Merge pull request #2514 from dtolnay/precompiled

Add experiment to produce precompiled builds of serde_derive

Author: dtolnay

precompiled/.gitignore

@@ -0,0 +1 @@
+/x86_64-unknown-linux-gnu/serde_derive

precompiled/Cargo.toml

@@ -0,0 +1,14 @@
+[workspace]
+members = ["proc-macro2", "serde_derive"]
+resolver = "2"
+
+[patch.crates-io]
+proc-macro2 = { path = "proc-macro2" }
+
+[profile.precompiled]
+inherits = "release"
+codegen-units = 1
+lto = true
+opt-level = "z"
+panic = "abort"
+strip = true

precompiled/build.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+cd -- "$(dirname -- "${BASH_SOURCE[0]}")" &>/dev/null
+
+cargo +nightly build \
+    --manifest-path serde_derive/Cargo.toml \
+    --bin serde_derive \
+    --profile precompiled \
+    -Z unstable-options \
+    -Z build-std=std,panic_abort \
+    -Z build-std-features=panic_immediate_abort \
+    --target x86_64-unknown-linux-musl \
+    --out-dir x86_64-unknown-linux-gnu
+
+#upx --best --lzma x86_64-unknown-linux-gnu/serde_derive

precompiled/proc-macro2/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "proc-macro2"
+version = "1.0.66"
+edition = "2021"
+publish = false
+
+[dependencies]
+proc-macro2 = { package = "proc-macro2-fallback", version = "1" }