Hi Tiago! $ $PYTHON_VERSION bash: 2.7: command not found $ uname -a Linux compu4 3.2.6-2-ARCH #1 SMP PREEMPT Thu Feb 16 10:10:02 CET 2012 x86_64 AMD Phenom(tm) II X6 1055T Processor AuthenticAMD GNU/Linux $ pacman -Q boost boost 1.48.0-2 $ pacman -Q boost-libs boost-libs 1.48.0-2 $ pacman -Q python2 python2 2.7.2-5 $ pacman -Q autoconf autoconf 2.68-2 $ pacman -Q automake automake 1.11.3-1 $ pacman -Q libtool libtool 2.4.2-3 $ pacman -Q gcc gcc 4.6.2-7 $ pacman -Q openmpi openmpi 1.5.4-4 $ pacman -Q expat expat 2.0.1-7 $ pacman -Q python2-numpy python2-numpy 1.6.1-1 $ pacman -Q python2-scipy python2-scipy 0.10.0-1 $ pacman -Q cgal cgal 3.9-4 $ pacman -Q graphviz graphviz 2.28.0-8 $ git clone git://git.skewed.de/graph-tool $ cd graph-tool $ autoreconf -f -i configure.ac:34: warning: AC_ARG_PROGRAM was called before AC_CANONICAL_TARGET ../../lib/autoconf/general.m4:1834: AC_CANONICAL_TARGET is expanded from... configure.ac:34: the top level configure.ac:34: warning: AC_ARG_PROGRAM was called before AC_CANONICAL_TARGET ../../lib/autoconf/general.m4:1834: AC_CANONICAL_TARGET is expanded from... configure.ac:34: the top level libtoolize: putting auxiliary files in `.'. libtoolize: copying file `./ltmain.sh' libtoolize: putting macros in AC_CONFIG_MACRO_DIR, `m4'. libtoolize: copying file `m4/libtool.m4' libtoolize: copying file `m4/ltoptions.m4' libtoolize: copying file `m4/ltsugar.m4' libtoolize: copying file `m4/ltversion.m4' libtoolize: copying file `m4/lt~obsolete.m4' libtoolize: Consider adding `-I m4' to ACLOCAL_AMFLAGS in Makefile.am. configure.ac:34: warning: AC_ARG_PROGRAM was called before AC_CANONICAL_TARGET ../../lib/autoconf/general.m4:1834: AC_CANONICAL_TARGET is expanded from... configure.ac:34: the top level configure.ac:34: warning: AC_ARG_PROGRAM was called before AC_CANONICAL_TARGET ../../lib/autoconf/general.m4:1834: AC_CANONICAL_TARGET is expanded from... configure.ac:34: the top level configure.ac:163: error: possibly undefined macro: AC_PYTHON_DEVEL If this token and others are legitimate, please use m4_pattern_allow. See the Autoconf documentation. configure.ac:202: error: possibly undefined macro: AC_PYTHON_MODULE autoreconf: /usr/bin/autoconf failed with exit status: 1 Then I added at the beginning of Makefile.am: ACLOCAL_AMFLAGS = -I m4 after $ autoreconf -f -i I can do $ ./configure --enable-openmpi $ make -j3 After a while (I have 6 cores on my processor and I had to use 3 cores because of the RAM requirements... I got 8 GB of RAM), I can install with $ sudo make install But when in the ipython2 prompt I get the following error: In [2]: from graph_tool.all import * --------------------------------------------------------------------------- ImportError Traceback (most recent call last) /home/oscar/graph-tool/<ipython-input-2-100bbe2bc9d9> in <module>() ----> 1 from graph_tool.all import * ImportError: No module named graph_tool.all I guess I have to tell python where to find the module, but I don't know how to do it Help, please!