From 57d918e3f590cc9b0b804992c8e0208e3a394569 Mon Sep 17 00:00:00 2001
From: Manos Pitsidianakis <manos@wasmer.io>
Date: Sun, 21 Aug 2022 16:12:52 +0300
Subject: [PATCH] Bring libwasmer-headless.a from 22MiB to 7.2MiB (on my
 machine)

By using lto optimization flags.

A qjs.wasm executable using the headless engine now weights 4.6MiB:

% du -sh qjs-he*.out
 20M    qjs-headfull.out
4.6M    qjs-headless.out
---
 Makefile             | 4 ++--
 lib/c-api/Cargo.toml | 2 +-
 lib/wasi/Cargo.toml  | 3 ---
 3 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/Makefile b/Makefile
index a6be323b4d9..aa38bd87cf8 100644
--- a/Makefile
+++ b/Makefile
@@ -389,7 +389,7 @@ build-wasmer-headless-minimal: RUSTFLAGS += -C panic=abort
 build-wasmer-headless-minimal:
 	RUSTFLAGS="${RUSTFLAGS}" xargo build --target $(HOST_TARGET) --release --manifest-path=lib/cli/Cargo.toml --no-default-features --features headless-minimal --bin wasmer-headless
 ifeq ($(IS_DARWIN), 1)
-	strip -u target/$(HOST_TARGET)/release/wasmer-headless
+	strip target/$(HOST_TARGET)/release/wasmer-headless
 else ifeq ($(IS_WINDOWS), 1)
 	strip --strip-unneeded target/$(HOST_TARGET)/release/wasmer-headless.exe
 else
@@ -455,7 +455,7 @@ build-capi-llvm-universal: capi-setup
 # Headless (we include the minimal to be able to run)
 
 build-capi-headless: capi-setup
-	RUSTFLAGS="${RUSTFLAGS} -C panic=abort" $(CARGO_BINARY) build $(CARGO_TARGET) --manifest-path lib/c-api/Cargo.toml --release \
+	RUSTFLAGS="${RUSTFLAGS} -C panic=abort -C link-dead-code -C lto -O -C embed-bitcode=yes" $(CARGO_BINARY) build $(CARGO_TARGET) --manifest-path lib/c-api/Cargo.toml --release \
 		--no-default-features --features compiler-headless,wasi
 
 build-capi-headless-ios: capi-setup
diff --git a/lib/c-api/Cargo.toml b/lib/c-api/Cargo.toml
index d275c0fff82..072da4e3d9f 100644
--- a/lib/c-api/Cargo.toml
+++ b/lib/c-api/Cargo.toml
@@ -17,7 +17,7 @@ edition = "2018"
 # a conflict with the existing `wasmer` crate, see below.
 name = "wasmer" # ##lib.name##
                 # ^ DO NOT REMOVE, it's used the `Makefile`, see `build-docs-capi`.
-crate-type = ["cdylib", "rlib", "staticlib"]
+crate-type = ["staticlib", "cdylib"] #"cdylib", "rlib", "staticlib"]
 
 [dependencies]
 # We rename `wasmer` to `wasmer-api` to avoid the conflict with this
diff --git a/lib/wasi/Cargo.toml b/lib/wasi/Cargo.toml
index bfa746e2921..798d1304668 100644
--- a/lib/wasi/Cargo.toml
+++ b/lib/wasi/Cargo.toml
@@ -10,9 +10,6 @@ license = "MIT"
 readme = "README.md"
 edition = "2018"
 
-[lib]
-crate-type = ["cdylib", "rlib"]
-
 [dependencies]
 cfg-if = "1.0"
 thiserror = "1"