C 有哪些有用的 GCC 标志? [英] What are the useful GCC flags for C?

问题描述

除了设置 -Wall 和设置 -std=XXX 之外，还有哪些其他真正有用但鲜为人知的编译器标志可用于 C 中?

Beyond setting -Wall, and setting -std=XXX, what other really useful, but less known compiler flags are there for use in C?

我对任何其他警告和/或在某些情况下将警告转化为错误特别感兴趣，以绝对减少任何意外的类型不匹配.

I'm particularly interested in any additional warnings, and/or and turning warnings into errors in some cases to absolutely minimize any accidental type mismatches.

推荐答案

几个 -f 代码生成选项很有趣:

Several of the -f code generation options are interesting:

• -fverbose-asm 如果您使用 -S 进行编译以检查程序集输出，则非常有用 - 它添加了一些信息性注释.

• -fverbose-asm is useful if you're compiling with -S to examine the assembly output - it adds some informative comments.

-finstrument-functions 添加代码以在每个函数入口和出口点调用用户提供的分析函数.

-finstrument-functions adds code to call user-supplied profiling functions at every function entry and exit point.

--coverage 检测程序中的分支和调用并创建覆盖注释文件，以便在程序运行时生成覆盖数据，该数据可以由 gcov 帮助分析测试覆盖率的程序.

--coverage instruments the branches and calls in the program and creates a coverage notes file, so that when the program is run coverage data is produced that can be formatted by the gcov program to help analysing test coverage.

-fsanitize={address,thread,undefined} 分别启用 AddressSanitizer、ThreadSanitizer 和 UndefinedBehaviorSanitizer 代码清理器.这些检测程序在运行时检查各种错误.

-fsanitize={address,thread,undefined} enables the AddressSanitizer, ThreadSanitizer and UndefinedBehaviorSanitizer code sanitizers respectively. These instrument the program to check for various sorts of errors at runtime.

以前这个答案也提到了 -ftrapv，但是这个功能已经被 -fsanitize=signed-integer-overflow 取代，它是 -fsanitize=undefined.

Previously this answer also mentioned -ftrapv, however this functionality has been superseded by -fsanitize=signed-integer-overflow which is one of the sanitizers enabled by -fsanitize=undefined.

这篇关于C 有哪些有用的 GCC 标志?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！