I'm trying to build Python-3.7.4 from release tarball.

Configure line: ./configure --prefix=/opt/python-3.7.4 --disable-shared  --enable-optimizations

System: Ubuntu 18.04.2 amd64, 4.15.0-54-generic #58-Ubuntu SMP

Build fails.

Sorry you are having problems.  Suggest first trying a clean build without --enable-optimizations.  If that works, please supply the output from:

./python -m test.pythoninfo

And, if the unoptimized build succeeds, also try running the tests with it:

make test

test.pythoninfo output

make test output from unoptimized build with --disable-shared --prefix=/opt/python-3.7.4

Thanks for the additional info.  I see two issues here.  One, you are building with OpenSSL 1.1.1, the initial release back in 2018-09.  There have been a few releases since then (currently at 1.1.1c) which do fix problems.  You should try to upgrade it.

Second, and more importantly, is that "make run_profile_task" hangs because a test hangs up and the tests are being run sequentially (i.e. without regrtest -j options meaning tests all run in one process sequentially).  These days nearly all our testing using -j because of the possibility of individual tests failures and residual effects between tests. And note that "make test", which runs in parallel, did complete. I see there is some discussion going on Issue36044 about changing the set of tests run_profile_task uses which would likely mitigate problems like this.  I'm CCing gps here for his views.

It also appears Issue33467 is a similar report.  I'm going to close it as a duplicate of this one.

While test hangs shouldn't happen, I recommend working around such odd situations you are finding on your system by supplying your own modified PROFILE_TASK setting at make time that avoids whatever test(s) are causing you problems.  The linked to issue36044 contains some suggested PROFILE_TASK settings.

Thank you for the information.

The build system is standard Ubuntu 18.04.2 and openssl is system provided. I will try to build Python against other openssl versions, as well against libressl.

Jerek, is there anything more you are expecting us to do for this issue?  The only thing I can think of at the moment might be to add something to the "Profile Guided Optimization" section of the top-level README.rst to include @gps's suggestions for tailoring PROFILE_TASK.

Not really. I tried with limited test list and I keep getting the exact same failure in test_logging, moreover build passes all tests on all other machines we have. I guess this is some weird isolated issue not related to Python at all so I'm closing it as "not a bug". Thank you for your help.