How to make profile-guided optimizations in Qtcreator ?

[RahibeMeryem]

Hi,

how I can use profile-guided optimizations in Qtcreator ? what is the proper xxx.pro flags?

This is general usage :

g++ -O3 -fprofile-generate [more params here, like -march=native ...] -o executable_name
// run my program's benchmarks, or something to stress its most common path
g++ -O3 -fprofile-use [more params here, like -march=native...] -o executable_name

first its producing profile-generate . thand second compile using it