It is unclear to me what the default sizeof apr_size_t is on a 64 bit platform.  Is it 32 or 64?
 
 
I do not see the check for AC_CHECK_TYPE(size_t,) in the configure.
 
if test "$ac_cv_type_size_t" = "yes"; then
    size_t_value="size_t"
else
    size_t_value="apr_int32_t"
fi


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