CODEWITHSUNDEEP
c++qtg++qt-creatorcompiler-optimization
batista cori
batista cori

Reputation: 545

Configuration for optimizing QtCreator compiler

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?

Upvotes: 16

Views: 20510

Answers (2)

Mevin Babu
Mevin Babu

Reputation: 2475

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

Upvotes: 0

NG_
NG_

Reputation: 7181

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

Upvotes: 20

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