exml error centos 6.1

gistfile1.txt

==> exml (compile)
Compiled src/exml.erl
Compiled src/exml_query.erl
Compiled src/exml_event.erl
Compiled src/exml_stream.erl
Compiling /root/sources/mongooseim/deps/exml/c_src/exml_event.c
In file included from /root/sources/mongooseim/deps/exml/c_src/exml_event.c:1:
c_src/exml_event.h:5:19: error: expat.h: No such file or directory
In file included from /root/sources/mongooseim/deps/exml/c_src/exml_event.c:1:
c_src/exml_event.h:10: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘ms’
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:5: warning: type defaults to ‘int’ in declaration of ‘XML_Char’
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:5: error: expected ‘;’, ‘,’ or ‘)’ before ‘*’ token
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:37: warning: type defaults to ‘int’ in declaration of ‘XML_Char’
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:37: error: expected ‘;’, ‘,’ or ‘)’ before ‘*’ token
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:72: warning: type defaults to ‘int’ in declaration of ‘XML_Char’
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:72: error: expected ‘;’, ‘,’ or ‘)’ before ‘*’ token
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:83: warning: type defaults to ‘int’ in declaration of ‘XML_Char’
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:83: error: expected ‘;’, ‘,’ or ‘)’ before ‘*’ token
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:97: warning: type defaults to ‘int’ in declaration of ‘XML_Char’
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:97: error: expected ‘;’, ‘,’ or ‘)’ before ‘*’ token
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:129: error: expected ‘)’ before ‘parser’
/root/sources/mongooseim/deps/exml/c_src/exml_event.c: In function ‘new_parser’:
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:144: error: ‘XML_Parser’ undeclared (first use in this function)
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:144: error: (Each undeclared identifier is reported only once
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:144: error: for each function it appears in.)
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:144: error: expected ‘;’ before ‘parser’
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:148: error: ‘parser’ undeclared (first use in this function)
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:148: warning: implicit declaration of function ‘XML_ParserCreate_MM’
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:148: error: ‘ms’ undeclared (first use in this function)
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:152: warning: implicit declaration of function ‘init_parser’
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:154: error: ‘xml_parser’ undeclared (first use in this function)
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:154: error: expected expression before ‘)’ token
/root/sources/mongooseim/deps/exml/c_src/exml_event.c: In function ‘reset_parser’:
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:164: error: ‘XML_Parser’ undeclared (first use in this function)
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:164: error: ‘parser’ undeclared (first use in this function)
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:171: warning: implicit declaration of function ‘XML_GetUserData’
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:176: error: ‘XML_TRUE’ undeclared (first use in this function)
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:176: warning: implicit declaration of function ‘XML_ParserReset’
/root/sources/mongooseim/deps/exml/c_src/exml_event.c: In function ‘free_parser’:
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:184: error: ‘XML_Parser’ undeclared (first use in this function)
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:184: error: ‘parser’ undeclared (first use in this function)
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:194: warning: implicit declaration of function ‘XML_ParserFree’
/root/sources/mongooseim/deps/exml/c_src/exml_event.c: In function ‘parse’:
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:201: error: ‘XML_Parser’ undeclared (first use in this function)
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:201: error: ‘parser’ undeclared (first use in this function)
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:220: warning: implicit declaration of function ‘XML_SetUserData’
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:222: warning: implicit declaration of function ‘XML_Parse’
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:225: warning: implicit declaration of function ‘XML_GetErrorCode’
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:226: warning: implicit declaration of function ‘XML_ErrorString’
/root/sources/mongooseim/deps/exml/c_src/exml_event.c:226: warning: cast to pointer from integer of different size
ERROR: compile failed while processing /root/sources/mongooseim/deps/exml: rebar_abort
make: *** [compile] Error 1

you should install lib expat-devel. I work ok for me.
My OS: CentOS 6.4