[Python-Dev] PEP 370 extras (original) (raw)

Christian Heimes lists at cheimes.de
Fri May 9 00:05:19 CEST 2008

I'm working on some extra cool and useful additions to PEP 370. It's going to make compilation and usage of custom libraries very easy. Sit back and watch the slide show. :)

The site module has two new options. The --user-base option prints the path to the user base directory to stdout.

$ ~/dev/python/trunk/python -m site --user-base /home/heimes/.local

I install libxslt-1.1.19 into my ~/.local directory.

libxslt-1.1.19$ ./configure --prefix ~/dev/python/trunk/python -m site --user-base libxslt-1.1.19$ make libxslt-1.1.19$ make install ... test -z "/home/heimes/.local/lib" || mkdir -p -- "/home/heimes/.local/lib" /bin/bash ../libtool --mode=install /usr/bin/install -c 'libxslt.la' '/home/heimes/.local/lib/libxslt.la' /usr/bin/install -c .libs/libxslt.so.1.1.19 /home/heimes/.local/lib/libxslt.so.1.1.19

Now I compile lxml against the libraries and include directories in ~/.local. But first I have to add ~/.local/bin to PATH so lxml picks up the right xslt-config binary.

$ export PATH=~/.local/bin:$PATH

lxml-1.3.6$ ~/dev/python/trunk/python setup.py build_ext --user Building lxml version 1.3.6-8122 setupinfo.py:137: DeprecationWarning: os.popen3 is deprecated. Use the subprocess module. wf, rf, ef = os.popen3(cmd) /home/heimes/dev/python/trunk/Lib/distutils/dist.py:263: UserWarning: Unknown distribution option: 'zip_safe' warnings.warn(msg) running build_ext building 'lxml.etree' extension creating build creating build/temp.linux-i686-2.6-pydebug creating build/temp.linux-i686-2.6-pydebug/src creating build/temp.linux-i686-2.6-pydebug/src/lxml gcc -pthread -fno-strict-aliasing -g -Wall -Wstrict-prototypes -fPIC -I/home/heimes/.local/include -I/usr/include/libxml2 -I/home/heimes/dev/python/trunk/Include -I/home/heimes/dev/python/trunk -I/home/heimes/.local/include -c src/lxml/etree.c -o build/temp.linux-i686-2.6-pydebug/src/lxml/etree.o -w creating build/lib.linux-i686-2.6-pydebug creating build/lib.linux-i686-2.6-pydebug/lxml gcc -pthread -shared build/temp.linux-i686-2.6-pydebug/src/lxml/etree.o -L/home/heimes/.local/lib -L/home/heimes/.local/lib -Wl,-R/home/heimes/.local/lib -lxslt -lexslt -lxml2 -lz -lm -o build/lib.linux-i686-2.6-pydebug/lxml/etree.so building 'lxml.objectify' extension gcc -pthread -fno-strict-aliasing -g -Wall -Wstrict-prototypes -fPIC -I/home/heimes/.local/include -I/usr/include/libxml2 -I/home/heimes/dev/python/trunk/Include -I/home/heimes/dev/python/trunk -I/home/heimes/.local/include -c src/lxml/objectify.c -o build/temp.linux-i686-2.6-pydebug/src/lxml/objectify.o -w gcc -pthread -shared build/temp.linux-i686-2.6-pydebug/src/lxml/objectify.o -L/home/heimes/.local/lib -L/home/heimes/.local/lib -Wl,-R/home/heimes/.local/lib -lxslt -lexslt -lxml2 -lz -lm -o build/lib.linux-i686-2.6-pydebug/lxml/objectify.so building 'lxml.pyclasslookup' extension gcc -pthread -fno-strict-aliasing -g -Wall -Wstrict-prototypes -fPIC -I/home/heimes/.local/include -I/usr/include/libxml2 -I/home/heimes/dev/python/trunk/Include -I/home/heimes/dev/python/trunk -I/home/heimes/.local/include -c src/lxml/pyclasslookup.c -o build/temp.linux-i686-2.6-pydebug/src/lxml/pyclasslookup.o -w gcc -pthread -shared build/temp.linux-i686-2.6-pydebug/src/lxml/pyclasslookup.o -L/home/heimes/.local/lib -L/home/heimes/.local/lib -Wl,-R/home/heimes/.local/lib -lxslt -lexslt -lxml2 -lz -lm -o build/lib.linux-i686-2.6-pydebug/lxml/pyclasslookup.so

lxml-1.3.6$ ~/dev/python/trunk/python setup.py install --user ...

As you can see etree.so is going to load my local libxslt library instead of the system one.

$ ldd /home/heimes/.local/lib/python2.6/site-packages/lxml/etree.so linux-gate.so.1 => (0xb7fc5000) libxslt.so.1 => /home/heimes/.local/lib/libxslt.so.1 (0xb7e89000) libexslt.so.0 => /home/heimes/.local/lib/libexslt.so.0 (0xb7e78000) libxml2.so.2 => /usr/lib/libxml2.so.2 (0xb7d3d000) libz.so.1 => /usr/lib/libz.so.1 (0xb7d28000) libm.so.6 => /lib/tls/i686/cmov/libm.so.6 (0xb7d03000) libpthread.so.0 => /lib/tls/i686/cmov/libpthread.so.0 (0xb7ceb000) libc.so.6 => /lib/tls/i686/cmov/libc.so.6 (0xb7b9c000) libgcrypt.so.11 => /lib/libgcrypt.so.11 (0xb7b4e000) libdl.so.2 => /lib/tls/i686/cmov/libdl.so.2 (0xb7b4a000) /lib/ld-linux.so.2 (0xb7fc6000) libgpg-error.so.0 => /lib/libgpg-error.so.0 (0xb7b46000)

Comments? :)

Christian

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