Add loadable modules using Daniel Colascione's ideas.scratch/dynamic-modules-2

See https://lists.gnu.org/archive/html/emacs-devel/2015-02/msg00960.html

* src/Makefile.in (base_obj): add module.o
  (LIBES): add -lltdl

* src/emacs.c (main): add syms_of_module

* src/lisp.h: add syms_of_module

* src/emacs_module.h: New file; emacs API for modules.

* src/module.c: New file; implement API.

* modules/basic/Makefile: New file; build example module on Linux.

* modules/basic/basic.c: New file; simple example module.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/emacs.c b/src/emacs.c
index 8396f5d4e45..b9e748b364c 100644
--- a/src/emacs.c
+++ b/src/emacs.c
@@ -1432,6 +1432,9 @@ Using an Emacs configured with --with-x-toolkit=lucid does not have this problem
       syms_of_terminal ();
       syms_of_term ();
       syms_of_undo ();
+
+      syms_of_module ();
+
 #ifdef HAVE_SOUND
       syms_of_sound ();
 #endif