Allow loading modules by 'load-file'

* src/lread.c (Fload): Call 'unbind_to' with 'Fmodule_load' as the
2nd arg, to avoid the "binding stack not balanced" error.
(syms_of_lread) <module-file-suffix>: New Lisp variable.

* lisp/files.el (module-file-suffix): Declare.
(load-file): Remove 'module-file-suffix' from
'completion-ignored-extensions', to allow completion on modules.

* etc/NEWS: Mention 'module-file-suffix'.

1 files changed, 8 insertions, 1 deletions

diff --git a/src/lread.c b/src/lread.c
index 7f0f1d1f6a8..2239bfc452a 100644
--- a/src/lread.c
+++ b/src/lread.c
@@ -1164,7 +1164,7 @@ Return t if the file exists and loads successfully.  */)
 
 #ifdef HAVE_MODULES
   if (suffix_p (found, MODULES_SUFFIX))
-    return Fmodule_load (found);
+    return unbind_to (count, Fmodule_load (found));
 #endif
 
   /* Check if we're stuck in a recursive load cycle.
@@ -4513,6 +4513,13 @@ to the specified file name if a suffix is allowed or required.  */);
   Vload_suffixes = list2 (build_pure_c_string (".elc"),
                           build_pure_c_string (".el"));
 #endif
+  DEFVAR_LISP ("module-file-suffix", Vmodule_file_suffix,
+               doc: /* Suffix of loadable module file, or nil of modules are not supported.  */);
+#ifdef HAVE_MODULES
+  Vmodule_file_suffix = build_pure_c_string (MODULES_SUFFIX);
+#else
+  Vmodule_file_suffix = Qnil;
+#endif
   DEFVAR_LISP ("load-file-rep-suffixes", Vload_file_rep_suffixes,
                doc: /* List of suffixes that indicate representations of \
 the same file.