esp8266/Arduino

Functions / symbols defined in sketch may override framework .a

Open

#8,710 建立於 2022年11月6日

在 GitHub 查看
 (2 留言) (0 反應) (0 負責人)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

貢獻者指南

技術棧
cpp
領域
tooling
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
1-3 hours
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
mostly clear
前置要求
basic C++ knowledgeArduino IDE familiarityESP8266 sketch structure
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
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.