FYI: Cleanup of debug options
mstahl at redhat.com
Mon Nov 5 09:10:07 PST 2012
On 05/11/12 17:59, Stephan Bergmann wrote:
> On 11/05/2012 05:15 PM, Michael Meeks wrote:
>> Having done a from-clean build, and been unable to debug because my
>> autogen.lastrun contains --enable-symbols - and that now fails to do
>> anything - I did some digging to try to restore that functionality.
>> It appears that prepending:
>> CFLAGS=-Os -g
>> CXXFLAGS=-Os -g
>> to your autogen.lastrun will restore the original --enable-symbols
>> functionality; and of course leaving that option there does no harm if
>> you want to share your autogen.lastrun with older versions.
>> Why do I extensively use that option, though I'm not a packager:
>> * I like to run the code the end-user runs - warts and all.
> Note that what the end user runs is -O2 rather than -Os IIUC.
yes...and no. both are true actually:
>  ms at bastet:/master > git grep -- "-O2" solenv/gbuild/ | wc -l
>  ms at bastet:/master > git grep -- "-Os" solenv/gbuild/ | wc -l
>  ms at bastet:/master > git grep -- "-O " solenv/gbuild/platform/ | wc -l
so if you want to do profiling you simply have to look up which one your
particular architecture uses first to get meaningful numbers.
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