================
Comment at: tools/driver/driver.cpp:258
@@ +257,3 @@
+ if (!DS) {
+ // Try again after stripping trailing -component.
+ ProgNameRef = ProgNameRef.slice(0, ProgNameRef.rfind('-'));
----------------
Might help if these comments were maybe illustrated with an example:
// Strip trailing version: clang-3.4 -> clang
// Strip trailing -component: clang-foo -> clang
http://reviews.llvm.org/D5833
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