Public bug reported:
I wanted to install the Python program
https://github.com/wikimedia/ifttt
Its setup script has "pip install -r requirements.txt", so running `./setup`
gives
pip: command not found
OK, so I run `sudo apt-get install python-pip`, and Ubuntu installs pip
(yay!).
Now retry `./setup` and it runs pip, but I get some " ERROR: /bin/sh: 1:
xslt-config: not found" from which it continues, and then a " fatal
error: pyconfig.h: No such file or directory". (more output below).
If you google this last error you find dozens reports of this problem
installing a variety of packages. The fix is to install python-dev. But
automation is *failing users* here. pip install should determine that
some package requires the dev header files and realize that they're not
around.
If you still have the output from `sudo apt-get install python-pip` around, a
hint is there:
Recommended packages:
python-dev-all
(but this package doesn't exist! I'll file a separate bug)
And if you are knowledgeable enough to change the pip install line to `pip
install --no-clean -r requirements.txt` you will find in INSTALL.txt, in the
downloaded source for lxml in the temporary build directory, the comment:
To install the required development packages of these dependencies
on Linux systems, use your distribution specific installation tool,
e.g. apt-get on Debian/Ubuntu::
sudo apt-get install libxml2-dev libxslt-dev python-dev
The pip automation needs to do the right thing here instead of blowing up and
making user after user google for the fix. (I realize this is easier said than
done.)
Thanks!
--- console output ---
...
Downloading/unpacking lxml==3.4.2 (from -r requirements.txt (line 4))
...
ERROR: /bin/sh: 1: xslt-config: not found
** make sure the development packages of libxml2 and libxslt are installed
**
Using build configuration of libxslt
...
Running setup.py install for lxml
/usr/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution
option: 'bugtrack_url'
warnings.warn(msg)
Building lxml version 3.4.2.
Building without Cython.
ERROR: /bin/sh: 1: xslt-config: not found
** make sure the development packages of libxml2 and libxslt are installed
**
Using build configuration of libxslt
building 'lxml.etree' extension
x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall
-Wstrict-prototypes -fno-strict-aliasing -D_FORTIFY_SOURCE=2 -g
-fstack-protector-strong -Wformat -Werror=format-security -fPIC
-I/tmp/pip-build-Pfd52d/lxml/src/lxml/includes -I/usr/include/python2.7 -c
src/lxml/lxml.etree.c -o build/temp.linux-x86_64-2.7/src/lxml/lxml.etree.o -w
src/lxml/lxml.etree.c:8:22: fatal error: pyconfig.h: No such file or
directory
#include "pyconfig.h"
ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: python-pip 1.5.6-5ubuntu2
ProcVersionSignature: Ubuntu 3.19.0-28.30-generic 3.19.8-ckt5
Uname: Linux 3.19.0-28-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.4
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Sep 14 14:05:07 2015
InstallationDate: Installed on 2015-03-30 (167 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
PackageArchitecture: all
SourcePackage: python-pip
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: python-pip (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug vivid
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https://bugs.launchpad.net/bugs/1495705
Title:
pip installs can have unmet dependency on python-dev
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