Add external modulesold-branches/dynamic-modules-rc2

* configure.ac: Add libtool support and module Makefiles.

* src/Makefile.in: Support libtool.

* src/alloc.c (mark_object): Mark the doc field of Lisp_Subr as object.

* src/doc.c (doc_is_from_module_p, get_doc_string, reread_doc_file)
(store_function_docstring, build_file_p, Fsnarf_documentation):
Support docstrings for external modules.

* src/lisp.h: Make the doc field of Lisp_Subr a Lisp_Object.

* src/lread.c (Fget_load_suffixes, Fload_module, string_suffixes_p)
(string_suffix_p, Fload, intern_c_string_1, defsubr)
(syms_of_lread): Add loading of external modules and the
docstrings of their functions.

* modules/curl: New module.

* modules/elisp: New module.

* modules/fmod: New module.

* modules/opaque: New module.

* modules/yaml: New module.

2 files changed, 72 insertions, 0 deletions

diff --git a/modules/fmod/Makefile.in b/modules/fmod/Makefile.in
new file mode 100644
index 00000000000..ad9016a1cee
--- /dev/null
+++ b/modules/fmod/Makefile.in
@@ -0,0 +1,12 @@
+ROOT = ../..
+
+all: fmod.so fmod.doc
+
+%.so: %.o
+        gcc -shared -o $@ $<
+
+%.o: %.c
+        gcc -ggdb3 -Wall -I$(ROOT)/src -I$(ROOT)/lib -fPIC -c $<
+
+%.doc: %.c
+        $(ROOT)/lib-src/make-docfile $< > $@
diff --git a/modules/fmod/fmod.c b/modules/fmod/fmod.c
new file mode 100644
index 00000000000..57da6168ae2
--- /dev/null
+++ b/modules/fmod/fmod.c
@@ -0,0 +1,60 @@
+#include <config.h>
+#include <lisp.h>
+
+#include <math.h>
+
+/* emacs checks for this symbol before running the module */
+
+int plugin_is_GPL_compatible;
+
+/* module feature name */
+static Lisp_Object Qfmod;
+
+/* define a new lisp function */
+
+EXFUN (Ffmod, 2);
+DEFUN ("fmod", Ffmod, Sfmod, 2, 2, 0,
+       doc: "Returns the floating-point remainder of NUMER/DENOM")
+  (Lisp_Object numer, Lisp_Object denom)
+{
+  return make_float (fmod (extract_float (numer), extract_float (denom)));
+}
+
+EXFUN (Ffmod_test1, 0);
+DEFUN ("fmod-test1", Ffmod_test1, Sfmod_test1, 0, 0, 0,
+       doc: "Return 1")
+  (void)
+{
+  return make_float (1.);
+}
+
+EXFUN (Ffmod_test2, 0);
+DEFUN ("fmod-test2", Ffmod_test2, Sfmod_test2, 0, 0, 0,
+       doc: "Return 2")
+  (void)
+{
+  return make_float (2.);
+}
+
+
+EXFUN (Ffmod_test3, 0);
+DEFUN ("fmod-test3", Ffmod_test3, Sfmod_test3, 0, 0, 0,
+       doc: "Return 3")
+  (void)
+{
+  return make_float (3.);
+}
+
+/* entry point of the module */
+
+void init ()
+{
+  DEFSYM (Qfmod, "fmod");
+
+  defsubr (&Sfmod);
+  defsubr (&Sfmod_test1);
+  defsubr (&Sfmod_test2);
+  defsubr (&Sfmod_test3);
+
+  Fprovide (Qfmod, Qnil);
+}