[PATCH] Entry point function should never be dead-stripped.

[Shankar Kalpathi Easwaran]

================
Comment at: include/lld/Core/LinkingContext.h:229
@@ -221,2 +228,3 @@
     _initialUndefinedSymbols.push_back(symbolName);
+    _deadStripRoots.push_back(symbolName);
   }
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Can we add a seperate function to targetInfo to add symbol to deadStripRoot set so that a list of symbols can be added to the deadStripRoot set.

I also think that we want to add to the deadStripRoot set only if the linker flag deadstrip is enabled.


http://llvm-reviews.chandlerc.com/D1524