Fix runtime errors on 64-bit architectures (tested under MacOS Catalina).

* Ignoring implicit function declaration warnings resulted in pointers
   being clobbered to int type.

gcc/config/m68k/amigaos.c

@@ -27,6 +27,8 @@ Boston, MA 02111-1307, USA.  */
 #include "tree.h"
 #include "flags.h"
 #include "expr.h"
+
+extern void error (), error_with_decl ();
 
 /* Baserel support.  */
 
@@ -367,7 +369,7 @@ amigaos_function_arg(CUMULATIVE_ARGS *cum, enum machine_mode mode,
       return gen_rtx(REG, mode, cum->last_arg_reg);
     }
   else
-    return (struct rtx_def *)m68k_function_arg(cum, mode, type);
+    return m68k_function_arg(cum, mode, type);
 }
 
 /* Return zero if the attributes on TYPE1 and TYPE2 are incompatible,

gcc/config/m68k/amigaos.h

@@ -474,6 +474,7 @@ while (0)
 /* Given that symbolic_operand(X), return TRUE if no special
    base relative relocation is necessary */
 
+int read_only_operand ();
 #define LEGITIMATE_BASEREL_OPERAND_P(X)					\
   (flag_pic >= 3 && read_only_operand (X))
 
@@ -498,6 +499,7 @@ while (0)
    On the Amiga we use this to indicate if references to a symbol should be
    absolute or base relative.  */
 
+int amigaos_put_in_text ();
 #define ENCODE_SECTION_INFO(DECL)					\
 do									\
   {									\
@@ -608,6 +610,7 @@ while (0)
 /* Determine if the epilogue should be output as RTL.
    Don't do it if preserving a4.  */
 
+int amigaos_restore_a4 ();
 #undef USE_RETURN_INSN
 #define USE_RETURN_INSN (use_return_insn () && ! amigaos_restore_a4 ())
 
@@ -617,6 +620,7 @@ while (0)
    ARGS is a valid machine specific attribute for DECL.  The attributes
    in ATTRIBUTES have previously been assigned to DECL.  */
 
+int valid_amigaos_decl_attribute ();
 #define VALID_MACHINE_DECL_ATTRIBUTE(DECL, ATTRIBUTES, IDENTIFIER, ARGS) \
   (valid_amigaos_decl_attribute ((DECL), (IDENTIFIER)))
 
@@ -624,6 +628,7 @@ while (0)
    ARGS is a valid machine specific attribute for TYPE.  The attributes
    in ATTRIBUTES have previously been assigned to TYPE.  */
 
+int valid_amigaos_type_attribute ();
 #undef VALID_MACHINE_TYPE_ATTRIBUTE
 #define VALID_MACHINE_TYPE_ATTRIBUTE(TYPE, ATTRIBUTES, IDENTIFIER, ARGS) \
   (valid_amigaos_type_attribute ((TYPE), (ATTRIBUTES), (IDENTIFIER), (ARGS)))
@@ -662,6 +667,7 @@ struct amigaos_args
    for a call to a function whose data type is FNTYPE.
    For a library call, FNTYPE is 0.  */
 
+void amigaos_init_cumulative_args ();
 #undef INIT_CUMULATIVE_ARGS
 #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT)		\
   (amigaos_init_cumulative_args(&(CUM), (FNTYPE)))
@@ -670,6 +676,7 @@ struct amigaos_args
    of mode MODE and data type TYPE.
    (TYPE is null for libcalls where that information may not be available.)  */
 
+void amigaos_function_arg_advance ();
 #undef FUNCTION_ARG_ADVANCE
 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)			\
   (amigaos_function_arg_advance (&(CUM)))
@@ -677,14 +684,16 @@ struct amigaos_args
 /* A C expression that controls whether a function argument is passed
    in a register, and which register. */
 
+struct rtx_def *amigaos_function_arg ();
 #undef FUNCTION_ARG
 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
-  ((struct rtx_def *)amigaos_function_arg (&(CUM), (MODE), (TYPE)))
+  (amigaos_function_arg (&(CUM), (MODE), (TYPE)))
 
 /* A C expression whose value is zero if the attributes on TYPE1 and
    TYPE2 are incompatible, one if they are compatible, and two if they
    are nearly compatible (which causes a warning to be generated).  */
 
+int comp_amigaos_type_attributes ();
 #undef COMP_TYPE_ATTRIBUTES
 #define COMP_TYPE_ATTRIBUTES(TYPE1, TYPE2) 				\
   (comp_amigaos_type_attributes ((TYPE1), (TYPE2)))
@@ -741,6 +750,7 @@ struct rtx_def* gen_stack_cleanup_call ();
 #undef TARGET_ALTERNATE_ALLOCATE_STACK
 #define TARGET_ALTERNATE_ALLOCATE_STACK 1
 
+void amigaos_alternate_allocate_stack ();
 #define ALTERNATE_ALLOCATE_STACK(OPERANDS)				\
 do									\
   {									\

gcc/config/m68k/m68k.h

@@ -2187,6 +2187,9 @@ extern void print_operand ();
 extern void notice_update_cc ();
 extern void finalize_pic ();
 extern void override_options ();
+extern void m68k_init_cumulative_args (), m68k_function_arg_advance ();
+extern struct rtx_def *m68k_function_arg ();
+extern int comp_m68k_type_attributes (), valid_m68k_type_attribute ();
 
 
 /*

gcc/flow.c

@@ -273,6 +273,8 @@ static rtx label_value_list;
 #define SET_INSN_VOLATILE(INSN) bitmap_set_bit (uid_volatile, INSN_UID (INSN))
 static bitmap uid_volatile;
 
+int function_arg_regno_p ();
+
 /* Forward declarations */
 static int count_basic_blocks		PROTO((rtx));
 static rtx find_basic_blocks_1		PROTO((rtx, rtx*));

gcc/optabs.c

@@ -36,6 +36,8 @@ Boston, MA 02111-1307, USA.  */
 #include "recog.h"
 #include "reload.h"
 
+extern int significand_size ();
+
 /* Each optab contains info on how this target machine
    can perform a particular operation
    for all sizes and kinds of operands.

gcc/protoize.c

@@ -69,6 +69,7 @@ Boston, MA 02111-1307, USA.  */
 #endif
 #endif
 #include <setjmp.h>
+#include <alloca.h>
 
 /* Some systems like Linux don't declare rindex if _POSIX_SOURCE is declared,
    but it normally does declare it.  This means that configure thinks we don't

libiberty/vfork.c

@@ -1,6 +1,8 @@
 /* Emulate vfork using just plain fork, for systems without a real vfork.
    This function is in the public domain. */
 
+int fork ();
+
 int
 vfork ()
 {

texinfo/intl/bindtextdom.c

@@ -25,6 +25,7 @@
 # ifdef HAVE_MALLOC_H
 #  include <malloc.h>
 # else
+void *malloc();
 void free ();
 # endif
 #endif

texinfo/intl/explodename.c

@@ -21,6 +21,9 @@
 
 #if defined STDC_HEADERS || defined _LIBC
 # include <stdlib.h>
+#else
+void *malloc ();
+void free ();
 #endif
 #include <string.h>
 #include <sys/types.h>

texinfo/intl/finddomain.c

@@ -31,6 +31,7 @@
 # ifdef HAVE_MALLOC_H
 #  include <malloc.h>
 # else
+void *malloc ();
 void free ();
 # endif
 #endif

texinfo/intl/l10nflist.c

@@ -46,6 +46,9 @@
 
 #if defined STDC_HEADERS || defined _LIBC
 # include <stdlib.h>
+#else
+void *malloc ();
+void free ();
 #endif
 
 #include "loadinfo.h"

texinfo/intl/loadmsgcat.c

@@ -25,6 +25,9 @@
 
 #if defined STDC_HEADERS || defined _LIBC
 # include <stdlib.h>
+#else
+void *malloc ();
+void free ();
 #endif
 
 #if defined HAVE_UNISTD_H || defined _LIBC

texinfo/intl/localealias.c

@@ -44,10 +44,13 @@ char *alloca ();
 #if defined STDC_HEADERS || defined _LIBC
 # include <stdlib.h>
 #else
+void *bsearch ();
 char *getenv ();
+void qsort ();
 # ifdef HAVE_MALLOC_H
 #  include <malloc.h>
 # else
+void *malloc ();
 void free ();
 # endif
 #endif

texinfo/intl/textdomain.c

@@ -22,6 +22,8 @@
 
 #if defined STDC_HEADERS || defined _LIBC
 # include <stdlib.h>
+#else
+void free ();
 #endif
 
 #if defined STDC_HEADERS || defined HAVE_STRING_H || defined _LIBC

texinfo/lib/getopt.c

@@ -200,6 +200,8 @@ static char *posixly_correct;
 #include <string.h>
 #define	my_index	strchr
 #else
+size_t strlen ();
+int strcmp (), strncmp ();
 
 /* Avoid depending on library functions or files
    whose names are inconsistent.  */

texinfo/lib/xmalloc.c

@@ -30,7 +30,7 @@
 #include <sys/types.h>
 
 extern void *malloc (), *realloc ();
-static void memory_error_and_abort ();
+static void abort(), memory_error_and_abort ();
 
 /* **************************************************************** */
 /*								    */

texinfo/makeinfo/makeinfo.c

@@ -50,6 +50,10 @@ char *alloca ();
 # endif
 #endif
 
+void *malloc ();
+void free (), qsort (), abort (), exit ();
+int atoi ();
+
 /* We'd like to take advantage of _doprnt if it's around, a la error.c,
    but then we'd have no VA_SPRINTF.  */
 #if HAVE_VPRINTF
@@ -434,6 +438,10 @@ void undefindex (), top_defindex (), gen_defindex ();
 void define_user_command ();
 void free_pending_notes (), output_pending_notes ();
 
+int validate (), search_forward (), set_paragraph_indent (), self_delimiting (),
+    set_footnote_style ();
+void end_multitable (), multitable_item ();
+
 char **get_brace_args ();
 char *expansion ();
 int array_len ();

texinfo/makeinfo/multi.c

@@ -22,6 +22,13 @@
 
 #define MAXCOLS 100             /* remove this limit later @@ */
 
+void inhibit_output_flushing (), uninhibit_output_flushing (), insert (),
+     close_paragraph (), line_error (), init_paragraph (), error (),
+     cm_noindent (), exit (), warning (), flush_output ();
+
+int setup_output_environment (), select_output_environment (),
+    setup_multitable_parameters ();
+
 
 /*
  * Output environments.  This is a hack grafted onto existing