Empty .pyd and .pxd files after compilation

[Lewis John Mcgibbney]

Hi Folks,
This is a rather lengthy mail so apologies in advance, I really appreciate any help.
I am getting empty files after compiling my xdress.py file on the following set up

Environment

OS: ubuntu 14.04 LTS

$ xdress --version
XDress: 0.5-dev
pycparser (optional): 2.10
lxml (optional): 3.3.3
Numpy (optional): 1.9.2
Cython (optional): 0.20.1post0

xdress.py

My xdress.py file looks like the following, where I have all of my C code and associated header files in a directory 'src' in the same directory as the xdress.py file is being execute from.

package = 'runtime'       # top-level python package name
packagedir = 'runtime'    # location of the python package

# wrappers for non-standard types (uints, complex)
extra_types = 'xdress_extra_types'

# List of C++ standard library container template types
# to instantiate and wrap with Cython. See the type
# system documentation for more details.  Note that
# vectors are wrapped as numpy arrays of the appropriate
# type.  If the type has no corresponding primitive C++
# type, then a new numpy dtype is created to handle it.
# For example, this allows the wrapping of vector< vector<int> >
# as an np.array(..., dtype=xd_vector_int).
stlcontainers = [
    ('vector', 'str'),
    ('vector', 'int32'),
    ('vector', 'complex'),
    ('vector', 'float32'),
    ('vector', 'float64'),
    ('vector', ('vector', 'float64')),
    ('set', 'int'),
    ('set', 'str'),
    ('set', 'uint'),
    ('set', 'char'),
    ('map', 'str', 'str'),
    ('map', 'str', 'int'),
    ('map', 'int', 'str'),
    ('map', 'str', 'uint'),
    ('map', 'uint', 'str'),
    ('map', 'uint', 'uint'),
    ('map', 'str', 'float'),
    ('map', 'int', 'int'),
    ('map', 'int', 'bool'),
    ('map', 'int', 'char'),
    ('map', 'int', 'float'),
    ('map', 'uint', 'float'),
    ('map', 'int', 'complex'),
    ('map', 'int', ('set', 'int')),
    ('map', 'int', ('set', 'str')),
    ('map', 'int', ('set', 'uint')),
    ('map', 'int', ('set', 'char')),
    ('map', 'int', ('vector', 'str')),
    ('map', 'int', ('vector', 'int')),
    ('map', 'int', ('vector', 'uint')),
    ('map', 'int', ('vector', 'char')),
    ('map', 'int', ('vector', 'bool')),
    ('map', 'int', ('vector', 'float')),
    ('map', 'int', ('vector', ('vector', 'float64'))),
    ('map', 'int', ('map', 'int', 'bool')),
    ('map', 'int', ('map', 'int', 'char')),
    ('map', 'int', ('map', 'int', 'float')),
    ('map', 'int', ('map', 'int', ('vector', 'bool'))),
    ('map', 'int', ('map', 'int', ('vector', 'char'))),
    ('map', 'int', ('map', 'int', ('vector', 'float'))),
    ]

functions = [('setup_mapping', 'src/espa_geoloc.*'),
             ('get_geoloc_info', 'src/espa_geoloc.*'),
             ('main', 'src/scag.*'),
             ('input_file_io', 'src/scag.*'),
             ('output_file_io', 'src/scag.*'),
             ('model_types_io', 'src/scag.*'),
             ('next_field', 'src/scag.*'),
             ('next_blank', 'src/scag.*'),
             ('spectral_library_io', 'src/scag.*'),
             ('initialize_models', 'src/scag.*'),
             ('next_comma', 'src/scag.*'),
             ('mixture', 'src/scag.*'),
             ('scag_process_thread', 'src/scag.*'),
             ('fraction', 'src/scag.*'),
             ('fit_constraints', 'src/scag.*'),
             ('shade_normalization', 'src/scag.*'),
             ('signal_handler', 'src/scag.*')
             ]

Results

This results in the following, a 'runtime' directory is generated containing .pyd and .pxd counterparts with the following content

.pxd

################################################
#                 WARNING!                     #
# This file has been auto-generated by xdress. #
# Do not modify!!!                             #
#                                              #
#                                              #
#                    Come on, guys. I mean it! #
################################################






{'cpppxd_footer': '', 'pyx_header': '', 'pxd_header': '', 'pxd_footer': '', 'cpppxd_header': '', 'pyx_footer': ''}

.pyx

################################################
#                 WARNING!                     #
# This file has been auto-generated by xdress. #
# Do not modify!!!                             #
#                                              #
#                                              #
#                    Come on, guys. I mean it! #
################################################
"""
"""
cimport c_scag

{'cpppxd_footer': '', 'pyx_header': '', 'pxd_header': '', 'pxd_footer': '', 'cpppxd_header': '', 'pyx_footer': ''}

Question
Is there something wrong with the configuration of my xdress.py file? I am pretty sure that the .pxd and .pyx files should not be empty.

Thanks in advance for any help.
Best
Lewis