From ed82c6651179718b23a7982c9ccc8e017b649257 Mon Sep 17 00:00:00 2001
From: bjorn3 <17426603+bjorn3@users.noreply.github.com>
Date: Tue, 24 Sep 2024 15:59:33 +0200
Subject: [PATCH] Fix linking libc++ on wasi

---
 config.llvm.toml                              | 4 +++-
 src/bootstrap/src/core/build_steps/compile.rs | 4 +++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/config.llvm.toml b/config.llvm.toml
index b8d5239e0fee0..7b5081f1a9075 100644
--- a/config.llvm.toml
+++ b/config.llvm.toml
@@ -33,8 +33,10 @@ prefix = "dist"
 sysconfdir = "etc"
 
 [target.'wasm32-wasip1-threads']
-wasi-root = "wasi-sdk-24.0-x86_64-linux/share/wasi-sysroot"
+wasi-root = "/home/bjorn/Projects/rust/wasi-sdk-24.0-x86_64-linux/share/wasi-sysroot"
 # codegen-backends = ["cranelift"]
+cc = "/home/bjorn/Projects/rust/wasi-sdk-24.0-x86_64-linux/bin/clang"
+cxx = "/home/bjorn/Projects/rust/wasi-sdk-24.0-x86_64-linux/bin/clang"
 linker = "wasi-sdk-24.0-x86_64-linux/bin/clang"
 codegen-backends = ["llvm"]
 
diff --git a/src/bootstrap/src/core/build_steps/compile.rs b/src/bootstrap/src/core/build_steps/compile.rs
index ad7a7f3d03933..778939d8df282 100644
--- a/src/bootstrap/src/core/build_steps/compile.rs
+++ b/src/bootstrap/src/core/build_steps/compile.rs
@@ -1253,7 +1253,9 @@ fn rustc_llvm_env(builder: &Builder<'_>, cargo: &mut Cargo, target: TargetSelect
 
     // Building with a static libstdc++ is only supported on linux right now,
     // not for MSVC or macOS
-    if builder.config.llvm_static_stdcpp
+    if target.contains("wasi") {
+        cargo.env("LLVM_STATIC_STDCPP", dbg!(builder.wasi_libdir(target).unwrap().join("libc++.a")));
+    } else if builder.config.llvm_static_stdcpp
         && !target.contains("freebsd")
         && !target.is_msvc()
         && !target.contains("apple")