Application Compilation

In the early days, because processor performance was limited, storage space was scarce, and compilation throughput was low, early development boards generally used cross-compilation. Cross-compilation has several drawbacks: it cannot compile offline, the workflow is cumbersome, and the environment is complex to configure.

The GM-3568JHF processor is powerful, and compiling programs directly on the development board is fast. We therefore recommend compiling directly with the GCC toolchain integrated on the board, which saves a great deal of time otherwise spent transferring files.

The GM-3568JHF ships with a GCC compiler. We can view the GCC version with the following commands.

#查看gcc命令
gcc -v

#查看gcc的安装路径
which gcc

#如果没有gcc，下载安装
sudo apt update
sudo apt install gcc -y

As shown below:

GCC

The author's gcc version is 12.2.0. The gcc version number may differ depending on the image and system, but this does not affect compilation.

1 Compile an executable

Code:

#include <stdio.h>

int main(void)
{
        printf("Hello World!\n");
        return 0;
}

Build steps:

#使用vi创建hello.c文件
 vi hello.c

 #键盘敲入'i'或'a'进入编辑模式
 #复制代码到vim编辑器里
 #键盘敲入'Esc'键
 #然后敲入":wq" 保存并退出

 #也可以直接把源码下载到板卡上，然后进行编译
 #输入命令编译
 gcc -o hello hello.c

 #执行程序
 ./hello

As shown below:

GCC_2