Frontend: Add -target-linker-version, for specifying the version string of the
linker in use.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@110871 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/CompilerInvocation.cpp b/lib/Frontend/CompilerInvocation.cpp
index aa0c317..2756c07 100644
--- a/lib/Frontend/CompilerInvocation.cpp
+++ b/lib/Frontend/CompilerInvocation.cpp
@@ -698,6 +698,10 @@
     Res.push_back("-target-abi");
     Res.push_back(Opts.ABI);
   }
+  if (!Opts.LinkerVersion.empty()) {
+    Res.push_back("-target-linker-version");
+    Res.push_back(Opts.LinkerVersion);
+  }
   Res.push_back("-cxx-abi");
   Res.push_back(Opts.CXXABI);
   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i) {
@@ -1441,8 +1445,9 @@
   Opts.ABI = Args.getLastArgValue(OPT_target_abi);
   Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
   Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
-  Opts.Triple = Args.getLastArgValue(OPT_triple);
   Opts.Features = Args.getAllArgValues(OPT_target_feature);
+  Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
+  Opts.Triple = Args.getLastArgValue(OPT_triple);
 
   // Use the host triple if unspecified.
   if (Opts.Triple.empty())