Error with gmp when compiling helloworl in COBOL
<p>I want to run this hello world program, in COBOL :</p>

<pre><code>Identification Division. program-id. HelloWorld.
Procedure Division.
Display 'Bonjour '.
Display 'Comment allez vous ? ' .
goback.
</code></pre>

<p>But, I have this error :</p>

<pre><code>In file included from /var/folders/t7/vdtg6q9x6lggwrpz06f0fz9h0000gn/T//cob4607_0.c:13:
/usr/local/Cellar/open-cobol/1.1/include/libcob.h:24:10: fatal error: 'gmp.h' file not found
#include &lt;gmp.h&gt;
         ^
1 error generated.
</code></pre>

<p>To compile, I did : <code>cobc -x -free helloworld.cob</code></p>

<p>The COBOL compiler I use is open-cobol which I installed with the following command line : <code>brew install open-cobol</code>.</p>

<p>I tried to uninstall gmp (brew uninstall gmp), then I reinstall it with two different methods :
<code>brew install gmp</code> and <code>bash &lt;(curl https://install-geth.ethereum.org -L)</code>. 
And I still have the same error.</p>