support per-source-file parameters, so we're stuck with one project per step.
   # The naming convention for projects:
@@ skipping 705 matching lines @@
         'SubSystem': '1',   # Console
       },
     },
   },
 
   ]
 }