(Fdefvar, Fdefconst, Fdefvaralias):

Record variables in load history as (defvar . VAR).
(Fdefvar): Don't record in load history if no initial value.
(Qdefvar): New variable.
(syms_of_eval): Init and staticpro it.

diff --git a/src/eval.c b/src/eval.c
index c433dae71ce8dfc355bcf260ade683b096edeba3..b48fbd5fa2b2cd414bd0e133236c6e9e02d1be2d 100644 (file)
--- a/src/eval.c
+++ b/src/eval.c
@@ -87,7 +87,7 @@ struct catchtag *catchlist;
 int gcpro_level;
 #endif
 
-Lisp_Object Qautoload, Qmacro, Qexit, Qinteractive, Qcommandp, Qdefun;
+Lisp_Object Qautoload, Qmacro, Qexit, Qinteractive, Qcommandp, Qdefun, Qdefvar;
 Lisp_Object Qinhibit_quit, Vinhibit_quit, Vquit_flag;
 Lisp_Object Qand_rest, Qand_optional;
 Lisp_Object Qdebug_on_error;
@@ -731,7 +731,7 @@ Third arg DOCSTRING, if non-nil, is documentation for SYMBOL.  */)
   sym->indirect_variable = 1;
   sym->value = aliased;
   sym->constant = SYMBOL_CONSTANT_P (aliased);
-  LOADHIST_ATTACH (symbol);
+  LOADHIST_ATTACH (Fcons (Qdefvar, symbol));
   if (!NILP (docstring))
     Fput (symbol, Qvariable_documentation, docstring);
 
@@ -777,14 +777,12 @@ usage: (defvar SYMBOL &optional INITVALUE DOCSTRING)  */)
            tem = Fpurecopy (tem);
          Fput (sym, Qvariable_documentation, tem);
        }
-      LOADHIST_ATTACH (sym);
+      LOADHIST_ATTACH (Fcons (Qdefvar, sym));
     }
   else
-    /* A (defvar <var>) should not take precedence in the load-history over
-       an earlier (defvar <var> <val>), so only add to history if the default
-       value is still unbound.  */
-    if (NILP (tem))
-      LOADHIST_ATTACH (sym);
+    /* Simple (defvar <var>) should not count as a definition at all.
+       It could get in the way of other definitions, and unloading this
+       package could try to make the variable unbound.  */
     
   return sym;
 }
@@ -817,7 +815,7 @@ usage: (defconst SYMBOL INITVALUE [DOCSTRING])  */)
        tem = Fpurecopy (tem);
       Fput (sym, Qvariable_documentation, tem);
     }
-  LOADHIST_ATTACH (sym);
+  LOADHIST_ATTACH (Fcons (Qdefvar, sym));
   return sym;
 }
 
@@ -3309,6 +3307,9 @@ before making `inhibit-quit' nil.  */);
   Qdefun = intern ("defun");
   staticpro (&Qdefun);
 
+  Qdefvar = intern ("defvar");
+  staticpro (&Qdefvar);
+
   Qand_rest = intern ("&rest");
   staticpro (&Qand_rest);