<p>In order to distribute a function I've written that depends on other functions I've written that have their own dependencies and so on without distributing every m-file I have ever written, I need to figure out what the full list of dependencies is for a given m-file. Is there a built-in/freely downloadable way to do this?</p>

<p>Specifically I am interested in solutions for MATLAB 7.4.0 (R2007a), but if there is a different way to do it in older versions, by all means please add them here.  </p>

For newer releases of Matlab (eg 2007 or 2008) you could use the built in functions:
mlint
dependency report and
coverage report
Another option is to use Matlab's profiler. The command is profile, it can also be used to track dependencies.  To use profile, you could do
```
```
>> profile on   % turn profiling on
>> foo;         % entry point to your matlab function or script
>> profile off  % turn profiling off
>> profview     % view the report
```
```
If profiler is not available, then perhaps the following two functions are (for pre-MATLAB 2015a):
depfun
depdir
For example,
```
```
>> deps = depfun('foo');
```
```
gives a structure, deps, that contains all the dependencies of foo.m.
From answers
2
, and
3
, newer versions of MATLAB (post 2015a) use
```
matlab.codetools.requiredFilesAndProducts
```
instead.
See answers
EDIT:
Caveats thanks to @Mike Katz comments
Remember that the Profiler will only
  show you files that were actually used
  in those runs, so if you don't go
  through every branch, you may have
  additional dependencies. The
  dependency report is a good tool, but
  only resolves static dependencies on
  the path and just for the files in a
  single directory.
Depfun is more reliable but gives you
  every possible thing it can think of,
  and still misses LOAD's and EVAL's.