How to encapsualte code blocks into a frame when exporting to pdf?

Question

I have been using org-mode + emacs for a while now, and I love how easy it is to produce contents. I often use the html + pdf export combo from the same document (first, a web page, following, a pdf document). My problem is about exporting code blocks (#+BEGIN_SRC...) to pdf.

To html, the export command (C-c C-e h h) gives me a satisfactory solution: it uses a frame to encapsulate the code (showing the programming language when you rest the mouse pointer on it) and uses a different frame for the resulting messages (as I set :export both). When using #+CAPTION: my caption here before the #+BEGIN_SRC, resulting html page includes "Listing #: my caption here" before the code frame.

To pdf, the document generated by export command (C-c C-e l p) doesn't have frames around neither code or results (a real mess), and captions show up as "Figure #: my caption here" in between the code and results.

How do I get both different frames for code and results and Listings-like captions for my code blocks when exporting from org-mode to pdf?

Here is a minimal example:

#+TITLE: EXPORT TESTINGS
#+OPTIONS: toc:nil

#+CAPTION: Caption, my caption!
#+BEGIN_SRC C :results output :exports both
int i, x = 10;
for(i = 0; i < x; i++)
    printf("%d ",i);
printf(" ~ %d\n", x);
#+END_SRC

Here is the resulting html and the resulting pdf.

Answer 1

Based on the Alex Ott answer (and a couple hours of web browsing) I finally did it.

We are going to use the minted package. For completness, this how I had to set up everything:

---

Python is needed

minted use a Python package to highlight syntax called Pygmets. You could install it with:

pip install Pygments

---

Emacs setup

• In org file preamble you need the line: #+LaTeX_HEADER: \usepackage{minted}
• Source code block export use the variable org-latex-listings. You have to set it with: (setq org-latex-listings 'minted).
• Last but not least, you have to allow pdflatex to execute shell commands in order to use the Python package Pygments. The option is -shell-escape. And the emacs variable that describes the call to the LaTeX compiler is org-latex-pdf-process.

To achieve those 3 points, I have added this snipet in my init file

;; inside .emacs file
(setq org-latex-listings 'minted
      org-latex-packages-alist '(("" "minted"))
      org-latex-pdf-process
      '("pdflatex -shell-escape -interaction nonstopmode -output-directory %o %f"
        "pdflatex -shell-escape -interaction nonstopmode -output-directory %o %f"
        "pdflatex -shell-escape -interaction nonstopmode -output-directory %o %f"))

NB: see here to understand why three calls to pdflatex are needed. If you use bibtex you have to insert the appropriate line.

---

Back to your Org file

Now you can add the LaTeX attribute on top of your source code block:

#+ATTR_LATEX: :options frame=single
#+BEGIN_SRC emacs-lisp
  (defun Fib (n)
    (if (< n 2) n (+ (Fib (- n 1)) (Fib (- n 2)))))
#+END_SRC

Et voilà !

---

Minted manual

To use different frame styles go and check the manual