Problems building 5.3 with apache2 support

Hi list. I'm trying to build php 5.3 on Ubuntu. I have installed apache2-threaded-dev and used the following configure settings: ./configure --with-apxs2=/usr/bin/apxs2 Running make starts building some files until it fails with the following output: (snip) ext/sqlite3/libsqlite/sqlite3.o: In function `memset': /usr/include/bits/string3.h:82: warning: memset used with constant zero length parameter; this could be due to transposed parameters ext/standard/.libs/info.o: In function `php_info_print_table_header': /home/tkn/public/php-5.3.0/ext/standard/info.c:1071: undefined reference to `ts_resource_ex' ext/standard/.libs/info.o: In function `php_info_write_wrapper': /home/tkn/public/php-5.3.0/ext/standard/info.c:80: undefined reference to `ts_resource_ex' ext/standard/.libs/info.o: In function `php_info_print_table_row_internal': /home/tkn/public/php-5.3.0/ext/standard/info.c:1115: undefined reference to `ts_resource_ex' ext/standard/.libs/info.o: In function `php_print_gpcse_array': /home/tkn/public/php-5.3.0/ext/standard/info.c:149: undefined reference to `executor_globals_id' ext/standard/.libs/info.o: In function `php_print_info': /home/tkn/public/php-5.3.0/ext/standard/info.c:939: undefined reference to `executor_globals_id' /home/tkn/public/php-5.3.0/ext/standard/info.c:942: undefined reference to `executor_globals_id' /home/tkn/public/php-5.3.0/ext/standard/info.c:945: undefined reference to `executor_globals_id' /home/tkn/public/php-5.3.0/ext/standard/info.c:948: undefined reference to `executor_globals_id' /home/tkn/public/php-5.3.0/ext/standard/info.c:870: undefined reference to `sapi_globals_id' /home/tkn/public/php-5.3.0/ext/standard/info.c:644: undefined reference to `sapi_globals_id' /home/tkn/public/php-5.3.0/ext/standard/info.c:849: undefined reference to `sapi_globals_id' collect2: ld returned 1 exit status make: *** [sapi/cli/php] Error 1 what am I doing wrong? -- troels