title: echo in makefile.am if loop
body: <p>I am trying to have a prompt in <code>Makefile.am</code> if a condition is not true.
  I am trying as:</p>
  
  <pre><code>if FOUND_MAKEDEPF90
  &lt;compilation condition if true&gt;
  else
  @echo "Create the dependencies Manually\n"
  @echo "e.g. ./src/main.o:./src/main.f90"
  endif
  </code></pre>
  
  <p>The true branch is working properly, but, while running the else branch, I am getting error:</p>
  
  <pre><code> *** missing separator.  Stop.
  </code></pre>
  
  <p>Is it not valid to put an echo statement in the loop?
  What is going wrong here? any idea please?</p>
  
  <p>I am using:</p>
  
  <pre><code>$ make --version
  GNU Make 4.0
  Built for x86_64-redhat-linux-gnu
  </code></pre>