Merge changes to acinclude.m4 that are now in config/ac-macros/misc.m4

config/ac-macros/misc.m4:
  Add detection of struct rlimit

config/ac-macros/misc.m4

@@ -34,10 +34,10 @@ undefine([AC_CV_NAME])dnl
 AC_DEFUN([MYSQL_TYPE_ACCEPT],
 [ac_save_CXXFLAGS="$CXXFLAGS"
 AC_CACHE_CHECK([base type of last arg to accept], mysql_cv_btype_last_arg_accept,
-AC_LANG_SAVE
-AC_LANG_CPLUSPLUS
+AC_LANG_PUSH(C++)
 if test "$ac_cv_prog_gxx" = "yes"
 then
+  # Add -Werror, remove -fbranch-probabilities (Bug #268)
   CXXFLAGS=`echo $CXXFLAGS -Werror | sed 's/-fbranch-probabilities//'`
 fi
 mysql_cv_btype_last_arg_accept=none
@@ -64,7 +64,7 @@ fi
 if test "$mysql_cv_btype_last_arg_accept" = "none"; then
 mysql_cv_btype_last_arg_accept=int
 fi)
-AC_LANG_RESTORE
+AC_LANG_POP(C++)
 AC_DEFINE_UNQUOTED([SOCKET_SIZE_TYPE], [$mysql_cv_btype_last_arg_accept],
                    [The base type of the last arg to accept])
 CXXFLAGS="$ac_save_CXXFLAGS"
@@ -90,6 +90,35 @@ then
 fi
 ])
 
+#---START: Figure out whether to use 'struct rlimit' or 'struct rlimit64'
+AC_DEFUN([MYSQL_TYPE_STRUCT_RLIMIT],
+[ac_save_CXXFLAGS="$CXXFLAGS"
+AC_CACHE_CHECK([struct type to use with setrlimit], mysql_cv_btype_struct_rlimit,
+AC_LANG_PUSH(C++)
+if test "$ac_cv_prog_gxx" = "yes"
+then
+  # Add -Werror, remove -fbranch-probabilities (Bug #268)
+  CXXFLAGS=`echo $CXXFLAGS -Werror | sed 's/-fbranch-probabilities//'`
+fi
+mysql_cv_btype_struct_rlimit=none
+[AC_TRY_COMPILE([#if defined(inline)
+#undef inline
+#endif
+#include <stdlib.h>
+#include <sys/resource.h>
+],
+[struct rlimit64 rl; setrlimit(RLIMIT_CORE, &rl);],
+mysql_cv_btype_struct_rlimit="struct rlimit64")]
+if test "$mysql_cv_btype_struct_rlimit" = "none"; then
+mysql_cv_btype_struct_rlimit="struct rlimit"
+fi)
+AC_LANG_POP(C++)
+AC_DEFINE_UNQUOTED([STRUCT_RLIMIT], [$mysql_cv_btype_struct_rlimit],
+                   [The struct rlimit type to use with setrlimit])
+CXXFLAGS="$ac_save_CXXFLAGS"
+])
+#---END:
+
 AC_DEFUN([MYSQL_TIMESPEC_TS],
 [AC_CACHE_CHECK([if struct timespec has a ts_sec member], mysql_cv_timespec_ts,
 [AC_TRY_COMPILE([#include <pthread.h>