Default dlopenflags inconsistent between Linux and macOS
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描述
Feature or enhancement
Proposal:
The default dlopen flags for loading extension modules specify neither RTLD_GLOBAL nor RTLD_LOCAL.
Unfortunately, the behavior when neither flag is specified differs between Linux and macOS: on Linux, RTLD_LOCAL is the default, while on macOS RTLD_GLOBAL seems to be the default.
POSIX itself is not helpful on the matter: "If neither RTLD_GLOBAL nor RTLD_LOCAL is specified, the default behavior is unspecified".
Having two different behaviors on two extremely popular platforms may make support more difficult for maintainers of complex extension modules that bundle popular third-party C/C++ libraries (here is a possible instance).
Has this already been discussed elsewhere?
No response given
Links to previous discussion of this feature:
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调研方向
从 CPython 的扩展模块加载路径以及 Linux、macOS 和 POSIX 的相关 dlopen 规范入手。确定预期的显式默认行为,然后验证扩展加载在两个平台上是否一致,并确认相关的现有覆盖仍然通过。
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评估
- 技术栈
- c, python
- 领域
- operating-systems
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- 功能
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- 4/5
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- 3-5 天
- 活跃度
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- 基本清楚
- 新手友好度
- 35/100