python,linux,django,gcc,pip , Django MySQLClient pip compile failure on Linux


Django MySQLClient pip compile failure on Linux

Question:

Tag: python,linux,django,gcc,pip

Django documentation as of v1.8 recommends using mysqlclient connector for the framework. I'm attempting to pip install the package on Ubuntu 14.04 with Python 3.4 and running into a GCC error that I'm unable to find reference to. I'm not an expert on compiling software, so was hoping somebody can see the solution.

I believe I'm getting a linking error. I have installed distro specific mysql headers, but it looked like they were only applicable to Python 2.7.x.

Not sure how much of this is useful so apologies for the long paste, but here's the error log:

Using version 1.3.6 (newest of versions: 1.3.6, 1.3.5, 1.3.4, 1.3.3, 1.3.2, 1.3.1, 1.3.0)
Downloading from URL https://pypi.python.org/packages/source/m/mysqlclient/mysqlclient-1.3.6.tar.gz#md5=58d7c9c617a4286a88db290e7857d3aa (from https://pypi.python.org/simple/mysqlclient/)
Running setup.py (path:/tmp/pycharm-packaging4.tmp/mysqlclient/setup.py) egg_info for package mysqlclient
running egg_info
creating pip-egg-info/mysqlclient.egg-info
writing dependency_links to pip-egg-info/mysqlclient.egg-info/dependency_links.txt
writing top-level names to pip-egg-info/mysqlclient.egg-info/top_level.txt
writing pip-egg-info/mysqlclient.egg-info/PKG-INFO
writing manifest file 'pip-egg-info/mysqlclient.egg-info/SOURCES.txt'
warning: manifest_maker: standard file '-c' not found

reading manifest file 'pip-egg-info/mysqlclient.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
writing manifest file 'pip-egg-info/mysqlclient.egg-info/SOURCES.txt'
Source in /tmp/pycharm-packaging4.tmp/mysqlclient has version 1.3.6, which satisfies requirement mysqlclient
Installing collected packages: mysqlclient
Running setup.py install for mysqlclient
Running command /home/tim/BingVEnv/bin/python -c "import setuptools, tokenize;__file__='/tmp/pycharm-packaging4.tmp/mysqlclient/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-4bp9npvl-record/install-record.txt --single-version-externally-managed --compile --install-headers /home/tim/BingVEnv/include/site/python3.4
running install
running build
running build_py
creating build
creating build/lib.linux-x86_64-3.4
copying _mysql_exceptions.py -> build/lib.linux-x86_64-3.4
creating build/lib.linux-x86_64-3.4/MySQLdb
copying MySQLdb/__init__.py -> build/lib.linux-x86_64-3.4/MySQLdb
copying MySQLdb/compat.py -> build/lib.linux-x86_64-3.4/MySQLdb
copying MySQLdb/converters.py -> build/lib.linux-x86_64-3.4/MySQLdb
copying MySQLdb/connections.py -> build/lib.linux-x86_64-3.4/MySQLdb
copying MySQLdb/cursors.py -> build/lib.linux-x86_64-3.4/MySQLdb
copying MySQLdb/release.py -> build/lib.linux-x86_64-3.4/MySQLdb
copying MySQLdb/times.py -> build/lib.linux-x86_64-3.4/MySQLdb
creating build/lib.linux-x86_64-3.4/MySQLdb/constants
copying MySQLdb/constants/__init__.py -> build/lib.linux-x86_64-3.4/MySQLdb/constants
copying MySQLdb/constants/CR.py -> build/lib.linux-x86_64-3.4/MySQLdb/constants
copying MySQLdb/constants/FIELD_TYPE.py -> build/lib.linux-x86_64-3.4/MySQLdb/constants
copying MySQLdb/constants/ER.py -> build/lib.linux-x86_64-3.4/MySQLdb/constants
copying MySQLdb/constants/FLAG.py -> build/lib.linux-x86_64-3.4/MySQLdb/constants
copying MySQLdb/constants/REFRESH.py -> build/lib.linux-x86_64-3.4/MySQLdb/constants
copying MySQLdb/constants/CLIENT.py -> build/lib.linux-x86_64-3.4/MySQLdb/constants
running build_ext
building '_mysql' extension
creating build/temp.linux-x86_64-3.4
x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector-strong -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -fPIC -Dversion_info=(1,3,6,'final',1) -D__version__=1.3.6 -I/usr/include/mysql -I/home/tim/BingVEnv/include -I/usr/include/python3.4m -c _mysql.c -o build/temp.linux-x86_64-3.4/_mysql.o -fPIC -g -fabi-version=2 -fno-omit-frame-pointer -fno-strict-aliasing
x86_64-linux-gnu-gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-Bsymbolic-functions -Wl,-z,relro -g -fstack-protector-strong -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 build/temp.linux-x86_64-3.4/_mysql.o -lmysqlclient -lpthread -lz -lm -ldl -o build/lib.linux-x86_64-3.4/_mysql.cpython-34m.so
/usr/bin/ld: cannot find -lz
collect2: error: ld returned 1 exit status
error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
Complete output from command /home/tim/BingVEnv/bin/python -c "import setuptools, tokenize;__file__='/tmp/pycharm-packaging4.tmp/mysqlclient/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-4bp9npvl-record/install-record.txt --single-version-externally-managed --compile --install-headers /home/tim/BingVEnv/include/site/python3.4:
running install

running build

running build_py

creating build

creating build/lib.linux-x86_64-3.4

copying _mysql_exceptions.py -> build/lib.linux-x86_64-3.4

creating build/lib.linux-x86_64-3.4/MySQLdb

copying MySQLdb/__init__.py -> build/lib.linux-x86_64-3.4/MySQLdb

copying MySQLdb/compat.py -> build/lib.linux-x86_64-3.4/MySQLdb

copying MySQLdb/converters.py -> build/lib.linux-x86_64-3.4/MySQLdb

copying MySQLdb/connections.py -> build/lib.linux-x86_64-3.4/MySQLdb

copying MySQLdb/cursors.py -> build/lib.linux-x86_64-3.4/MySQLdb

copying MySQLdb/release.py -> build/lib.linux-x86_64-3.4/MySQLdb

copying MySQLdb/times.py -> build/lib.linux-x86_64-3.4/MySQLdb

creating build/lib.linux-x86_64-3.4/MySQLdb/constants

copying MySQLdb/constants/__init__.py -> build/lib.linux-x86_64-3.4/MySQLdb/constants

copying MySQLdb/constants/CR.py -> build/lib.linux-x86_64-3.4/MySQLdb/constants

copying MySQLdb/constants/FIELD_TYPE.py -> build/lib.linux-x86_64-3.4/MySQLdb/constants

copying MySQLdb/constants/ER.py -> build/lib.linux-x86_64-3.4/MySQLdb/constants

copying MySQLdb/constants/FLAG.py -> build/lib.linux-x86_64-3.4/MySQLdb/constants

copying MySQLdb/constants/REFRESH.py -> build/lib.linux-x86_64-3.4/MySQLdb/constants

copying MySQLdb/constants/CLIENT.py -> build/lib.linux-x86_64-3.4/MySQLdb/constants

running build_ext

building '_mysql' extension

creating build/temp.linux-x86_64-3.4

x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector-strong -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -fPIC -Dversion_info=(1,3,6,'final',1) -D__version__=1.3.6 -I/usr/include/mysql -I/home/tim/BingVEnv/include -I/usr/include/python3.4m -c _mysql.c -o build/temp.linux-x86_64-3.4/_mysql.o -fPIC -g -fabi-version=2 -fno-omit-frame-pointer -fno-strict-aliasing

x86_64-linux-gnu-gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-Bsymbolic-functions -Wl,-z,relro -g -fstack-protector-strong -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 build/temp.linux-x86_64-3.4/_mysql.o -lmysqlclient -lpthread -lz -lm -ldl -o build/lib.linux-x86_64-3.4/_mysql.cpython-34m.so

/usr/bin/ld: cannot find -lz

collect2: error: ld returned 1 exit status

error: command 'x86_64-linux-gnu-gcc' failed with exit status 1

Answer:

It looks like you're missing zlib; you'll want to install it: apt-get install zlib1g-dev

I also suggest reading over the README and confirming you have all other dependencies met: https://github.com/dccmx/mysqldb/blob/master/README

Also, I suggest using mysqlclient over MySQLdb as its a fork of MySQLdb and what Django recommends.


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I need to use a particular libc to run a tool (cp). The problem is that this tool has to be used as argument of another tool (for example timeout) and I don't want to use the modified libc with this one. I tried to do: timeout 10 LD_LIBRARY_PATH=/path/to/mod/libc/ cp...

How does the class_weight parameter in scikit-learn work?


python,scikit-learn
I am having a lot of trouble understanding how the class_weight parameter in scikit-learn's Logistic Regression operates. The Situation I want to use logistic regression to do binary classification on a very unbalanced data set. The classes are labelled 0 (negative) and 1 (positive) and the observed data is in...

SQLAlchemy. 2 different relationships for 1 column


python,sqlalchemy
I have a simple many-to-many relationship with associated table: with following data: matches: users: users_mathces: ONE user can play MANY matches and ONE match can involve up to TWO users I want to realize proper relationships in both "Match" and "User" classes users_matches_table = Table('users_matches', Base.metadata, Column('match_id', Integer, ForeignKey('matches.id', onupdate="CASCADE",...

Twilio Client Python not Working in IOS Browser


javascript,python,ios,flask,twilio
I have created a simple twilio client application to make phone calls from Web Browser to phones. I used a sample Flask app to generate a secure Capability Token and used twilio.min.js library to handle calls from my HTML. The functionality works fine in Computer Browsers ans Android Phone Browsers,...