Index: lib/Driver/ToolChains/Gnu.cpp
===================================================================
--- lib/Driver/ToolChains/Gnu.cpp
+++ lib/Driver/ToolChains/Gnu.cpp
@@ -2173,6 +2173,7 @@
     SmallVector<StringRef, 2> Lines;
     File.get()->getBuffer().split(Lines, "\n");
     for (StringRef Line : Lines) {
+      Line = Line.trim();
       // CURRENT=triple-version
       if (Line.consume_front("CURRENT=")) {
         const std::pair<StringRef, StringRef> ActiveVersion =