Building Python3.6.2 with optimizations

[madtom1999]

If I try configuring python3.6.2 with --enable-optimisations and this causes it to segfault gcc during make.
It seems to build OK with a plain ./configure and make.
The error recommends a full bug report - has anyone also had this?

[asavah]

It's very hard to provide help without seeing the actual error you are getting.

Entering crystall ball mode...

--enable-optimizations for python build enables lto and profiling, it also runs a set of lenghty and expensive tests, lto linking requires vast amounts of ram.
It's possible that gcc segfaults due to OOM (out of memory).

Run dmesg after crash - if you see OOM errors then my crystal ball still works.

Try increasing your swap{file,partition} to 4-8 GB.

[nmstoker]

It's a little while after the earlier posts, but in case it's useful to anyone trying something similar, I managed to successfully compile Python 3.6 (specifically 3.6.4)

My set up is a RPi 3 running Rasbian Jessie Lite

I did the following steps, based on the URL given but for 3.6.4 with the optimisations and LTO enabled (wasn't 100% sure that LTO did anything as I didn't spot any output referring to it, but it didn't seem to do any harm!).

https://liftcodeplay.com/2017/06/30/how ... pberry-pi/

Pre-requisites

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sudo apt-get install build-essential checkinstall
sudo apt-get install libreadline-gplv2-dev libncursesw5-dev libssl-dev libsqlite3-dev tk-dev libgdbm-dev libc6-dev libbz2-dev

Get source

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cd /usr/src
sudo wget https://www.python.org/ftp/python/3.6.4/Python-3.6.4.tgz
sudo tar xzf Python-3.6.4.tgz

Compile

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cd Python-3.6.4
sudo -s
./configure --enable-optimizations --with-lto
make altinstall
exit

Test version

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python3.6 --version
pip3.6 --version

[madtom1999]

Ooh Thanks
Tom