How to modify port source code before 'make' ?

[Ion-Mihai Tetcu]

On Tue, 4 Apr 2006 18:07:47 +1000
Adrian <adrian.jfl at gmail.com> wrote:

> Hi,
> 
> I'm trying to install a port.. I know a little and can
> make the changes I need to but when I 'make'  it
> refetches the file from /usr/ports/distfiles
> and scraps the changes I've made!
> 
> I've tried updating the dist file and putting it back in
> that directory but it seems to perform a hash check
> on it!
> 
> Is there a standard way to do this?

See porters handbook, the sections about patch files.
/usr/share/doc/en_US.ISO8859-1/books/porters-handbook/slow-patch.html

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