1.2 rust cargo

cargo是rust的编译与打包工具，可将rust打包成为一个可执行性文件。生成的可执行性文件不能跨系统的大版本，比如在linux7上打包，那么程序无法在linux6上执行。

# cargo new hello_cargo

Created binary (application) `hello_cargo` package

# cd hello_cargo

# ls

Cargo.toml src

# ll -a

total

drwxr-xr-x  root root  Jan  : .

drwxr-xr-x  root root  Jan  : ..

-rw-r--r--  root root   Jan  : Cargo.toml

drwxr-xr-x  root root  Jan  : .git

-rw-r--r--  root root    Jan  : .gitignore

drwxr-xr-x  root root  Jan  : src

# cat Cargo.toml

[package]

name = "hello_cargo"

version = "0.1.0"

authors = ["tanpf <itoracle@163.com>"]

edition = ""

[dependencies]

# cd src

# ls

main.rs

# cat main.rs

fn main() {

    println!("Hello, world!");

}

[root@itoracle src]# cargo build

   Compiling hello_cargo v0.1.0 (/usr/local/automng/src/rust/test/hello_cargo)

    Finished dev [unoptimized + debuginfo] target(s) in .05s

[root@itoracle src]# ll

total

-rw-r--r--  root root  Jan  : main.rs

[root@itoracle hello_cargo]# ./target/debug/hello_cargo

Hello, world!

[root@itoracle hello_cargo]# cargo run

    Finished dev [unoptimized + debuginfo] target(s) in .01s

     Running `target/debug/hello_cargo`

Hello, world!

[root@itoracle hello_cargo]#

[root@itoracle hello_cargo]#

[root@itoracle hello_cargo]# vim src/main.rs 

fn main() {

    println!("Hello, world!");

    println!("过年回家的火车票，为啥每次都抢不到呢");

}

如果修改了代码，cargo run会先编译再运行

[root@itoracle hello_cargo]# cargo run

   Compiling hello_cargo v0.1.0 (/usr/local/automng/src/rust/test/hello_cargo)

    Finished dev [unoptimized + debuginfo] target(s) in .46s

     Running `target/debug/hello_cargo`

Hello, world!

过年回家的火车票，为啥每次都抢不到呢

cargo check进行代码的编译，但不生成可执行文件，速度比cargo build快很多，当代码比较多时，可以先check

[root@itoracle hello_cargo]# cargo check

    Checking hello_cargo v0.1.0 (/usr/local/automng/src/rust/test/hello_cargo)

    Finished dev [unoptimized + debuginfo] target(s) in .13s 

1.2 rust cargo的相关教程结束。