checking build system type... x86_64-unknown-linux-gnu
checking host system type... x86_64-unknown-linux-gnu
Will build the following subsystems:
  xen
  kernels
  tools
  stubdom
  docs
configure: creating ./config.status
config.status: creating ./config/Toplevel.mk
=== configuring in tools (/home/commander/xen/tools)
configure: running /bin/bash ./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... no
checking for flex... no
checking for perl... /usr/bin/perl
checking for ocamlc... no
checking for ocaml... no
checking for ocamldep... no
checking for ocamlmktop... no
checking for ocamlmklib... no
checking for ocamldoc... no
checking for ocamlbuild... no
checking for ocamlfind... no
checking for checkpolicy... no
checking for bash... /bin/bash
checking for python... /usr/bin/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... /bin/grep
checking for egrep... /bin/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
checking for python-config... no
checking Python.h usability... no
checking Python.h presence... no
checking for Python.h... no
configure: error: Unable to find Python development headers
configure: error: ./configure failed for tools