chore: Update compiler flags for security enhancements

[wangrong1069]

As title

Log: Update compiler flags for security enhancements
Bug: https://pms.uniontech.com/bug-view-337059.html

Summary by Sourcery

Build:

• Adjust Debian build rules to apply strengthened compiler security flags.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

This PR updates Debian packaging build rules to adjust compiler flags for improved security hardening during builds.

File-Level Changes

Change	Details	Files
Adjust compiler and/or linker flags in Debian packaging rules to strengthen security hardening of produced binaries.	Modify the debian/rules build configuration to inject additional security-related compiler flags (e.g., stack protection, FORTIFY_SOURCE, RELRO/PIE) or tighten existing ones. Ensure the updated flags are applied during package build steps driven by debian/rules so resulting binaries follow the new security policy.	debian/rules

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[sourcery-ai]

Hey there - I've reviewed your changes and they look great!

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[deepin-ci-robot]

deepin pr auto review

我来对这个 diff 进行审查：

1. 语法逻辑：

• 语法是正确的，符合 debian/rules 文件的格式要求
• export DEB_LDFLAGS_APPEND = -Wl,-z,now 的写法是正确的，用于设置链接器标志

2. 代码质量：

• 这个修改是合理的，增加了 -Wl,-z,now 标志
• 修改位置恰当，放在了其他环境变量设置之后，%: 规则之前

3. 代码性能：

• -z,now 标志会使链接器在程序启动时就解析所有动态符号，而不是延迟解析
• 这可能会略微增加程序启动时间，但可以提高运行时性能，因为不需要在运行时进行符号解析
• 这是一个合理的权衡，特别是对于安全敏感的应用

4. 代码安全：

• 这个修改提高了安全性
• -z,now 标志可以防止某些类型的攻击，如 GOT（Global Offset Table）覆写攻击
• 它确保所有符号解析在程序启动时完成，而不是延迟到运行时，这可以减少某些安全漏洞的利用可能性

改进建议：

1. 考虑添加 -Wl,-z,relro 标志，它与 -z,now 配合使用可以提供更好的保护：

   export DEB_LDFLAGS_APPEND = -Wl,-z,now -Wl,-z,relro
   

   -z,relro 会让链接器设置部分 GOT 为只读，进一步增加安全性。

2. 如果这个包特别关注安全性，还可以考虑添加其他安全相关的链接器标志，如：

   export DEB_LDFLAGS_APPEND = -Wl,-z,now -Wl,-z,relro -Wl,-z,noexecstack -Wl,-z,nodlopen
   

3. 建议在修改上方添加注释，说明为什么需要这些标志：

   # Security hardening flags
   export DEB_LDFLAGS_APPEND = -Wl,-z,now
   

总的来说，这是一个好的修改，提高了安全性，只需要考虑是否要添加更多的安全标志来进一步增强安全性。

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: lzwind, wangrong1069

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• debian/deepin/OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[wangrong1069]

/merge