title: Unmet dependencies for libcurl4-openssl-dev
body: <h3>I need to install <code>libcurl4-openssl-dev</code> on ubuntu 14.04</h3>
  
  <p>I had tried both <strong><code>sudo apt-get install libcurl4-openssl-dev</code></strong> and <strong><code>sudo apt-get install -f libcurl4-openssl-dev</code></strong>, but return:</p>
  
  <blockquote>
    <p><code>The following packages have unmet dependencies:
     libcurl4-openssl-dev : Depends: librtmp-dev but it is not going to be installed
    E: Unable to correct problems, you have held broken packages.</code></p>
  </blockquote>
  
  <p>then I try <strong><code>sudo apt-get install librtmp-dev</code></strong>, which return:</p>
  
  <blockquote>
    <p><code>The following packages have unmet dependencies:
     librtmp-dev : Depends:  libgnutls-dev  but it is not going to be installed
    E: Unable to correct problems, you have held broken packages</code></p>
  </blockquote>
  
  <p>then .. <strong><code>sudo apt-get install libgnutls-dev</code></strong>, which return:</p>
  
  <blockquote>
    <p><code>The following packages have unmet dependencies:
     libgnutls-dev : Depends: libgcrypt11-dev (&gt;= 1.4.0) but it is not going to be installed
                     Depends: libtasn1-6-dev but it is not going to be installed
                     Depends: libp11-kit-dev (&gt;= 0.4) but it is not going to be installed
    E: Unable to correct problems, you have held broken packages.</code></p>
  </blockquote>
  
  <p>The dependence is endless...</p>