[O] Org Babel C/C++

[Daimrod]

Hi,

I've made a small patch to ob-C.el so it now includes the current
directory to the list of directories to be searched for header files.
Without this, I cannot include a local header file because the
compilation happens in /tmp and thus gcc or g++ doesn't search for
header files in the directory I currently work.

diff --git a/lisp/ob-C.el b/lisp/ob-C.el
index f1525aa..4f33fc4 100644
--- a/lisp/ob-C.el
+++ b/lisp/ob-C.el
@@ -96,15 +96,14 @@ or `org-babel-execute:C++'."
          (progn
            (with-temp-file tmp-src-file (insert full-body))
            (org-babel-eval
-            (format "%s -o %s %s %s -I \"%s\""
+            (format "%s -o %s %s %s"
                     (cond
                      ((equal org-babel-c-variant 'c) org-babel-C-compiler)
                      ((equal org-babel-c-variant 'cpp) org-babel-C++-compiler))
                     (org-babel-process-file-name tmp-bin-file)
                     (mapconcat 'identity
                                (if (listp flags) flags (list flags)) " ")
-                    (org-babel-process-file-name tmp-src-file)
-                    (file-name-directory (expand-file-name 
(buffer-file-name)))) ""))))
+                    (org-babel-process-file-name tmp-src-file)) ""))))
     ((lambda (results)
        (org-babel-reassemble-table
        (if (member "vector" (cdr (assoc :result-params params)))