[Clang] Automatically link the compiler-rt for GPUs if present (#109152)

jhuber6 · web-flow · commit eb48aac7d40e · 2024-09-25T12:58:10.000-07:00
Summary:
This automically links `copmiler-rt` for offloading languages if it
exists in the resource directory.
diff --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -9242,6 +9242,12 @@ void LinkerWrapper::ConstructJob(Compilation &C, const JobAction &JA,
         CmdArgs.push_back(Args.MakeArgString(
             "--device-linker=" + TC.getTripleString() + "=" + "-lm"));
       }
+      auto HasCompilerRT = getToolChain().getVFS().exists(
+          TC.getCompilerRT(Args, "builtins", ToolChain::FT_Static));
+      if (HasCompilerRT)
+        CmdArgs.push_back(
+            Args.MakeArgString("--device-linker=" + TC.getTripleString() + "=" +
+                               "-lclang_rt.builtins"));
     });
   }
 

Original file line number	Diff line number	Diff line change
`@@ -9242,6 +9242,12 @@ void LinkerWrapper::ConstructJob(Compilation &C, const JobAction &JA,`
`9242`	`9242`	`CmdArgs.push_back(Args.MakeArgString(`
`9243`	`9243`	`"--device-linker=" + TC.getTripleString() + "=" + "-lm"));`
`9244`	`9244`	`}`
	`9245`	`+ auto HasCompilerRT = getToolChain().getVFS().exists(`
	`9246`	`+ TC.getCompilerRT(Args, "builtins", ToolChain::FT_Static));`
	`9247`	`+ if (HasCompilerRT)`
	`9248`	`+ CmdArgs.push_back(`
	`9249`	`+ Args.MakeArgString("--device-linker=" + TC.getTripleString() + "=" +`
	`9250`	`+ "-lclang_rt.builtins"));`
`9245`	`9251`	`});`
`9246`	`9252`	`}`
`9247`	`9253`