剖析 C++ 编译过程

Profiling the C++ compilation process(剖析 C++ 编译过程)

问题描述

我倾向于编写相当大的模板化头文件 C++ 库，我的用户通常会抱怨编译时间.想了想之后，我突然想到我不知道时间都去哪儿了.是否有一些简单的方法可以使用通用编译器(例如 g++、icc 和 xlC)来分析 C++ 编译过程?例如，是否有可能了解在 C++ 编译的每个阶段中花费了多少时间??

I tend to write rather large templated header-only C++ libraries and my users commonly complain about compilation times. After thinking about the matter, it occurred to me that I have no idea where the time is going. Is there some simple way to profile the C++ compilation process with common compilers, such as g++, icc, and xlC? For instance, is it possible to get an idea of how much time is spent within each of the phases of C++ compilation?

推荐答案

对于 GCC 有 调试选项 以查找在 C++ 编译的每个阶段花费了多少时间?

-Q使编译器在编译时打印出每个函数名称，并在完成时打印有关每次传递的一些统计信息.

-Q Makes the compiler print out each function name as it is compiled, and print some statistics about each pass when it finishes.

-ftime-report使编译器在完成时打印一些有关每次传递所消耗的时间的统计信息.

-ftime-report Makes the compiler print some statistics about the time consumed by each pass when it finishes.

通行证在GCCINT 9:编译器的通行证和文件中进行了描述.

Passes are described in GCCINT 9: Passes and Files of the Compiler.

您可以在此处使用 -v -ftime-report 将单个源文件的 g++ 编译输出发布到 讨论它.GCC 邮件列表上可能有一些帮助.

You can post output of g++ compilation of single source file with -v -ftime-report here to discuss it. There could be some help on the GCC mailing list.

对于GCC 以外的编译器(或 GCC 比/gcc/Debugging-Options.html">3.3.6) 查看此线程中的其他选项.