alloc.c: Import and export fewer symbols, and remove unused items.

* lisp.h (suppress_checking, die): Declare only if ENABLE_CHECKING
is defined.
(suppress_checking): Add EXTERNALLY_VISIBLE attribute, so that
it's not optimized away by whole-program optimization.
(message_enable_multibyte, free_misc): Remove.
(catchlist, handlerlist, mark_backtrace):
Declare only if BYTE_MARK_STACK.
(mark_byte_stack): Likewise, fixing a ifdef-vs-if typo.
* alloc.c (pure): Export only if VIRT_ADDR_VARIES is defined.
(message_enable_multibyte): Remove decl.
(free_misc, interval_free_list, float_block, float_block_index):
(n_float_blocks, float_free_list, cons_block, cons_block_index):
(cons_free_list, last_marked_index):
Now static.
(suppress_checking, die): Define only if ENABLE_CHECKING is defined.
* eval.c (catchlist, handlerlist): Export only if BYTE_MARK_STACK.
(mark_backtrace): Define only if BYTE_MARK_STACK.
* xdisp.c (message_enable_multibyte): Now static.

5 files changed, 65 insertions, 29 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 0be406a6e7b..43358338c4d 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,5 +1,25 @@
 2011-04-11  Paul Eggert  <eggert@cs.ucla.edu>
 
+        alloc.c: Import and export fewer symbols, and remove unused items.
+        * lisp.h (suppress_checking, die): Declare only if ENABLE_CHECKING
+        is defined.
+        (suppress_checking): Add EXTERNALLY_VISIBLE attribute, so that
+        it's not optimized away by whole-program optimization.
+        (message_enable_multibyte, free_misc): Remove.
+        (catchlist, handlerlist, mark_backtrace):
+        Declare only if BYTE_MARK_STACK.
+        (mark_byte_stack): Likewise, fixing a ifdef-vs-if typo.
+        * alloc.c (pure): Export only if VIRT_ADDR_VARIES is defined.
+        (message_enable_multibyte): Remove decl.
+        (free_misc, interval_free_list, float_block, float_block_index):
+        (n_float_blocks, float_free_list, cons_block, cons_block_index):
+        (cons_free_list, last_marked_index):
+        Now static.
+        (suppress_checking, die): Define only if ENABLE_CHECKING is defined.
+        * eval.c (catchlist, handlerlist): Export only if BYTE_MARK_STACK.
+        (mark_backtrace): Define only if BYTE_MARK_STACK.
+        * xdisp.c (message_enable_multibyte): Now static.
+
         Declare Lisp_Object Q* variables to be 'static' if not exproted.
         This makes it easier for human readers (and static analyzers)
         to see whether these variables are used from other modules.
diff --git a/src/alloc.c b/src/alloc.c
index ad3dfa96cd2..7803ccdc976 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -212,6 +212,9 @@ static int malloc_hysteresis;
    remapping on more recent systems because this is less important
    nowadays than in the days of small memories and timesharing.  */
 
+#ifndef VIRT_ADDR_VARIES
+static
+#endif
 EMACS_INT pure[(PURESIZE + sizeof (EMACS_INT) - 1) / sizeof (EMACS_INT)] = {1,};
 #define PUREBEG (char *) pure
 
@@ -281,8 +284,7 @@ static struct Lisp_String *allocate_string (void);
 static void compact_small_strings (void);
 static void free_large_strings (void);
 static void sweep_strings (void);
-
-extern int message_enable_multibyte;
+static void free_misc (Lisp_Object);
 
 /* When scanning the C stack for live Lisp objects, Emacs keeps track
    of what memory allocated via lisp_malloc is intended for what
@@ -1341,7 +1343,7 @@ static int total_free_intervals, total_intervals;
 
 /* List of free intervals.  */
 
-INTERVAL interval_free_list;
+static INTERVAL interval_free_list;
 
 /* Total number of interval blocks now in use.  */
 
@@ -2460,19 +2462,19 @@ struct float_block
 
 /* Current float_block.  */
 
-struct float_block *float_block;
+static struct float_block *float_block;
 
 /* Index of first unused Lisp_Float in the current float_block.  */
 
-int float_block_index;
+static int float_block_index;
 
 /* Total number of float blocks now in use.  */
 
-int n_float_blocks;
+static int n_float_blocks;
 
 /* Free-list of Lisp_Floats.  */
 
-struct Lisp_Float *float_free_list;
+static struct Lisp_Float *float_free_list;
 
 
 /* Initialize float allocation.  */
@@ -2572,15 +2574,15 @@ struct cons_block
 
 /* Current cons_block.  */
 
-struct cons_block *cons_block;
+static struct cons_block *cons_block;
 
 /* Index of first unused Lisp_Cons in the current block.  */
 
-int cons_block_index;
+static int cons_block_index;
 
 /* Free-list of Lisp_Cons structures.  */
 
-struct Lisp_Cons *cons_free_list;
+static struct Lisp_Cons *cons_free_list;
 
 /* Total number of cons blocks now in use.  */
 
@@ -3168,7 +3170,7 @@ allocate_misc (void)
 
 /* Free a Lisp_Misc object */
 
-void
+static void
 free_misc (Lisp_Object misc)
 {
   XMISCTYPE (misc) = Lisp_Misc_Free;
@@ -5216,7 +5218,7 @@ mark_face_cache (struct face_cache *c)
 
 #define LAST_MARKED_SIZE 500
 static Lisp_Object last_marked[LAST_MARKED_SIZE];
-int last_marked_index;
+static int last_marked_index;
 
 /* For debugging--call abort when we cdr down this many
    links of a list, in mark_object.  In debugging,
@@ -6108,6 +6110,7 @@ Frames, windows, buffers, and subprocesses count as vectors
   return Flist (8, consed);
 }
 
+#ifdef ENABLE_CHECKING
 int suppress_checking;
 
 void
@@ -6117,6 +6120,7 @@ die (const char *msg, const char *file, int line)
            file, line, msg);
   abort ();
 }
+#endif
 
 /* Initialization */
 
diff --git a/src/eval.c b/src/eval.c
index cefdf784faf..dddedc77286 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -57,8 +57,23 @@ struct backtrace
 };
 
 struct backtrace *backtrace_list;
+
+#if !BYTE_MARK_STACK
+static
+#endif
 struct catchtag *catchlist;
 
+/* Chain of condition handlers currently in effect.
+   The elements of this chain are contained in the stack frames
+   of Fcondition_case and internal_condition_case.
+   When an error is signaled (by calling Fsignal, below),
+   this chain is searched for an element that applies.  */
+
+#if !BYTE_MARK_STACK
+static
+#endif
+struct handler *handlerlist;
+
 #ifdef DEBUG_GCPRO
 /* Count levels of GCPRO to detect failure to UNGCPRO.  */
 int gcpro_level;
@@ -1345,14 +1360,6 @@ usage: (unwind-protect BODYFORM UNWINDFORMS...)  */)
   return unbind_to (count, val);
 }
 
-/* Chain of condition handlers currently in effect.
-   The elements of this chain are contained in the stack frames
-   of Fcondition_case and internal_condition_case.
-   When an error is signaled (by calling Fsignal, below),
-   this chain is searched for an element that applies.  */
-
-struct handler *handlerlist;
-
 DEFUN ("condition-case", Fcondition_case, Scondition_case, 2, UNEVALLED, 0,
        doc: /* Regain control when an error is signaled.
 Executes BODYFORM and returns its value if no error happens.
@@ -3629,6 +3636,7 @@ If NFRAMES is more than the number of frames, the value is nil.  */)
 }
 
 
+#if BYTE_MARK_STACK
 void
 mark_backtrace (void)
 {
@@ -3648,6 +3656,7 @@ mark_backtrace (void)
         mark_object (backlist->args[i]);
     }
 }
+#endif
 
 void
 syms_of_eval (void)
diff --git a/src/lisp.h b/src/lisp.h
index fb44002b6a6..b06626ad379 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -55,11 +55,11 @@ extern void check_cons_list (void);
 #endif
 
 /* Extra internal type checking?  */
-extern int suppress_checking;
-extern void die (const char *, const char *, int) NO_RETURN;
 
 #ifdef ENABLE_CHECKING
 
+extern void die (const char *, const char *, int) NO_RETURN;
+
 /* The suppress_checking variable is initialized to 0 in alloc.c.  Set
    it to 1 using a debugger to temporarily disable aborting on
    detected internal inconsistencies or error conditions.
@@ -74,6 +74,8 @@ extern void die (const char *, const char *, int) NO_RETURN;
    STRINGP (x), but a particular use of XSTRING is invoked only after
    testing that STRINGP (x) is true, making the test redundant.  */
 
+extern int suppress_checking EXTERNALLY_VISIBLE;
+
 #define CHECK(check,msg) (((check) || suppress_checking         \
                            ? (void) 0                           \
                            : die ((msg), __FILE__, __LINE__)),  \
@@ -1968,8 +1970,6 @@ struct handler
     struct handler *next;
   };
 
-extern struct handler *handlerlist;
-
 /* This structure helps implement the `catch' and `throw' control
    structure.  A struct catchtag contains all the information needed
    to restore the state of the interpreter after a non-local jump.
@@ -2005,7 +2005,6 @@ struct catchtag
   struct byte_stack *byte_stack;
 };
 
-extern struct catchtag *catchlist;
 extern struct backtrace *backtrace_list;
 
 extern Lisp_Object memory_signal_data;
@@ -2615,7 +2614,6 @@ extern Lisp_Object Qrisky_local_variable;
 extern struct frame *last_glyphless_glyph_frame;
 extern unsigned last_glyphless_glyph_face_id;
 extern int last_glyphless_glyph_merged_face_id;
-extern int message_enable_multibyte;
 extern int noninteractive_need_newline;
 extern Lisp_Object echo_area_buffer[2];
 extern void add_to_log (const char *, Lisp_Object, Lisp_Object);
@@ -2724,7 +2722,6 @@ extern Lisp_Object make_float (double);
 extern void display_malloc_warning (void);
 extern int inhibit_garbage_collection (void);
 extern Lisp_Object make_save_value (void *, int);
-extern void free_misc (Lisp_Object);
 extern void free_marker (Lisp_Object);
 extern void free_cons (struct Lisp_Cons *);
 extern void init_alloc_once (void);
@@ -2822,6 +2819,10 @@ extern Lisp_Object Qand_rest;
 extern Lisp_Object Vautoload_queue;
 extern Lisp_Object Vsignaling_function;
 extern int handling_signal;
+#if BYTE_MARK_STACK
+extern struct catchtag *catchlist;
+extern struct handler *handlerlist;
+#endif
 /* To run a normal hook, use the appropriate function from the list below.
    The calling convention:
 
@@ -2882,7 +2883,9 @@ extern Lisp_Object safe_call (size_t, Lisp_Object *);
 extern Lisp_Object safe_call1 (Lisp_Object, Lisp_Object);
 extern Lisp_Object safe_call2 (Lisp_Object, Lisp_Object, Lisp_Object);
 extern void init_eval (void);
+#if BYTE_MARK_STACK
 extern void mark_backtrace (void);
+#endif
 extern void syms_of_eval (void);
 
 /* Defined in editfns.c */
@@ -3255,7 +3258,7 @@ extern int read_bytecode_char (int);
 extern Lisp_Object Qbytecode;
 extern void syms_of_bytecode (void);
 extern struct byte_stack *byte_stack_list;
-#ifdef BYTE_MARK_STACK
+#if BYTE_MARK_STACK
 extern void mark_byte_stack (void);
 #endif
 extern void unmark_byte_stack (void);
diff --git a/src/xdisp.c b/src/xdisp.c
index b5ba2090c70..ec9a112996f 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -504,7 +504,7 @@ Lisp_Object Vmessage_stack;
 /* Nonzero means multibyte characters were enabled when the echo area
    message was specified.  */
 
-int message_enable_multibyte;
+static int message_enable_multibyte;
 
 /* Nonzero if we should redraw the mode lines on the next redisplay.  */