Manually compiling xen

```
[sarimon@sarimon-linux-pc xen-4.6.1]$ ./configure
checking build system type... x86_64-unknown-linux-gnu
checking host system type... x86_64-unknown-linux-gnu
Will build the following subsystems:
  xen
  tools
  stubdom
  docs
configure: creating ./config.status
config.status: creating config/Toplevel.mk
config.status: creating config/Paths.mk
=== configuring in tools (/home/sarimon/Downloads/xen-4.6.1/tools)
configure: running /bin/sh ./configure --disable-option-checking '--prefix=/usr/local'  --cache-file=/dev/null --srcdir=.
checking build system type... x86_64-unknown-linux-gnu
checking host system type... x86_64-unknown-linux-gnu
checking for gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking for special C compiler options needed for large files... no
checking for _FILE_OFFSET_BITS value needed for large files... no
checking for gcc... (cached) gcc
checking whether we are using the GNU C compiler... (cached) yes
checking whether gcc accepts -g... (cached) yes
checking for gcc option to accept ISO C89... (cached) none needed
checking whether make sets $(MAKE)... yes
checking for a BSD-compatible install... /usr/bin/install -c
checking for bison... /usr/sbin/bison
checking for flex... /usr/sbin/flex
checking for perl... /usr/sbin/perl
checking for awk... /usr/sbin/awk
checking for ocamlc... ocamlc
OCaml version is 4.02.3
OCaml library path is /usr/lib/ocaml
checking for ocamlopt... ocamlopt
checking for ocamlc.opt... ocamlc.opt
checking for ocamlopt.opt... ocamlopt.opt
checking for ocaml... ocaml
checking for ocamldep... ocamldep
checking for ocamlmktop... ocamlmktop
checking for ocamlmklib... ocamlmklib
checking for ocamldoc... ocamldoc
checking for ocamlbuild... ocamlbuild
checking for ocamlfind... ocamlfind
checking for gawk... /usr/sbin/awk
checking for checkpolicy... no
checking for bash... /bin/sh
checking for python... /usr/sbin/python
checking for python version >= 2.3 ... yes
checking how to run the C preprocessor... gcc -E
checking for grep that handles long lines and -e... /usr/sbin/grep
checking for egrep... /usr/sbin/grep -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
  File "<string>", line 1
    import distutils.sysconfig;     print distutils.sysconfig.get_config_var("VERSION")
                                                  ^
SyntaxError: invalid syntax
checking for python-config... /usr/sbin/python-config
checking Python.h usability... yes
checking Python.h presence... yes
checking for Python.h... yes
checking for PyArg_ParseTuple in -lpython... no
configure: error: Unable to find a suitable python development library
configure: error: ./configure failed for tools
[sarimon@sarimon-linux-pc xen-4.6.1]$


```