Hi Trying to compile nagios plugins on an x86_64 box as i have non standard locations for some software and coming accross this issue. The plugins compile OK but the check_mysql plugin fails to compile and i see this error in the compile log configure:9368: checking for mysql_init in -lmysqlclient configure:9398: gcc -o conftest -g -O2 -I/opt/mysql/include -L. conftest.c -lmysqlclient -L/opt/mysql/lib -lz >&5 /usr/bin/ld: skipping incompatible /opt/mysql/lib/libmysqlclient.a when searching for -lmysqlclient /usr/bin/ld: cannot find -lmysqlclient | char mysql_init (); | mysql_init (); configure:9436: checking for mysql_close in -lmysqlclient configure:9466: gcc -o conftest -g -O2 -I/opt/mysql/include -L. conftest.c -lmysqlclient >&5 /usr/bin/ld: cannot find -lmysqlclient | char mysql_close (); | mysql_close (); configure:10217: WARNING: Skipping mysql plugin any ideas about this as i have to compile these myself - Mysql is being found and does run so any ideas would be great. Tne nagios list has drawn a blank so far. thanks