[f2py] mixed f77/f90 code

hi everybody!

is there a principal problem to wrap a project with mixed f90/f77 code? i have a 
fortran project that fits functions. the fitting procedures are taken from 
linpack and are f77/fixed format, while the functions and the driver are written 
in free format. compiling the project, i end up with errors like

error: 'fcn_typedef' undeclared (first use in this function)
error: (Each undeclared identifier is reported only once
error: for each function it appears in.)
error: syntax error before 'fcn_cptr'
error: 'fcn_cptr' undeclared (first use in this function)
error: 'fcn' undeclared (first use in this function)
error: 'fcn_nofargs' undeclared (first use in this function)
error: stray '#' in program
error: stray '#' in program
error: 'maxnofargs' undeclared (first use in this function)
error: stray '#' in program
error: stray '#' in program
error: 'nofoptargs' undeclared (first use in this function)

i can compile the project with gfortran fine, just the f2py wrapping doesn't 
work. any ideas on this one? thanks everybody!

jaspeR