修复 GCC编译时可能会导致的error: unknown type name 'clock_t' 问题

[Atul-8]

error: unknown type name 'clock_t'
https://club.rt-thread.org/ask/question/981978b1d833e9cf.html

拉取/合并请求描述：(PR description)

[

本实验基于 stm32cubeMX生成的 RT-thread-nano 工程实践,
并且使用 MDK工程和GCC工程(makeflie)兼容调用的方式进行调试验证; 结果为:能很好解决问题并不存在干涉现象.

为什么提交这份PR (why to submit this PR)

完善rt-thread 更好在gcc里面使用

你的解决方案是什么 (what is your solution)

在该头文件(time.h)添加以下四行内容:

#if defined(GNUC)
typedef long long time_t;
typedef long suseconds_t;
#endif

请提供验证的bsp和config (provide the config and bsp)

• BSP:

• .config:

• action:
  Tips: stm32cubeMX 的gcc编译仍然不如mdk编译优化的好; 还得额外修改启动文件 的 " bl main-->bl entry" 和在board.c的void rt_hw_board_init(void)加入 uart_init(); 才能正常使用. 建议可以跟st那边交涉优化一下这两个地方.
  ]

当前拉取/合并请求的状态 Intent for your PR

必须选择一项 Choose one (Mandatory):

• 本拉取/合并请求是一个草稿版本 This PR is for a code-review and is intended to get feedback
• 本拉取/合并请求是一个成熟版本 This PR is mature, and ready to be integrated into the repo

代码质量 Code Quality：

我在这个拉取/合并请求中已经考虑了 As part of this pull request, I've considered the following:

• [√ ] 已经仔细查看过代码改动的对比 Already check the difference between PR and old code
• [ √] 代码风格正确，包括缩进空格，命名及其他风格 Style guide is adhered to, including spacing, naming and other styles
• [ √] 没有垃圾代码，代码尽量精简，不包含#if 0代码，不包含已经被注释了的代码 All redundant code is removed and cleaned up
• [ √] 所有变更均有原因及合理的，并且不会影响到其他软件组件代码或BSP All modifications are justified and not affect other components or BSP
• [ √] 对难懂代码均提供对应的注释 I've commented appropriately where code is tricky
• [ √] 代码是高质量的 Code in this PR is of high quality
• 已经使用formatting 等源码格式化工具确保格式符合RT-Thread代码规范 This PR complies with RT-Thread code specification
• 如果是新增bsp, 已经添加ci检查到.github/workflows/bsp_buildings.yml 详细请参考链接BSP自查

[CLAassistant]

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_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[github-actions]

📌 Code Review Assignment

🏷️ Tag: libc

Path: components/libc
Reviewers: @mysterywolf

Changed Files (Click to expand)

• components/libc/compilers/common/include/sys/time.h

---

📊 Current Review Status (Last Updated: 2025-05-29 08:39 UTC)

• ⌛ @mysterywolf Pending Review

---

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   Comment LGTM/lgtm after confirming approval

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[kurisaW]

@Atul-8 注意一下CI报错信息