trouble building php-4.0.7RC3

I try to build php-4.0.7RC3 on a RedHat 7.1 i386 box. Currently I run php-4.0.7RC1 which build witout problems but with RC3 it does not build. ./configure --myoptions runs through without apparent errors but at the end I get this "Something is likely to be messed up here ..." error message :-(( my configure.log shows a lot of these undefined references: configure:57892: gcc -o conftest -g -O2 -DLINUX=2 -DNO_DBM_REWRITEMAP -DUSE_HSREGEX -DUSE_EXPAT -Wl,-rpath,/usr/X11R6/lib -L/usr/X11R6/lib -Wl,-rpath,/usr/lib/mysql -L/usr/lib/mysql conftest.c -ldl -lsablot -lxmltok -lxmlparse -lmysqlclient -lz -lgd -lt1 -lX11 -lXpm -ljpeg -lz -lxml2 -lz -lcrypt -lresolv -lm -ldl -lnsl -lresolv -lcrypt 1>&5 /usr/lib/gcc-lib/i386-redhat-linux/2.96/../../../libsablot.so: undefined reference to `XML_ParserCreateNS' /usr/lib/gcc-lib/i386-redhat-linux/2.96/../../../libsablot.so: undefined reference to `XML_SetParamEntityParsing' /usr/lib/gcc-lib/i386-redhat-linux/2.96/../../../libsablot.so: undefined reference to `XML_SetEncoding' /usr/lib/gcc-lib/i386-redhat-linux/2.96/../../../libsablot.so: undefined reference to `XML_SetCommentHandler' /usr/lib/gcc-lib/i386-redhat-linux/2.96/../../../libsablot.so: undefined reference to `XML_SetNamespaceDeclHandler' collect2: ld returned 1 exit status I have sablotron-0.65, expat-1.95 installed any ideas what's wrong here? thanks Jens