From 0ffc60c034373cf7f347eac69e5d6c67d4294d7e Mon Sep 17 00:00:00 2001
From: ruki <waruqi@gmail.com>
Date: Thu, 26 Apr 2018 22:43:41 +0800
Subject: improve include deps for gcc

---
 xmake/modules/core/tools/gcc.lua | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/xmake/modules/core/tools/gcc.lua b/xmake/modules/core/tools/gcc.lua
index 963517af0..a79c122c4 100644
--- a/xmake/modules/core/tools/gcc.lua
+++ b/xmake/modules/core/tools/gcc.lua
@@ -322,6 +322,14 @@ end
 -- get include deps
 function _include_deps(self, sourcefile, flags)
 
+    -- support -E -MM? some old gcc does not support it at same time
+    if _g._HAS_EMM == nil then
+        _g._HAS_EMM = self:has_flags("-E -MM")
+    end
+    if not _g._HAS_EMM then
+        return {}
+    end
+
     -- the temporary file
     local tmpfile = os.tmpfile()
 
-- 
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