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Index: llvm-toolchain-snapshot_21~++20250630094904+57f7e14b5779/clang/lib/Driver/ToolChains/WebAssembly.cpp
===================================================================
--- llvm-toolchain-snapshot_21~++20250630094904+57f7e14b5779.orig/clang/lib/Driver/ToolChains/WebAssembly.cpp
+++ llvm-toolchain-snapshot_21~++20250630094904+57f7e14b5779/clang/lib/Driver/ToolChains/WebAssembly.cpp
@@ -460,6 +460,18 @@ ToolChain::RuntimeLibType WebAssembly::G
return ToolChain::RLT_CompilerRT;
}
+ToolChain::RuntimeLibType WebAssembly::GetRuntimeLibType(
+ const ArgList &Args) const {
+ if (Arg *A = Args.getLastArg(options::OPT_rtlib_EQ)) {
+ StringRef Value = A->getValue();
+ if (Value != "compiler-rt")
+ getDriver().Diag(clang::diag::err_drv_unsupported_rtlib_for_platform)
+ << Value << "WebAssembly";
+ }
+
+ return ToolChain::RLT_CompilerRT;
+}
+
ToolChain::CXXStdlibType
WebAssembly::GetCXXStdlibType(const ArgList &Args) const {
if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
Index: llvm-toolchain-snapshot_21~++20250630094904+57f7e14b5779/clang/lib/Driver/ToolChains/WebAssembly.h
===================================================================
--- llvm-toolchain-snapshot_21~++20250630094904+57f7e14b5779.orig/clang/lib/Driver/ToolChains/WebAssembly.h
+++ llvm-toolchain-snapshot_21~++20250630094904+57f7e14b5779/clang/lib/Driver/ToolChains/WebAssembly.h
@@ -56,6 +56,7 @@ private:
llvm::opt::ArgStringList &CC1Args,
Action::OffloadKind DeviceOffloadKind) const override;
RuntimeLibType GetDefaultRuntimeLibType() const override;
+ RuntimeLibType GetRuntimeLibType(const llvm::opt::ArgList &Args) const override;
CXXStdlibType GetCXXStdlibType(const llvm::opt::ArgList &Args) const override;
void
AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs,
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