compile-time definition of intptr type

config/ac-macros/misc.m4:
  remove unnecessary macro
configure.in:
  use AC_CHECK_SIZEOF when appropriate

config/ac-macros/misc.m4

 # Local macros for automake & autoconf
 
-# A local version of AC_CHECK_SIZEOF that includes sys/types.h
-dnl MYSQL_CHECK_SIZEOF(TYPE [, CROSS-SIZE])
-AC_DEFUN([MYSQL_CHECK_SIZEOF],
-[changequote(<<, >>)dnl
-dnl The name to #define.
-define(<<AC_TYPE_NAME>>, translit(sizeof_$1, [a-z *], [A-Z_P]))dnl
-dnl The cache variable name.
-define(<<AC_CV_NAME>>, translit(ac_cv_sizeof_$1, [ *], [_p]))dnl
-changequote([, ])dnl
-AC_MSG_CHECKING(size of $1)
-AC_CACHE_VAL(AC_CV_NAME,
-[AC_TRY_RUN([#include <stdio.h>
-#include <sys/types.h>
-#if STDC_HEADERS
-#include <stdlib.h>
-#include <stddef.h>
-#endif
-main()
-{
-  FILE *f=fopen("conftestval", "w");
-  if (!f) exit(1);
-  fprintf(f, "%d\n", sizeof($1));
-  exit(0);
-}], AC_CV_NAME=`cat conftestval`, AC_CV_NAME=0, ifelse([$2], , , AC_CV_NAME=$2))])dnl
-AC_MSG_RESULT($AC_CV_NAME)
-AC_DEFINE_UNQUOTED(AC_TYPE_NAME, $AC_CV_NAME, [ ])
-undefine([AC_TYPE_NAME])dnl
-undefine([AC_CV_NAME])dnl
-])
-
 #---START: Used in for client configure
 AC_DEFUN([MYSQL_TYPE_ACCEPT],
 [ac_save_CXXFLAGS="$CXXFLAGS"

configure.in

@@ -1687,7 +1687,7 @@ then
   AC_MSG_ERROR("MySQL needs a long long type.")
 fi
 # off_t is not a builtin type
-MYSQL_CHECK_SIZEOF(off_t, 4)
+AC_CHECK_SIZEOF(off_t, 4)
 if test "$ac_cv_sizeof_off_t" -eq 0
 then
   AC_MSG_ERROR("MySQL needs a off_t type.")

include/my_atomic.h

@@ -135,7 +135,13 @@ make_atomic_swap(ptr)
 #undef _atomic_h_cleanup_
 #endif
 
-typedef int32 intptr; /* TODO configure check */
+#if SIZEOF_CHARP == SIZEOF_INT
+typedef int intptr;
+#elif SIZEOF_CHARP == SIZEOF_LONG
+typedef long intptr;
+#else
+#error
+#endif
 
 #define MY_ATOMIC_OK       0
 #define MY_ATOMIC_NOT_1CPU 1