Hwllo, I sent a private message, of which a reply was CC to this list AFAIK, about building dillo on my AIX system. The problem are threads. Pth can't be used and so I need the system's native threads. A solution was offered me but another email asked for more information, so I report first this information here before trying blindly. configure reports: checking target system type... rs6000-ibm-aix4.2.1.0 as far the system concerns. The error during configure is: checking whether threads work with -pthread... no. Now we will try some libraries. checking for library containing pthread_create... no configure: WARNING: *** No pthreads found. *** gcc -v yields: Reading specs from /usr/local/lib/gcc-lib/rs6000-ibm-aix4.2.1.0/2.95.3/specs gcc version 2.95.3 20010315 (release) while lslpp -l | egrep -i 'thread|xlc|gcc' bos.rte.libpthreads 4.2.1.0 COMMITTED pthreads Library xlC.cpp 3.1.4.0 COMMITTED C for AIX Preprocessor xlC.rte 3.1.4.0 COMMITTED C Set ++ for AIX Application greets, Ric