Hello Good people of Emacs!

I'm having trouble exporting unicode math symbols from buffer (org-mode) to pdf file. 

 

 **1. Problem Description:**


Symbols are inserted to the buffer as unicode characters (via [TEX input method][1] or  [company-math][2])

Here is source code demonstration: 

    #+TITLE: Unicode characters export test 
    #+AUThor: 
    #+date:
    Unicode characters:

    ℝ ℤ ℕ ⇒ ∈ ∀ 

    Same symbols in latex format:

    $$\Bbb{R} \Bbb{Z} \Bbb{N} \Rightarrow \in \forall$$


Produced .tex file includes unicode symbols:

    % Created 2016-03-04 Pá 21:01
    \documentclass[11pt]{article}
    \usepackage[utf8]{inputenc}
    \usepackage[T1]{fontenc}
    \usepackage{fixltx2e}
    \usepackage{graphicx}
    \usepackage{longtable}
    \usepackage{float}
    \usepackage{wrapfig}
    \usepackage{rotating}
    \usepackage[normalem]{ulem}
    \usepackage{amsmath}
    \usepackage{textcomp}
    \usepackage{marvosym}
    \usepackage{wasysym}
    \usepackage{amssymb}
    \usepackage{hyperref}
    \tolerance=1000
    \date{}
    \title{Unicode characters export test}
    \hypersetup{
      pdfkeywords={},
      pdfsubject={},
      pdfcreator={Emacs 24.4.1 (Org mode 8.2.10)}}
    \begin{document}
    
    \maketitle
    \tableofcontents
    
    Unicode characters:
    
    ℝ ℤ ℕ ⇒ ∈ ∀ 
    
    Same symbols in latex format:
    
    $$\Bbb{R} \Bbb{Z} \Bbb{N} \Rightarrow \in \forall$$
    % Emacs 24.4.1 (Org mode 8.2.10)
    \end{document}

Pdf file does not :

[![enter image description here][3]][3]


**2. Things I have tried so far:**

**Xelatex and unicode-math:**
This is included in answer from Rasmus. Here I have to admit: I'm not using development version of org-mode he's mentioning. (failed to install it) I've tried xelatex adn unicode-math anyway. My version of Org mode is 8.2.10.

    #+latex_compiler: xelatex
    #+latex_header: \usepackage{libertine}
    #+latex_header: \usepackage{unicode-math}

Including this in file introduces not so lovely message instead pdf file. 

> org-latex-compile: PDF file ./unicode_export_test.pdf wasn't produced:
> [package error]

I have checked for correct unicode-math installation:

    ~ $ kpsewhich unicode-math.sty
    /usr/share/texlive/texmf-dist/tex/latex/unicode-math/unicode-math.sty
Installation of Xelatex is the newest version:

    ~ $ sudo apt-get install texlive-xetex
    Reading package lists... Done
    Building dependency tree       
    Reading state information... Done
    texlive-xetex is already the newest version.
    0 upgraded, 0 newly installed, 0 to remove and 16 not upgraded.

I have failed to install development version of org-mode. Following [How do I keep current with bleeding edge development? - tutorial][4] I have been able (I think) download it and compile it. Since I have no idea how to tell to Emacs run this version,  Emacs runs Org-mode version 8.2.10 (release_8.2.10 @ /usr/local/share/emacs/24.4/lisp/org/).
I have tried to add following lines to my config.

    (add-to-list 'load-path (expand-file-name "~/elisp/org-mode/lisp"))
    (remove 'load-path (expand-file-name "/usr/local/share/emacs/24.4/lisp/org/"))
    (add-to-list 'auto-mode-alist '("\\.\\(org\\|org_archive\\|txt\\)$" . org-mode))
    (require 'org)
Without pleasing result.


**3. Question: How to export unicode characters from org-mode to pdf?**

 - Do I have to configure some org-mode variable?
 - Compile with different Latex interpreter?
 - Any other ideas?
 - If development version fixes this.... How can I install it?


  [1]: https://www.emacswiki.org/emacs/TeXInputMethod
  [2]: https://github.com/vspinu/company-math
  [3]: https://i.sstatic.net/QLw1p.png
  [4]: http://orgmode.org/worg/org-faq.html#keeping-current-with-Org-mode-development