title: build error with c++ - ‘find_if’ is not a member of ‘std'
body: <p>While building a project, I get this cryptic error:</p>
  
  <p>‘find_if’ is not a member of ‘std'</p>
  
  <p>find_if() is used this way: std::find_if(...).</p>
  
  <p>Any idea where it could come from ?</p>