From 37f576c62a330ab2bda9be51c6bf1ba5e0dc8aea Mon Sep 17 00:00:00 2001
From: bjorn3 <17426603+bjorn3@users.noreply.github.com>
Date: Thu, 11 Apr 2024 11:22:11 +0000
Subject: [PATCH] Disable Ctrl-C handling on WASM

WASM fundamentally doesn't support signals. If WASI ever gets support
for notifying the guest process of a Ctrl-C that happened, this would
have to be done through the guest process polling for the signal, which
will require thread support in WASI too to be compatible with the api
provided by the ctrlc crate.
---
 compiler/rustc_driver_impl/Cargo.toml | 6 +++++-
 compiler/rustc_driver_impl/src/lib.rs | 1 +
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/compiler/rustc_driver_impl/Cargo.toml b/compiler/rustc_driver_impl/Cargo.toml
index e4fb13822f8..a8bba3afb7e 100644
--- a/compiler/rustc_driver_impl/Cargo.toml
+++ b/compiler/rustc_driver_impl/Cargo.toml
@@ -5,7 +5,6 @@ edition = "2021"
 
 [dependencies]
 # tidy-alphabetical-start
-ctrlc = "3.4.4"
 rustc_ast = { path = "../rustc_ast" }
 rustc_ast_lowering = { path = "../rustc_ast_lowering" }
 rustc_ast_passes = { path = "../rustc_ast_passes" }
@@ -66,6 +65,11 @@ features = [
     "Win32_System_Diagnostics_Debug",
 ]
 
+[target.'cfg(not(target_family = "wasm"))'.dependencies]
+# tidy-alphabetical-start
+ctrlc = "3.4.4"
+# tidy-alphabetical-end
+
 [features]
 # tidy-alphabetical-start
 llvm = ['rustc_interface/llvm']
diff --git a/compiler/rustc_driver_impl/src/lib.rs b/compiler/rustc_driver_impl/src/lib.rs
index 1f44621736c..b3cba4dbfc2 100644
--- a/compiler/rustc_driver_impl/src/lib.rs
+++ b/compiler/rustc_driver_impl/src/lib.rs
@@ -1500,6 +1500,7 @@ pub fn init_logger(early_dcx: &EarlyDiagCtxt, cfg: rustc_log::LoggerConfig) {
 /// Install our usual `ctrlc` handler, which sets [`rustc_const_eval::CTRL_C_RECEIVED`].
 /// Making this handler optional lets tools can install a different handler, if they wish.
 pub fn install_ctrlc_handler() {
+    #[cfg(not(target_family = "wasm"))]
     ctrlc::set_handler(move || {
         // Indicate that we have been signaled to stop. If we were already signaled, exit
         // immediately. In our interpreter loop we try to consult this value often, but if for