From b071f6405cd7622b12bd45c4d6d77c7663a97816 Mon Sep 17 00:00:00 2001 From: Hood Chatham Date: Tue, 15 Oct 2024 14:40:59 +0200 Subject: [PATCH] Emscripten: link with -sWASM_BIGINT When linking an executable without dynamic linking, this is a pure improvement. It significantly reduces code size and avoids a lot of buggy behaviors. It is supported in all browsers for many years and in all maintained versions of Node. It does change the ABI, so people who are dynamically linking with a library or executable that uses the old ABI may need to turn it off. It can be disabled if needed by passing `-Clink-arg -sWASM_BIGINT=0` to `rustc`. But few people will want to turn it off. --- .../src/spec/targets/wasm32_unknown_emscripten.rs | 3 ++- library/Cargo.lock | 4 ++-- library/std/Cargo.toml | 2 +- 3 files changed, 5 insertions(+), 4 deletions(-) diff --git a/compiler/rustc_target/src/spec/targets/wasm32_unknown_emscripten.rs b/compiler/rustc_target/src/spec/targets/wasm32_unknown_emscripten.rs index a213adadbea..a70cebbd9c8 100644 --- a/compiler/rustc_target/src/spec/targets/wasm32_unknown_emscripten.rs +++ b/compiler/rustc_target/src/spec/targets/wasm32_unknown_emscripten.rs @@ -5,7 +5,8 @@ use crate::spec::{ pub(crate) fn target() -> Target { // Reset flags for non-Em flavors back to empty to satisfy sanity checking tests. let pre_link_args = LinkArgs::new(); - let post_link_args = TargetOptions::link_args(LinkerFlavor::EmCc, &["-sABORTING_MALLOC=0"]); + let post_link_args = + TargetOptions::link_args(LinkerFlavor::EmCc, &["-sABORTING_MALLOC=0", "-sWASM_BIGINT"]); let opts = TargetOptions { os: "emscripten".into(), diff --git a/library/Cargo.lock b/library/Cargo.lock index 772f9b19695..84c20ec6f87 100644 --- a/library/Cargo.lock +++ b/library/Cargo.lock @@ -158,9 +158,9 @@ dependencies = [ [[package]] name = "libc" -version = "0.2.161" +version = "0.2.162" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "8e9489c2807c139ffd9c1794f4af0ebe86a828db53ecdc7fea2111d0fed085d1" +checksum = "18d287de67fe55fd7e1581fe933d965a5a9477b38e949cfa9f8574ef01506398" dependencies = [ "rustc-std-workspace-core", ] diff --git a/library/std/Cargo.toml b/library/std/Cargo.toml index b732fdf1696..c1ab70b714a 100644 --- a/library/std/Cargo.toml +++ b/library/std/Cargo.toml @@ -34,7 +34,7 @@ miniz_oxide = { version = "0.7.0", optional = true, default-features = false } addr2line = { version = "0.22.0", optional = true, default-features = false } [target.'cfg(not(all(windows, target_env = "msvc")))'.dependencies] -libc = { version = "0.2.161", default-features = false, features = [ +libc = { version = "0.2.162", default-features = false, features = [ 'rustc-dep-of-std', ], public = true }