fix some compilation warnings, in anticipation of moving to libguile/

* src/Makefile.am: Use standard guile CFLAGS, which has -Werror and
  -Wmissing-prototypes.

* src/frames.h:
* src/instructions.h:
* src/objcodes.h:
* src/programs.h:
* src/vm.h:
* src/vm.c: Fix warnings, mostly about prototypes.

* src/vm_system.c: Fix a tricky x-is-not-initialized error. Thanks, GCC!

src/Makefile.am

@@ -3,10 +3,6 @@ bin_SCRIPTS = guilec guile-disasm
 guile_vm_SOURCES = guile-vm.c
 guile_vm_LDADD = libguile-vm.la ../libguile/libguile.la
 
-AM_CFLAGS = -Wall -g
-
-CFLAGS:=$(filter-out -Wmissing-prototypes,$(CFLAGS))
-
 lib_LTLIBRARIES = libguile-vm.la
 libguile_vm_la_SOURCES =						\
 	bootstrap.h 							\

src/frames.h

@@ -104,6 +104,13 @@ extern scm_t_bits scm_tc16_heap_frame;
 #define SCM_HEAP_FRAME_POINTER(f)	(SCM_HEAP_FRAME_DATA (f) + 2)
 #define SCM_VALIDATE_HEAP_FRAME(p,x)	SCM_MAKE_VALIDATE (p, x, HEAP_FRAME_P)
 
+extern SCM scm_frame_program (SCM frame);
+extern SCM scm_frame_local_ref (SCM frame, SCM index);
+extern SCM scm_frame_local_set_x (SCM frame, SCM index, SCM val);
+extern SCM scm_frame_return_address (SCM frame);
+extern SCM scm_frame_dynamic_link (SCM frame);
+extern SCM scm_frame_external_link (SCM frame);
+
 extern SCM scm_c_make_heap_frame (SCM *fp);
 extern void scm_bootstrap_frames (void);
 extern void scm_init_frames (void);

src/instructions.h

@@ -79,6 +79,14 @@ struct scm_instruction {
 extern struct scm_instruction scm_instruction_table[];
 extern struct scm_instruction *scm_lookup_instruction (SCM name);
 
+extern SCM scm_instruction_list (void);
+extern SCM scm_instruction_p (SCM obj);
+extern SCM scm_instruction_length (SCM inst);
+extern SCM scm_instruction_pops (SCM inst);
+extern SCM scm_instruction_pushes (SCM inst);
+extern SCM scm_instruction_to_opcode (SCM inst);
+extern SCM scm_opcode_to_instruction (SCM op);
+
 extern void scm_bootstrap_instructions (void);
 extern void scm_init_instructions (void);
 

src/objcodes.h

@@ -62,6 +62,9 @@ extern scm_t_bits scm_tc16_objcode;
 
 extern SCM scm_load_objcode (SCM file);
 extern SCM scm_objcode_to_program (SCM objcode);
+extern SCM scm_objcode_p (SCM obj);
+extern SCM scm_bytecode_to_objcode (SCM bytecode, SCM nlocs, SCM nexts);
+extern SCM scm_objcode_to_u8vector (SCM objcode);
 
 extern void scm_bootstrap_objcodes (void);
 extern void scm_init_objcodes (void);

src/programs.h

@@ -72,6 +72,15 @@ extern scm_t_bits scm_tc16_program;
 extern SCM scm_c_make_program (void *addr, size_t size, SCM holder);
 extern SCM scm_c_make_closure (SCM program, SCM external);
 
+extern SCM scm_program_p (SCM obj);
+extern SCM scm_program_base (SCM program);
+extern SCM scm_program_arity (SCM program);
+extern SCM scm_program_meta (SCM program);
+extern SCM scm_program_objects (SCM program);
+extern SCM scm_program_external (SCM program);
+extern SCM scm_program_external_set_x (SCM program, SCM external);
+extern SCM scm_program_bytecode (SCM program);
+
 extern void scm_bootstrap_programs (void);
 extern void scm_init_programs (void);
 

src/vm.c

@@ -44,6 +44,7 @@
 #endif
 
 #include <string.h>
+#include "bootstrap.h"
 #include "frames.h"
 #include "instructions.h"
 #include "objcodes.h"
@@ -175,7 +176,9 @@ vm_heapify_frames_1 (struct scm_vm *vp, SCM *fp, SCM *sp, SCM **destp)
 {
   SCM frame;
   SCM *dl = SCM_FRAME_DYNAMIC_LINK (fp);
+#if 0
   SCM *src = SCM_FRAME_UPPER_ADDRESS (fp);
+#endif
   SCM *dest = SCM_FRAME_LOWER_ADDRESS (fp);
 
   if (!dl)
@@ -336,7 +339,7 @@ SCM_DEFINE (scm_vm_version, "vm-version", 0, 0, 0,
 #undef FUNC_NAME
 
 SCM_DEFINE (scm_the_vm, "the-vm", 0, 0, 0,
-	    (),
+	    (void),
 	    "")
 #define FUNC_NAME s_scm_the_vm
 {

src/vm.h

@@ -80,6 +80,30 @@ extern SCM scm_vm_apply (SCM vm, SCM program, SCM args);
 extern SCM scm_vm_option_ref (SCM vm, SCM key);
 extern SCM scm_vm_option_set_x (SCM vm, SCM key, SCM val);
 
+extern SCM scm_vm_version (void);
+extern SCM scm_the_vm (void);
+extern SCM scm_vm_p (SCM obj);
+extern SCM scm_vm_ip (SCM vm);
+extern SCM scm_vm_sp (SCM vm);
+extern SCM scm_vm_fp (SCM vm);
+extern SCM scm_vm_boot_hook (SCM vm);
+extern SCM scm_vm_halt_hook (SCM vm);
+extern SCM scm_vm_next_hook (SCM vm);
+extern SCM scm_vm_break_hook (SCM vm);
+extern SCM scm_vm_enter_hook (SCM vm);
+extern SCM scm_vm_apply_hook (SCM vm);
+extern SCM scm_vm_exit_hook (SCM vm);
+extern SCM scm_vm_return_hook (SCM vm);
+extern SCM scm_vm_option (SCM vm, SCM key);
+extern SCM scm_set_vm_option_x (SCM vm, SCM key, SCM val);
+extern SCM scm_vm_stats (SCM vm);
+extern SCM scm_vm_this_frame (SCM vm);
+extern SCM scm_vm_last_frame (SCM vm);
+extern SCM scm_vm_last_ip (SCM vm);
+extern SCM scm_vm_save_stack (SCM vm);
+extern SCM scm_vm_fetch_code (SCM vm);
+extern SCM scm_vm_fetch_stack (SCM vm);
+
 extern SCM scm_load_compiled_with_vm (SCM file);
 
 extern void scm_init_vm (void);

src/vm_system.c

@@ -490,14 +490,15 @@ VM_DEFINE_INSTRUCTION (call, "call", 1, -1, 1)
    */
   if (SCM_VM_CONT_P (x))
     {
+      program = x;
     vm_call_cc:
       /* Check the number of arguments */
       if (nargs != 1)
-	scm_wrong_num_args (x);
+	scm_wrong_num_args (program);
 
       /* Reinstate the continuation */
       EXIT_HOOK ();
-      reinstate_vm_cont (vp, x);
+      reinstate_vm_cont (vp, program);
       CACHE_REGISTER ();
       program = SCM_FRAME_PROGRAM (fp);
       CACHE_PROGRAM ();
@@ -607,13 +608,15 @@ VM_DEFINE_INSTRUCTION (tail_call, "tail-call", 1, -1, 1)
       *sp = scm_apply (x, args, SCM_EOL);
       goto vm_return;
     }
+
+  program = x;
+
   /*
    * Continuation call
    */
-  if (SCM_VM_CONT_P (x))
+  if (SCM_VM_CONT_P (program))
     goto vm_call_cc;
 
-  program = x;
   goto vm_error_wrong_type_apply;
 }