Configuration for optimizing QtCreator compiler
18,534
Solution 1
Try to add next lines to your .pro file:
# remove possible other optimization flags
QMAKE_CXXFLAGS_RELEASE -= -O
QMAKE_CXXFLAGS_RELEASE -= -O1
QMAKE_CXXFLAGS_RELEASE -= -O2
# add the desired -O3 if not present
QMAKE_CXXFLAGS_RELEASE *= -O3
Solution 2
Add these line's to your .pro file if you want a small application size
QMAKE_CXXFLAGS += -Os -mpreferred-stack-boundary=2 -finline-small-functions -momit-leaf-frame-pointer
If you want a faster application , consider using -O2 instead of -Os
refer this for more options
Author by
batista cori
Updated on June 02, 2022Comments
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batista cori about 2 years
I'm using QtCreator in Windows 7.
I want to configure it to use third level optimization (
-O3
) for c++ compiler.How can I do this to speed up my code and what changes are necessary?
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batista cori over 11 yearsI did it. But I can't see any improvement. Maybe I should think about rebuilding Qt with -O3