Installing collected packages: django-celery, kombu, celery, anyjson, billiard
  Found existing installation: django-celery 2.2.7
    Uninstalling django-celery:
      Successfully uninstalled django-celery
  Running setup.py install for django-celery
    changing mode of build/scripts-2.6/djcelerymon from 644 to 755
    no previously-included directories found matching 'bin/*.pyc'
    no previously-included directories found matching 'tests/*.pyc'
    no previously-included directories found matching 'docs/*.pyc'
    no previously-included directories found matching 'extra/*.pyc'
    no previously-included directories found matching 'djcelery/*.pyc'
    no previously-included directories found matching 'docs/.build'
    no previously-included directories found matching 'examples/*.pyc'
    changing mode of /usr/bin/djcelerymon to 755
    Installing djcelerymon script to /usr/bin
  Found existing installation: kombu 1.5.1
    Uninstalling kombu:
      Successfully uninstalled kombu
  Running setup.py install for kombu
  Found existing installation: celery 2.4.5
    Uninstalling celery:
      Successfully uninstalled celery
  Running setup.py install for celery
    Upgrade: no old version found.
    no previously-included directories found matching '*.pyc'
    Installing celeryctl script to /usr/bin
    Installing celeryd script to /usr/bin
    Installing camqadm script to /usr/bin
    Installing celeryev script to /usr/bin
    Installing celery script to /usr/bin
    Installing celeryd-multi script to /usr/bin
    Installing celerybeat script to /usr/bin
  Found existing installation: anyjson 0.3.1
    Uninstalling anyjson:
      Successfully uninstalled anyjson
  Running setup.py install for anyjson
  Running setup.py install for billiard
    building '_billiard' extension
    gcc -pthread -fno-strict-aliasing -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -D_GNU_SOURCE -fPIC -fwrapv -DNDEBUG -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -D_GNU_SOURCE -fPIC -fwrapv -fPIC -DHAVE_SEM_OPEN=1 -DHAVE_FD_TRANSFER=1 -DHAVE_SEM_TIMEDWAIT=1 -IModules/_billiard -I/usr/include/python2.6 -c Modules/_billiard/multiprocessing.c -o build/temp.linux-x86_64-2.6/Modules/_billiard/multiprocessing.o
    unable to execute gcc: No such file or directory


    -----------------------------------------------------------------------
    WARNING: The C extensions could not be compiled
    -----------------------------------------------------------------------

    Maybe you do not have a C compiler installed on this system?
    The reason was:
      File "<string>", line 1, in <module>

      File "/root/build/billiard/setup.py", line 226, in <module>
        sys.stderr.write(BUILD_WARNING % '\n'.join(traceback.format_stack(), ))


    This is just a warning as most of the functionality will work even
    without the updated C extension.  It will simply fallback to the
    built-in _multiprocessing module.  Most notably you will not be able to use
    FORCE_EXECV on POSIX systems.  If this is a problem for you then please
    install a C compiler or fix the error(s) above.
    -----------------------------------------------------------------------

    warning: no files found matching '*.py' under directory 'Lib'
Successfully installed django-celery kombu celery anyjson billiard
Cleaning up...