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[BLFS] libxcb-1.10: ImportError: No module named _elementtree.

Hi everyone.

I want to install XFCE on my LFS 7.5 system (following the BLFS book's instructions) but there's this error when I'm trying to compile libxcb (which is necessary for XORG):

Quote:

Installation:
Prefix..............: /usr

Making all in src
make[1]: Entering directory '/sources/xc/libxcb-1.10/src'
/usr/bin/python ./c_client.py -p /usr/lib/python2.7/site-packages /usr/share/xcb/xproto.xml
Traceback (most recent call last):
File "./c_client.py", line 2, in <module>
from xml.etree.cElementTree import *
File "/usr/lib/python2.7/xml/etree/cElementTree.py", line 3, in <module>
from _elementtree import *
ImportError: No module named _elementtree
Makefile:1282: recipe for target 'xproto.c' failed
make[1]: *** [xproto.c] Error 1
make[1]: Leaving directory '/sources/xc/libxcb-1.10/src'
Makefile:574: recipe for target 'all-recursive' failed
make: *** [all-recursive] Error 1

It (obviously) seems to be an error with some Python module... And I can't see where the problem is since I've installed Python 2.7.8 (and libxml2-2.9.1, which is recommended by the book) following the BLFS book's instructions to the letter.

Before you ask: yes, I've already tried with Python 3.4.1 (without "--with-system-expat" option during its installation) and It seemed to work... until there's another python-module error installing MesaLib-10.2.2. :cry:

So, basically I'm stuck. Hope you can help me this time! :p

Regards from Venezuela (excuse my bad english).

Libxcb requires libXau, xcb-proto, and libXdmcp, not Python packages.

Xcb-proto requires Python 2 or 3, and I'd advise you to use Python 3 and use expat as it's a recommended package. Even though recommended patches aren't required, they are recommended because they resolve a possible needed co-dependency needed by another package.

I'm running into the same problem...tried both Python 2 & 3, and neither work. Python 3 returns a different error:

Code:

/usr/bin/python ./c_client.py -p /usr/lib/python2.7/site-packages /usr/share/xcb/xproto.xml

Traceback (most recent call last):

  File "/usr/lib/python3.4/xml/etree/ElementTree.py", line 1459, in __init__

    from xml.parsers import expat

  File "/usr/lib/python3.4/xml/parsers/expat.py", line 4, in <module>

    from pyexpat import *

ImportError: No module named 'pyexpat'



During handling of the above exception, another exception occurred:



Traceback (most recent call last):

  File "/usr/lib/python3.4/xml/etree/ElementTree.py", line 1462, in __init__

    import pyexpat as expat

ImportError: No module named 'pyexpat'



During handling of the above exception, another exception occurred:



Traceback (most recent call last):

  File "./c_client.py", line 3004, in <module>

    module = Module(args[0], output)

  File "/usr/lib/python2.7/site-packages/xcbgen/state.py", line 64, in __init__

    self.namespace = Namespace(filename)

  File "/usr/lib/python2.7/site-packages/xcbgen/state.py", line 32, in __init__

    self.root = parse(filename).getroot()

  File "/usr/lib/python3.4/xml/etree/ElementTree.py", line 1187, in parse

    tree.parse(source, parser)

  File "/usr/lib/python3.4/xml/etree/ElementTree.py", line 592, in parse

    parser = XMLParser()

  File "/usr/lib/python3.4/xml/etree/ElementTree.py", line 1465, in __init__

    "No module named expat; use SimpleXMLTreeBuilder instead"

ImportError: No module named expat; use SimpleXMLTreeBuilder instead

Makefile:1282: recipe for target 'xproto.c' failed

make[1]: *** [xproto.c] Error 1

make[1]: Leaving directory '/home/salfter/xc/libxcb-1.10/src'

Makefile:574: recipe for target 'all-recursive' failed

make: *** [all-recursive] Error 1

I built it according to the directions here, and changed the /usr/bin/python symlink to use it.

Quote:

Originally Posted by salfter (Post 5207914)

I'm running into the same problem...tried both Python 2 & 3, and neither work.

Trying again after rebuilding expat & python3...so far, so good.

Update: Build succeeded.