[LinkerWrapper] Do not include config files for device linking

[jhuber6]

Summary:
The device linking phase only wants to create the necessary commands to
emit the device binary. There were issues where the user's default
config file was being used and passing incompatible arguments to the
device compilation step. Simply disable this since we do not want any
additional arguments to these clang invocations.

[llvmbot]

@llvm/pr-subscribers-clang

Author: Joseph Huber (jhuber6)

Changes

Summary:
The device linking phase only wants to create the necessary commands to
emit the device binary. There were issues where the user's default
config file was being used and passing incompatible arguments to the
device compilation step. Simply disable this since we do not want any
additional arguments to these clang invocations.

---

Full diff: https://github.com/llvm/llvm-project/pull/87659.diff

1 Files Affected:

• (modified) clang/tools/clang-linker-wrapper/ClangLinkerWrapper.cpp (+1)

diff --git a/clang/tools/clang-linker-wrapper/ClangLinkerWrapper.cpp b/clang/tools/clang-linker-wrapper/ClangLinkerWrapper.cpp
index c60be2789bd61e..73e695a67093e6 100644
--- a/clang/tools/clang-linker-wrapper/ClangLinkerWrapper.cpp
+++ b/clang/tools/clang-linker-wrapper/ClangLinkerWrapper.cpp
@@ -458,6 +458,7 @@ Expected<StringRef> clang(ArrayRef<StringRef> InputFiles, const ArgList &Args) {
   StringRef OptLevel = Args.getLastArgValue(OPT_opt_level, "O2");
   SmallVector<StringRef, 16> CmdArgs{
       *ClangPath,
+      "--no-default-config",
       "-o",
       *TempFileOrErr,
       Args.MakeArgString("--target=" + Triple.getTriple()),