Eclipse CDT: no rule to make target all

Question

My Eclipse CDT keeps complaining \"make: *** no rule to make target all\" when I am trying to compile the piece of code below:

#include 
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Answer 1

1. Select Project->Properties from the menu bar.

2. Click C/C++ Build on the left in the dialog that comes up.

3. Under the Builder Settings tab on the right, check and make sure the "Build location" is correct.