i install subversion-1.6.4 ,when "make",error occurs.
so i change another version subversion-1.4.2,
it's still error,like below:

subversion/libsvn_subr/xml.c: At top level:
subversion/libsvn_subr/xml.c:321: error: syntax error before '*' token
subversion/libsvn_subr/xml.c: In function `expat_data_handler':
subversion/libsvn_subr/xml.c:323: error: `userData' undeclared (first use in this function)
subversion/libsvn_subr/xml.c:325: error: dereferencing pointer to incomplete type
subversion/libsvn_subr/xml.c:325: error: dereferencing pointer to incomplete type
subversion/libsvn_subr/xml.c:325: error: `s' undeclared (first use in this function)
subversion/libsvn_subr/xml.c:325: error: `len' undeclared (first use in this function)
subversion/libsvn_subr/xml.c: In function `svn_xml_make_parser':
subversion/libsvn_subr/xml.c:341: error: `XML_Parser' undeclared (first use in this function)
subversion/libsvn_subr/xml.c:341: error: syntax error before "parser"
subversion/libsvn_subr/xml.c:343: error: `parser' undeclared (first use in this function)
subversion/libsvn_subr/xml.c:353: error: dereferencing pointer to incomplete type
subversion/libsvn_subr/xml.c:353: error: dereferencing pointer to incomplete type
subversion/libsvn_subr/xml.c:355: error: dereferencing pointer to incomplete type
subversion/libsvn_subr/xml.c:356: error: dereferencing pointer to incomplete type
subversion/libsvn_subr/xml.c:357: error: dereferencing pointer to incomplete type
subversion/libsvn_subr/xml.c:358: error: dereferencing pointer to incomplete type
subversion/libsvn_subr/xml.c:359: error: dereferencing pointer to incomplete type
subversion/libsvn_subr/xml.c:360: error: dereferencing pointer to incomplete type
subversion/libsvn_subr/xml.c: In function `svn_xml_free_parser':
subversion/libsvn_subr/xml.c:374: error: dereferencing pointer to incomplete type
subversion/libsvn_subr/xml.c:377: error: dereferencing pointer to incomplete type
subversion/libsvn_subr/xml.c: In function `svn_xml_parse':
subversion/libsvn_subr/xml.c:393: error: dereferencing pointer to incomplete type
subversion/libsvn_subr/xml.c:401: error: dereferencing pointer to incomplete type
subversion/libsvn_subr/xml.c:402: error: dereferencing pointer to incomplete type
subversion/libsvn_subr/xml.c:410: error: dereferencing pointer to incomplete type
subversion/libsvn_subr/xml.c:412: error: dereferencing pointer to incomplete type
subversion/libsvn_subr/xml.c: In function `svn_xml_signal_bailout':
subversion/libsvn_subr/xml.c:426: error: dereferencing pointer to incomplete type
subversion/libsvn_subr/xml.c:427: error: dereferencing pointer to incomplete type
subversion/libsvn_subr/xml.c:431: error: dereferencing pointer to incomplete type
make: *** [subversion/libsvn_subr/xml.lo] Error 1

Why not use your package manager to install subversion? Try installing expat and/or libxml2 along with their development files and try the build again. I don't remember if you need either one or both.

thank you for your answer, just now, i installed libxml2 and expat,and then i compiled svn again,when i "make",the error showed:

/usr/bin/ld: cannot find -lldap
collect2: ld returned 1 exit status
make: *** [subversion/libsvn_subr/libsvn_subr-1.la] Error 1

how can i go on next step?

You're missing the LDAP library. Either install the LDAP library or see if there is an option to pass to the configure script to disable LDAP support. Check the output of ./configure --help to see if there is an option to disable LDAP.