[PATCH] LibDriver, llvm-lib: introduce.

[Rafael Ávila de Espíndola]

This is fine from the llvm side.

Rui, is this a convenient interface for lld to use?


================
Comment at: lib/LibDriver/LibDriver.cpp:71
@@ +70,3 @@
+namespace {
+class StrDupSaver : public cl::StringSaver {
+  std::vector<char *> Dups;
----------------
We really should just move the string saver that rui implemented to llvm and make it the one true string saver.
At least add a fixme about that.

http://reviews.llvm.org/D10297

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