[clang] [Flang] Link `-lflang_rt.runtime` if available on the device (PR #132737)

[Joseph Huber via cfe-commits]

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@@ -9337,6 +9337,11 @@ void LinkerWrapper::ConstructJob(Compilation &C, const JobAction &JA,
         CmdArgs.push_back(
             Args.MakeArgString("--device-linker=" + TC.getTripleString() + "=" +
                                "-lclang_rt.builtins"));
+      bool HasFlangRT = HasCompilerRT && C.getDriver().IsFlangMode();
+      if (HasCompilerRT)
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jhuber6 wrote:

Don't know how I missed that.

https://github.com/llvm/llvm-project/pull/132737