07月29, 2018

Code::Blocks 17.12关于开启Optimization的问题

codeblocks17.12的BUG真的多,刚刚遇到一个开启O3优化不其作用的问题,原因是我看到了图中1处又个O3,我就给开启了。

alt

结果发现根本没有优化。

仔细观察编译log之后发现:

这是1的:

-------------- Build file: "no target" in "no project" (compiler: unknown)---------------

mingw32-g++.exe   -c C:\Users\fz\Desktop\A.cpp -o C:\Users\fz\Desktop\A.o
mingw32-g++.exe  -o C:\Users\fz\Desktop\A.exe C:\Users\fz\Desktop\A.o  -O3  
Process terminated with status 0 (0 minute(s), 0 second(s))
0 error(s), 0 warning(s) (0 minute(s), 0 second(s))

Checking for existence: C:\Users\fz\Desktop\A.exe
Executing: '"C:\Program Files (x86)\CodeBlocks/cb_console_runner.exe" "C:\Users\fz\Desktop\A.exe"' (in 'C:\Users\fz\Desktop')

这是2的:

-------------- Build file: "no target" in "no project" (compiler: unknown)---------------

mingw32-g++.exe -O3  -c C:\Users\fz\Desktop\A.cpp -o C:\Users\fz\Desktop\A.o
mingw32-g++.exe  -o C:\Users\fz\Desktop\A.exe C:\Users\fz\Desktop\A.o   
Process terminated with status 0 (0 minute(s), 0 second(s))
0 error(s), 0 warning(s) (0 minute(s), 0 second(s))

Checking for existence: C:\Users\fz\Desktop\A.exe
Executing: '"C:\Program Files (x86)\CodeBlocks/cb_console_runner.exe" "C:\Users\fz\Desktop\A.exe"' (in 'C:\Users\fz\Desktop')

观察后发现1是对链接过程进行O3,那自然是没有什么作用的了!

本文链接:https://debug.fanzheng.org/post/bug-in-codeblocks-about-optimization.html

-- EOF --

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