emacs diff not available

[hugobajas]

Hello,

I am new in the field of editing with emacs and need help.

I have dowloaded cygwin and would like to use emacs as text editor.

The first thing I wanted to do is to compare 2 files.

To do so, I lauch emacs from the "C:\cygwin\bin" where I find
"emacs-w32.exe".

I then open my two files. 
Then, I do "tool -> compare -> two buffers" but a message appears saying "No
such file or directory, diff".

But in "C:\cygwin\bin" there is "diff.exe".

I do not understand what is missing?

Could you help me please with that?

Best regards,

Hugo  



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