BLFS 8.3

jr_bob_dobbs · 11-24-2018, 02:34 PM

So I decided to rebuild Python 3 for my blfs system. It was compiled in during the LFS phase, but the blfs book says "Python 3 was installed in LFS. The only reason to rebuild it here is if optional modules are needed." so I thought i would rebuild it.

Naturally there were problems.

Problem one. The book says to, after install, do this:

Code:

ln -svfn python-3.7.0 /usr/share/doc/python-3

There is no such directory. I double checked a few things because I use a destdir install method and ... nope. Docs are not being built.

I don't care about docs not being there, but the apparent descrepency between what is in the book and what is in front of me is worriesome.

Problem two. The BLFS rebuild of python 3 is smaller than the LFS python 3. Specifcally, the package tarball of the newer one is smaller. If extra optional modules were being built, would not the newer one be larger?

I unzipped both packages (the LFS python 3 and the BLFS python 3) and ran diff. Ignoring differences and focusing only one files present one one and not the other reveals:

Code:

Only in old/usr/bin: easy_install-3.7
Only in old/usr/bin: pip3
Only in old/usr/bin: pip3.7
Only in new/usr/lib/python3.7/lib-dynload: _sqlite3.cpython-37m-x86_64-linux-gnu.so
Only in old/usr/lib/python3.7/site-packages: easy_install.py
Only in old/usr/lib/python3.7/site-packages: pip
Only in old/usr/lib/python3.7/site-packages: pip-10.0.1.dist-info
Only in old/usr/lib/python3.7/site-packages: pkg_resources
Only in old/usr/lib/python3.7/site-packages: __pycache__
Only in old/usr/lib/python3.7/site-packages: setuptools
Only in old/usr/lib/python3.7/site-packages: setuptools-39.0.1.dist-info

So why is pip3, easy_install and the others listed, only be compiled in LFS and not in BLFS?

spiky0011 · 11-24-2018, 03:37 PM

Did you build the docs in LFS??? If not then it wont be there.
It is optional

jr_bob_dobbs · 11-24-2018, 04:44 PM

Quote:

Originally Posted by spiky0011

Did you build the docs in LFS??? If not then it wont be there.
It is optional

Oh wow, the LFS book mentions the option of building the docs but the BLFS does not. Odd, or at least counter-intuitive. Thanks for the information.

Now I just have to figure out why the second python 3 install isn't putting pip3 and those other things in. That is a train wreck waiting to happen if I were to actually install it.

spiky0011 · 11-24-2018, 05:22 PM

FYI
pip -V =pip 9.0.3 from /usr/lib/python2.7/site-packages (python 2.7)

pip3 -V = pip 10.0.1 from /usr/lib/python3.7/site-packages/pip (python 3.7)

Dont know why the dir name changed in python3,
but pip3 would work if you used it.

jr_bob_dobbs · 11-25-2018, 07:58 AM

Quote:

Originally Posted by spiky0011

FYI
pip -V =pip 9.0.3 from /usr/lib/python2.7/site-packages (python 2.7)

pip3 -V = pip 10.0.1 from /usr/lib/python3.7/site-packages/pip (python 3.7)

Dont know why the dir name changed in python3,
but pip3 would work if you used it.

In your post you compare python 2 and 3. I was not comparing python 2 and 3. I was comparing two builds of the same version of python 3 and questioning in why files were in the first build (made during LFS) that were not in the second build (made during BLFS).