STINNER Victor added the comment:

Oh wait, I expected that "make test" would build Python with PGO, but it 
doesn't anymore. Would it be possible to change the Makefile to make sure that 
"make python" (on Linux, "make python.exe" on macOS) would build Python using 
PGO?

I tried to hack something, but I'm lost in dependencies... "make profile-opt" 
runs "$(MAKE) build_all_generate_profile" which runs "$(MAKE) build_all 
CFLAGS_NODIST=..." and build_all depends on "$(BUILDPYTHON)".

I'm not sure that it's possible to make everything automatic because of the 
high number of targets and dependencies.

To be honest, I'm not excited by ./configure --enable-optimizations. I was 
happy with an explicit "make profile-opt".

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue29243>
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