From b81b3f479104e1132ac28e53e311f5f3de6deb9e Mon Sep 17 00:00:00 2001
From: Andrzej Kotulski <akotulski@fb.com>
Date: Fri, 3 Jun 2016 02:25:40 -0700
Subject: [PATCH] Always run C compiler with -fsyntax-only

Summary:
buck #infer flavor doesn't rely on .o files so we don't need to generate them.
It will save memory/IO and possibly time

Reviewed By: jvillard, martinoluca

Differential Revision: D3379463

fbshipit-source-id: 1d48f7a
---
 infer/lib/python/inferlib/capture/buck.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/infer/lib/python/inferlib/capture/buck.py b/infer/lib/python/inferlib/capture/buck.py
index b4c65bd82..04badf560 100644
--- a/infer/lib/python/inferlib/capture/buck.py
+++ b/infer/lib/python/inferlib/capture/buck.py
@@ -155,8 +155,11 @@ class BuckAnalyzer:
             print('Please run this command from the folder where .buckconfig '
                   'is located')
             return os.EX_USAGE
+        env_vars = utils.read_env()
+        env_vars['FCP_RUN_SYNTAX_ONLY'] = '1'
+        env = utils.encode_env(env_vars)
         subprocess.check_call(
-            self.cmd + self.create_cxx_buck_configuration_args())
+            self.cmd + self.create_cxx_buck_configuration_args(), env=env)
         return os.EX_OK
 
     def capture_with_flavors(self):