Your output shows that the two undefined symbols are used/referenced in libapr-1.so. I would check over the build of your libapr and/or apr utils. Please respond to users@xxxxxxxxxxxxxxxx To: users@xxxxxxxxxxxxxxxx cc: (bcc: Dan Mitton/YD/RWDOE) Subject: Error when compiling apache 2.2.10 on solaris 10, suggestions? LSN: Not Relevant User Filed as: Not a Record Undefined first referenced symbol in file __sync_fetch_and_add_4 /usr/local/lib/libapr-1.so __sync_fetch_and_sub_4 /usr/local/lib/libapr-1.so ld: fatal: Symbol referencing errors. No output written to htpasswd collect2: ld returned 1 exit status I had previously compiled and installed APR1.3.3 and APRUTIL1.3.4 into /usr/local/ the config goes off without problems. I have also compiled and installed OPENSSL 0.9.8i here is my configure command line. configure --with-mpm=prefork --enable-mods-shared="all ssl deflate imagemap cache proxy mem_cache file_cache disk_cache" --prefix=/sites/www-site/APACHE/httpd-2.2.10-prefork --with-ssl=/sites/www-site/openssl/lib --with-z=/usr/local/lib --enable-nonportable-atomics=yes --disable-ipv6 --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx