PHP4 Configuration problems

Hi, We are trying to configure PHP4.0. as apache module with informix support on a Sun machine with Solaris 2.6. The configuration process aborts and we a unable to fix the problem. This is the debug.log file: CONFIGURE: './configure' '--with-informix' '--with-apache=../apache_1.3.14' '--enable-track-vars' CC: cc CFLAGS: -g -I/usr/informix/desa/incl/esql CPPFLAGS: -D_POSIX_PTHREAD_SEMANTICS CXX: CXXFLAGS: INCLUDES: -I/web/apache_1.3.14/src/include -I/web/apache_1.3.14/src/os/unix -I$(top_builddir)/Zend -I$(top_srcdir) -I/usr/informix/desa/incl/esql -I/web/php-4.0.3pl1/ext/mysql/libmysql LDFLAGS: -R/usr/ucblib -L/usr/ucblib -R/usr/informix/desa/lib -L/usr/informix/desa/lib -R/usr/informix/desa/lib/esql -L/usr/informix/desa/lib/esql -R/web/php-4.0.3pl1/ext/informix -L/web/php-4.0.3pl1/ext/informix LIBS: -lresolv -lresolv -lm -ldl -lcrypt -lnsl -lsocket -lsocket -lifsql -lifasf -lifgen -lifos -lifgls -lnsl -lsocket -laio -ldl -lelf -lphp_ifx -lifglx DLIBS: SAPI: apache PHP_RPATHS: /usr/ucblib /usr/informix/desa/lib /usr/informix/desa/lib/esql /web/php-4.0.3pl1/ext/informix uname -a: SunOS e5000 5.6 Generic_105181-16 sun4u sparc SUNW,Ultra-Enterprise cc -o conftest -g -I/usr/informix/desa/incl/esql -D_POSIX_PTHREAD_SEMANTICS -R/usr/ucblib -L/usr/ucblib -R/usr/informix/desa/lib -L/usr/informix/desa/lib -R/usr/informix/desa/lib/esql -L/usr/informix/desa/lib/esql -R/web/php-4.0.3pl1/ext/informix -L/web/php-4.0.3pl1/ext/informix conftest.c -lresolv -lresolv -lm -ldl -lcrypt -lnsl -lsocket -lsocket -lifsql -lifasf -lifgen -lifos -lifgls -lnsl -lsocket -laio -ldl -lelf -lphp_ifx -lifglx 1>&5 Undefined first referenced symbol in file ceil /usr/informix/desa/lib/esql/libifsql.so fabs /usr/informix/desa/lib/esql/libifgen.so ld: fatal: Symbol referencing errors. No output written to conftest Please, can you help us? Thanks. Miguel Carrion