libimagequant 在 mac 平台编译双架构
在 macOS 上编译 libimagequant 的双架构（aarch64 + x86_64）通用二进制库，以下是完整步骤：
1. 准备 Rust 工具链
# 安装两个目标平台
rustup target add aarch64-apple-darwin x86_64-apple-darwin# 确认安装成功
rustup target list --installed
# 应输出：aarch64-apple-darwin, x86_64-apple-darwin
2. 分别编译两个架构
编译 ARM64 架构 (M1/M2)
cd /Users/admin/open_lib/libimagequant/imagequant-sys
cargo build --release --target aarch64-apple-darwin
编译 x86_64 架构 (Intel)
cargo build --release --target x86_64-apple-darwin
3. 合并为通用二进制 (Universal Binary)
# 创建输出目录
mkdir -p target/universal# 使用 lipo 合并静态库
lipo -create \-output target/universal/libimagequant.a \target/aarch64-apple-darwin/release/libimagequant_sys.a \target/x86_64-apple-darwin/release/libimagequant_sys.a# 验证合并结果
lipo -info target/universal/libimagequant.a
# 应输出：Architectures in the fat file: target/universal/libimagequant.a are: x86_64 arm64
4. 配置 Cargo 自动构建 (可选)
在 imagequant-sys/Cargo.toml 中添加构建脚本配置：
[package]
build = "build.rs"[target.'cfg(target_os = "macos")'.dependencies]
libc = "0.2"
在 build.rs 中添加：
fn main() {println!("cargo:rerun-if-changed=build.rs");#[cfg(target_os = "macos")]{println!("cargo:rustc-link-search=native=target/universal");println!("cargo:rustc-link-lib=static=imagequant");}
}
5. 验证最终库
# 检查文件类型
file target/universal/libimagequant.a
# 应显示：Mach-O universal binary with 2 architectures# 检查符号表
nm -arch arm64 target/universal/libimagequant.a | head
nm -arch x86_64 target/universal/libimagequant.a | head
6. 清理与重建
# 完全清理后重建
cargo clean
cargo build --release --target aarch64-apple-darwin
cargo build --release --target x86_64-apple-darwin
lipo -create ... # 重复步骤3
常见问题解决
-
lipo报错 "has same architecture"
删除旧库再合并：
rm target/universal/libimagequant.a
- 缺少
core/std错误
确保工具链完整：
rustup component add rust-src
- Xcode 兼容性问题
更新命令行工具：
xcode-select --install
最终目录结构
libimagequant/
├── target/
│ ├── aarch64-apple-darwin/
│ ├── x86_64-apple-darwin/
│ └── universal/
│ └── libimagequant.a # 通用二进制
└── imagequant-sys/└── target/... # 子项目构建目录
通过以上步骤，你将获得一个同时支持 Intel 和 Apple Silicon 的静态库，可直接用于跨平台分发。
全流程记录
# 1. 进入项目目录
cd /Users/admin/open_lib/libimagequant/imagequant-sys# 2. 清理并编译ARM64架构 (M1/M2)
cargo clean && cargo build --target aarch64-apple-darwin
# 输出示例：
# Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 41s# 3. 验证ARM64二进制
cd ../target/aarch64-apple-darwin/debug
lipo -info libimagequant_sys.a
# 应输出：Non-fat file: libimagequant_sys.a is architecture: arm64# 4. 返回项目目录编译x86_64架构 (Intel)
cd ../../../../imagequant-sys
cargo build --release --target x86_64-apple-darwin
# 输出示例：
# Finished `release` profile [optimized] target(s) in 6.58s# 5. 验证x86_64二进制
cd ../target/x86_64-apple-darwin/release
lipo -info libimagequant_sys.a
# 应输出：Non-fat file: libimagequant_sys.a is architecture: x86_64# 6. 创建通用二进制
cd ../../..
mkdir -p universal
lipo -create \target/aarch64-apple-darwin/debug/libimagequant_sys.a \target/x86_64-apple-darwin/release/libimagequant_sys.a \-output universal/libimagequant_universal.a# 7. 最终验证
lipo -info universal/libimagequant_universal.a
# 应输出：Architectures in the fat file: universal/libimagequant_universal.a are: arm64 x86_64