my @functions;     # list of all function names
my @typedefs;      # list of all typedef names
my @variables;     # list of all variables names
my @constants;     # list of all constants names
my %defined_in;    # maps a name to a source file name
my %pattern;       # maps a name to a pattern that can be used to
                   # look-up the name in a source file.
my %calls          # maps a function name to a list of function names
                   # that are called by that function.

##</code><code>##

my %program;

##</code><code>##

$program{"functions"}