esp8266/Arduino

Functions / symbols defined in sketch may override framework .a

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#8,710 创建于 2022年11月6日

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 (2 评论) (0 反应) (0 负责人)C++ (15,728 star) (13,342 fork)batch import
component: corehelp wanted

描述

I tested the MCVE and OTA works again perfectly fine. I found the problem in my full sketch. I had a global object called crc32! The same name as the function name with problem. Sorry for bothering you and thank you @earlephilhower for your help. Closing this issue...

Originally posted by @kamran00f in https://github.com/esp8266/Arduino/issues/7651#issuecomment-707327428

贡献者指南

技术栈
cpp
领域
tooling
议题类型
bug
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
1-3 hours
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
stale
清晰度议题是否清楚说明期望改动、验收标准和下一步。
mostly clear
前置要求
basic C++ knowledgeArduino IDE familiarityESP8266 sketch structure
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
30
研究方向
Investigate how the ESP8266 Arduino core's build system handles symbol conflicts between user sketches and precompiled libraries (.a files). The issue mentions a global variable named 'crc32' overriding a framework function; examine the linking order and possible use of weak symbols. Look at the core's platform.txt or linker scripts to understand how symbols are resolved, and check if there is a need to prevent user symbols from overriding internal ones (e.g., using C++ namespaces or prefixing). Refer to the issue comment at https://github.com/esp8266/Arduino/issues/7651#issuecomment 707327428 for the user's self resolution.