From da0a931ca1ff3ebc64138491a703e7df47650bb9 Mon Sep 17 00:00:00 2001
From: Lei Zhang <thestig@chromium.org>
Date: Wed, 23 Dec 2015 20:11:11 -0800
Subject: Set CR_CLANG_REVISION to force a rebuild when the Clang version
 changes.

BUG=pdfium:335
R=thakis@chromium.org

Review URL: https://codereview.chromium.org/1549863002 .
---
 build/standalone.gypi | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/build/standalone.gypi b/build/standalone.gypi
index cdf6598438..d8c1e47894 100644
--- a/build/standalone.gypi
+++ b/build/standalone.gypi
@@ -327,6 +327,14 @@
           'V8_USE_EXTERNAL_STARTUP_DATA',
         ],
       }],  # v8_use_external_startup_data==1
+      ['clang==1 or host_clang==1', {
+        # This is here so that all files get recompiled after a clang roll and
+        # when turning clang on or off.
+        # (defines are passed via the command line, and build systems rebuild
+        # things when their commandline changes). Nothing should ever read this
+        # define.
+        'defines': ['CR_CLANG_REVISION=<!(python <(DEPTH)/tools/clang/scripts/update.py --print-revision)'],
+      }],
     ],
   },
   'xcode_settings': {
-- 
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