-lposix4 not found on php-4.0.4-pl1 configure on Linux RedHat 7.0

See the following debug.log I've tried reinstalling gcc with linuxthreads add-on. did not work. Anyone experience this problem? BTW- PHP_RPATHS is a mounted nsf drive. thanks. CONFIGURE: './configure' '--with-apxs=/opt/apache/bin/apxs' '--enable-track-vars' '--without-mysql' '--with-oracle=/usr/local/caesar/oracle/app/oracle/product/7.3.4' '--enable-sigchild' CC: gcc CFLAGS: -g -O2 CPPFLAGS: -DLINUX=22 -DUSE_HSREGEX -DUSE_EXPAT CXX: CXXFLAGS: INCLUDES: -I/opt/apache/include -I$(top_builddir)/Zend -I/usr/local/caesar/oracle/app/oracle/product/7.3.4/rdbms/demo -I/usr/local/caesar/oracle/app/oracle/product/7.3.4/network/public LDFLAGS: -Wl,-rpath,/usr/local/caesar/oracle/app/oracle/product/7.3.4/lib -L/usr/local/caesar/oracle/app/oracle/product/7.3.4/lib LIBS: -lclient -lsqlnet -lncr -lsqlnet -lclient -lcommon -lgeneric -lsqlnet -lncr -lsqlnet -lclient -lcommon -lgeneric -lepc -lnlsrtl3 -lc3v6 -lcore3 -lnlsrtl3 -lcore3 -lposix4 -ldl -lm -lnsl -lsocket -lresolv -lm -ldl -lcrypt -lnsl -lresolv DLIBS: SAPI: apache PHP_RPATHS: /usr/local/caesar/oracle/app/oracle/product/7.3.4/lib uname -a: Linux csdev12 2.2.16-22 #1 Tue Aug 22 16:49:06 EDT 2000 i686 unknown gcc -o conftest -g -O2 -DLINUX=22 -DUSE_HSREGEX -DUSE_EXPAT -Wl,-rpath,/usr/local/caesar/oracle/app/oracle/product/7.3.4/lib -L/usr/local/caesar/oracle/app/oracle/product/7.3.4/lib conftest.c -lclient -lsqlnet -lncr -lsqlnet -lclient -lcommon -lgeneric -lsqlnet -lncr -lsqlnet -lclient -lcommon -lgeneric -lepc -lnlsrtl3 -lc3v6 -lcore3 -lnlsrtl3 -lcore3 -lposix4 -ldl -lm -lnsl -lsocket -lresolv -lm -ldl -lcrypt -lnsl -lresolv 1>&5 /usr/bin/ld: cannot find -lposix4 collect2: ld returned 1 exit status nospam-jgethoefer@nospam-cybersight.com