Support target/host architecture with ninja iOS builds

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index cf259c31818fd593dc1bd2f313690a3916e71927..8bc82d4e893919d120db00439a02b908da76d228 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -4030,6 +4030,17 @@
           ],
         },
         'target_conditions': [
+          ['_toolset=="host"', {
+            'xcode_settings': {
+              'SDKROOT': 'macosx<(mac_sdk)',  # -isysroot
+              'MACOSX_DEPLOYMENT_TARGET': "10.6",

[stuartmorgan, 2013/05/06 11:56:35]

This is now hard-coded in a bunch of places in this file. Maybe it should be a
shared ios/mac variable?

[justincohen, 2013/05/06 14:17:36]

Done.

+            },
+          }],
+          ['_toolset=="target"', {
+            'xcode_settings': {
+              'IPHONEOS_DEPLOYMENT_TARGET': '<(ios_deployment_target)',
+            },
+          }],
           ['_type=="executable"', {
             'configurations': {
               'Release_Base': {
@@ -4426,7 +4437,6 @@
         'ARCHS': '$(ARCHS_UNIVERSAL_IPHONE_OS)',
         # Just build armv7, until armv7s is correctly tested.
         'VALID_ARCHS': 'armv7 i386',
-        'IPHONEOS_DEPLOYMENT_TARGET': '<(ios_deployment_target)',
         # Target both iPhone and iPad.
         'TARGETED_DEVICE_FAMILY': '1,2',
       }],