[CentOS-devel] a question about rpmbuild command

wk 304702903 at qq.com
Wed Dec 4 15:51:32 UTC 2013


Hi,everyone

http://www.redhat.com/archives/shrike-list/2003-April/msg00069.html
http://fedoraproject.org/wiki/StackTraces
http://old-en.opensuse.org/Packaging/Debuginfo


This document said:"passing -g to gcc or g++". And "Note that the default CFLAGS and CXXFLAGS of the distro already contain -g, "


My question is :
I build souce code a.c with myself gcc/make configfile.
first time:      compile a.c with -O2,then get a1.bin
second time: compile a.c woth -O2 -g,then strip debug symbols.then get a2.bin


But i find a2.bin is slower then a1.bin.The performance of a2.bin is 5% slower.


Should a2.bin run as fast as a1.bin?(performance is same?)//Tomorrow i will provide the complete commands.
Can anyone give some advice?


I find that:rpmbuild run gcc one time with -g -O2,then get a.rpm and a.debuginforpm.

thanks.
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