lftp on aix 5.3

using lftp 3.0.13 which compiled on aix 5.1
lftp 3.3.0
lftp 3.5.6
lftp 3.5.9

here are results of ./configure

checking wchar.h presence... yes
configure: WARNING: wchar.h: present but cannot be compiled
configure: WARNING: wchar.h:     check for missing prerequisite headers?
configure: WARNING: wchar.h: see the Autoconf documentation
configure: WARNING: wchar.h:     section "Present But Cannot Be Compiled"
configure: WARNING: wchar.h: proceeding with the preprocessor's result
configure: WARNING: wchar.h: in the future, the compiler will take 
precedence
configure: WARNING:     ## ------------------------------------ ##
configure: WARNING:     ## Report this to [email protected] ##
configure: WARNING:     ## ------------------------------------ ##



checking wctype.h presence... yes
configure: WARNING: wctype.h: present but cannot be compiled
configure: WARNING: wctype.h:     check for missing prerequisite headers?
configure: WARNING: wctype.h: see the Autoconf documentation
configure: WARNING: wctype.h:     section "Present But Cannot Be Compiled"
configure: WARNING: wctype.h: proceeding with the preprocessor's result
configure: WARNING: wctype.h: in the future, the compiler will take 
precedence
configure: WARNING:     ## ------------------------------------ ##
configure: WARNING:     ## Report this to [email protected] ##
configure: WARNING:     ## ------------------------------------ ##



checking term.h usability... no
checking term.h presence... yes
configure: WARNING: term.h: present but cannot be compiled
configure: WARNING: term.h:     check for missing prerequisite headers?
configure: WARNING: term.h: see the Autoconf documentation
configure: WARNING: term.h:     section "Present But Cannot Be Compiled"
configure: WARNING: term.h: proceeding with the preprocessor's result
configure: WARNING: term.h: in the future, the compiler will take 
precedence
configure: WARNING:     ## ------------------------------------ ##
configure: WARNING:     ## Report this to [email protected] ##
configure: WARNING:     ## ------------------------------------ ##


# make
Making all in include
       cd .. && make  am--refresh
       cd .. && /bin/sh /home/lindadl/lftp/missing --run autoheader
configure.ac:2: error: Autoconf version 2.60 or higher is required
configure.ac:2: the top level
autom4te: /usr/linux/bin/m4 failed with exit status: 63
autoheader: /opt/freeware/bin/autom4te failed with exit status: 63
WARNING: `autoheader' is probably too old.  You should only need it if
        you modified `acconfig.h' or `configure.ac'.  You might want
        to install the `Autoconf' and `GNU m4' packages.  Grab them
        from any GNU archive site.
touch: 0652-046 Cannot create [include/config.h].in.
       rm -f stamp-h1
       touch ./config.h.in
       cd .. && make  am--refresh
       cd .. && /bin/sh ./config.status include/config.h
config.status: creating include/config.h
config.status: include/config.h is unchanged
       make  all-am
       cd .. && make  am--refresh
       cd .. && make  am--refresh
Target "all-am" is up to date.
Making all in readline-4.3
       rm -f readline.o
       gcc -c -DHAVE_CONFIG_H   -I. -I. -I/usr/local/include 
-DRL_LIBRARY_VERSION='"4.3"' -g -O readline.c
In file included from rlmbutil.h:36,
                from readline.c:55:
/usr/local/include/wchar.h:299: error: parse error before 'mbstate_t'
/usr/local/include/wchar.h:302: error: parse error before 'mbstate_t'
make: 1254-004 The error code from the last command is 1.


Stop.
make: 1254-004 The error code from the last command is 1.


Stop.