Error compiling PHP

./configure --with-mysql --with-apxs=/usr/local/apache/bin/apxs --prefix=/us r/local/php --enable-ftp --with-gd --with-pgsql Works OK then Make and I get: /bin/sh /home/soft/src/php-4.0.5/libtool --silent --mode=compile gcc -I. -I/home/soft/src/php-4.0.5/ -I/home/soft/src/php-4.0.5/main -I/home /soft/src/php-4.0.5 -I/usr/local/apache/include -I/home/soft/src/php-4.0.5/Z end -I/home/soft/src/php-4.0.5/ext/mysql/libmysql -I/home/soft/src/php-4.0.5 /ext/xml/expat/xmltok -I/home/soft/src/php-4.0.5/ext/xml/expat/xmlparse -I/h ome/soft/src/php-4.0.5/TSRM -DLINUX=22 -DUSE_HSREGEX -DUSE_EXPAT -DSUPPORT_ UTF8 -DXML_BYTE_ORDER=12 -g -O2 -c stub.c /bin/sh /home/soft/src/php-4.0.5/libtool --silent --mode=link gcc -I. -I/home/soft/src/php-4.0.5/ -I/home/soft/src/php-4.0.5/main -I/home /soft/src/php-4.0.5 -I/usr/local/apache/include -I/home/soft/src/php-4.0.5/Z end -I/home/soft/src/php-4.0.5/ext/mysql/libmysql -I/home/soft/src/php-4.0.5 /ext/xml/expat/xmltok -I/home/soft/src/php-4.0.5/ext/xml/expat/xmlparse -I/h ome/soft/src/php-4.0.5/TSRM -DLINUX=22 -DUSE_HSREGEX -DUSE_EXPAT -DSUPPORT_ UTF8 -DXML_BYTE_ORDER=12 -g -O2 -o libphp4.la -rpath /home/soft/src/php-4.0.5/libs -avoid-version stub.lo Zend/libZend.la sapi/apache/libsapi.la main/libmain.la regex/libregex.la ext/ftp/libftp.la ext/gd/libgd.la ext/mysql/libmysql.la ext/pcre/libpcre.la ext/pgsql/libpgsql.la ext/posix/libposix.la ext/session/libsession.la ext/standard/libstandard.la ext/xml/libxml.la TSRM/libtsrm.la -ldl -lpq -lz -lpng -lgd -lresolv -lm -ldl -lcrypt -lnsl -lr esolv /usr/bin/ld: cannot find -lpq collect2: ld returned 1 exit status make[1]: *** [libphp4.la] Error 1 make[1]: Leaving directory `/home/soft/src/php-4.0.5' make: *** [all-recursive] Error 1 -lpq? pq? Can't find that library or package on my distro, any1 can help me?