php 4.3.4 compile problem

Hello, I'm trying to compile php 4.3.4 on solaris 9 with gcc 3.3, linking with apache 2. It seems that no matter what `configure' options I use, or which linker (Sun's ld vs GNU ld), the build bails the same way, at the same place: ---- /bin/sh /opt/system/software/src/php-4.3.4/libtool --silent --preserve-dup-deps --mode=link gcc -g -O2 -prefer-pic -rpath /opt/system/software/src/php-4.3.4/libs -avoid-version -module -L/usr/ucblib -L/opt/bin/../lib/gcc-lib/sparc-sun-solaris2.9/3.3 -L/opt/ssl/lib -L/opt/lib -L/opt/mysql/lib/mysql -L/opt/ssl/lib -L /opt/lib -R /usr/ucblib -R /opt/bin/../lib/gcc-lib/sparc-sun-solaris2.9/3.3 -R /opt/ssl/lib -R /opt/lib -R /opt/mysql/lib/mysql ext/openssl/openssl.lo ext/ctype/ctype.lo ext/ldap/ldap.lo ext/mysql/php_mysql.lo ext/overload/overload.lo ext/pcre/pcrelib/maketables.lo ext/pcre/pcrelib/get.lo ext/pcre/pcrelib/study.lo ext/pcre/pcrelib/pcre.lo ext/pcre/php_pcre.lo ext/posix/posix.lo ext/session/session.lo ext/session/mod_files.lo ext/session/mod_mm.lo ext/session/mod_user.lo regex/regcomp.lo regex/regexec..lo regex/regerror.lo regex/regfree.lo ext/standard/array.lo ext/standard/base64.lo ext/standard/basic_functions.lo ext/standard/browscap.lo ext/standard/crc32.lo ext/standard/crypt.lo ext/standard/cyr_convert.lo ext/standard/datetime.lo ext/standard/dir.lo ext/standard/dl.lo ext/standard/dns.lo ext/standard/exec.lo ext/standard/file.lo ext/standard/filestat.lo ext/standard/flock_compat.lo ext/standard/formatted_print.lo ext/standard/fsock.lo ext/standard/head.lo ext/standard/html.lo ext/standard/image.lo ext/standard/info.lo ext/standard/iptc.lo ext/standard/lcg.lo ext/standard/link.lo ext/standard/mail.lo ext/standard/math.lo ext/standard/md5.lo ext/standard/metaphone.lo ext/standard/microtime.lo ext/standard/pack.lo ext/standard/pageinfo..lo \ ext/standard/parsedate.lo ext/standard/quot_print.lo ext/standard/rand.lo ext/standard/reg.lo ext/standard/soundex.lo ext/standard/string.lo ext/standard/scanf.lo ext/standard/syslog.lo ext/standard/type.lo ext/standard/uniqid.lo ext/standard/url.lo ext/standard/url_scanner.lo ext/standard/var.lo ext/standard/versioning.lo ext/standard/assert.lo ext/standard/strnatcmp.lo ext/standard/levenshtein.lo ext/standard/incomplete_class.lo ext/standard/url_scanner_ex.lo ext/standard/ftp_fopen_wrapper.lo ext/standard/http_fopen_wrapper.lo ext/standard/php_fopen_wrapper.lo ext/standard/credits.lo ext/standard/css.lo ext/standard/var_unserializer.lo ext/standard/ftok.lo ext/standard/aggregation.lo ext/standard/sha1.lo ext/tokenizer/tokenizer.lo ext/xml/xml.lo ext/xml/expat/xmlparse.lo ext/xml/expat/xmlrole.lo ext/xml/expat/xmltok.lo TSRM/TSRM.lo TSRM/tsrm_strtok_r.lo TSRM/tsrm_virtual_cwd.lo main/main.lo main/snprintf.lo main/spprintf.lo main/php_sprintf.lo main/safe_mode.lo main/fopen_wrappers.lo main/alloca.lo main/php_scandir.lo main/php_ini.lo main/SAPI.lo main/rfc1867.lo main/php_content_types.lo main/strlcpy.lo main/strlcat.lo main/mergesort.lo main/reentrancy.lo main/php_variables.lo main/php_ticks.lo main/streams.lo main/network.lo main/php_open_temporary_file.lo main/php_logos.lo main/output.lo main/memory_streams.lo main/user_streams.lo Zend/zend_language_parser.lo Zend/zend_language_scanner.lo Zend/zend_ini_parser.lo Zend/zend_ini_scanner.lo Zend/zend_alloc.lo Zend/zend_compile.lo Zend/zend_constants.lo Zend/zend_dynamic_array.lo Zend/zend_execute_API.lo Zend/zend_highlight.lo Zend/zend_llist.lo Zend/zend_opcode.lo Zend/zend_operators.lo \ Zend/zend_ptr_stack.lo Zend/zend_stack.lo Zend/zend_variables.lo Zend/zend.lo Zend/zend_API.lo Zend/zend_extensions.lo Zend/zend_hash.lo Zend/zend_list.lo Zend/zend_indent.lo Zend/zend_builtin_functions.lo Zend/zend_sprintf.lo Zend/zend_ini.lo Zend/zend_qsort.lo Zend/zend_multibyte.lo Zend/zend_execute.lo sapi/apache2handler/sapi_apache2.lo sapi/apache2handler/apache_config.lo sapi/apache2handler/php_functions.lo main/internal_functions.lo -lmysqlclient -lldap -llber -lssl -lcrypto -lresolv -lm -ldl -lnsl -lsocket -lgcc -o libphp4.la /opt/system/software/src/php-4.3.4/libtool: null directory libtool: link: cannot determine absolute directory name of `' *** Error code 1 make: Fatal error: Command failed for target `libphp4.la' ---- Where does this "null directory" come from, and/or where should I look to find out? Many thanks, Brent