ninja build tutorial

Ninja安装：
sudo apt install ninja-build

C语言代码：

#include <stdio.h>

int main()
{
    printf("hello ninja.\n");
    return 0;
}

 “build.ninja”:

rule cc
  command = gcc $in -o $out
#rule clean
#  command = rm $out

# If left unspecified, builds get the outer $cflags.
build main: cc main.c

编译：
sudo ninja
sudo ./main

结果：