Set clang directory in gyp.

build/standalone.gypi

Index: build/standalone.gypi
diff --git a/build/standalone.gypi b/build/standalone.gypi
index 6cc05993cd5e39d0af81460bb50691dcb53bdbf3..a42c741ab3065b6830d66a4bd423b7d647657f58 100644
--- a/build/standalone.gypi
+++ b/build/standalone.gypi
@@ -33,6 +33,7 @@
   'includes': ['toolchain.gypi'],
   'variables': {
     'component%': 'static_library',
+    'make_clang_dir%': '../third_party/llvm-build/Release+Asserts',

[Michael Achenbach, 2014/11/27 11:58:02]

In common.gypi I saw the usages of <(DEPTH) but this goes two dirs backwards.
How is it controlled?

[Jakob Kummerow, 2014/11/27 12:44:14]

Black magic. I would think that <(DEPTH) should work, but if your testing
indicates otherwise, then ".." is acceptable as well.

[jochen (gone - plz use gerrit), 2014/11/27 15:07:57]

we shouldn't use DEPTH here, it's only useful for files that are referenced both
from v8 and chromium

     'asan%': 0,
     'tsan%': 0,
     'visibility%': 'hidden',
@@ -432,5 +433,20 @@
         ],  # target_conditions
       },  # target_defaults
     }],  # OS=="mac"
+    ['clang==1 and ((OS!="mac" and OS!="ios") or clang_xcode==0) '

[Michael Achenbach, 2014/11/27 11:58:02]

This is copied 1:1 from common.gypi

+        'and OS!="win"', {
+      'make_global_settings': [
+        ['CC', '<(make_clang_dir)/bin/clang'],
+        ['CXX', '<(make_clang_dir)/bin/clang++'],
+        ['CC.host', '$(CC)'],
+        ['CXX.host', '$(CXX)'],
+      ],
+    }],
+    ['clang==1 and OS=="win"', {
+      'make_global_settings': [
+        # On Windows, gyp's ninja generator only looks at CC.
+        ['CC', '<(make_clang_dir)/bin/clang-cl'],
+      ],
+    }],
   ],
 }