[問題] 不用recompile就可決定是否加debug info

看板C_and_CPP作者phyllispig (不停向前看的生活)時間14年前 (2011/11/18 00:40)推噓1(1推 0噓 12→)

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開發平台(Platform): (Ex: VC++, GCC, Linux, ...) Linux 額外使用到的函數庫(Library Used): (Ex: OpenGL, ...) 問題(Question)：來源：Linux程式設計教學手冊第十章 Debugging 方法：Debugging without Recompiling 描述： Before we move on, it's worth mentioning that there's a way of using the printf function to help with debugging without using the #ifdef DEBUG technique, which requires a program to be recompiled before it can be used. The method is to add a global variable as a debug flag, allow a -d option at the command line, which allows the user to switch debugging on even after the program has been released, and add a debug logging function. Now you can intersperse things like this in the program code: if (debug) { sprintf(msg, ...) write_debug(msg) } 補充說明(Supplement)：一直搞不懂要怎麼用是gcc -o program source_code.c 然後執行時，在命令列加-d要怎麼用呢？我的嘗試如下： (1)在file.c宣告一個全域變數比如 int debug = 0; ... (2)把檔案編譯完成後，下./program -d debug=1 不能使用…不知怎麼用才對，謝謝指教 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 114.34.225.172 ※ 編輯: phyllispig 來自: 114.34.225.172 (11/18 00:42)

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