Hi People I am trying to build a piece of software from source in this case aide 0.13.1 using this config line ./configure --with-zlib --with-selinux. The configure step completes but there is a Warning that concerns me. This is taken from config.log configure:9809: checking for mhash_get_block_size in -lmhash configure:9844: gcc -o conftest -g -O2 -static -static conftest.c -lmhash -lz >&5 /usr/bin/ld: cannot find -lmhash collect2: ld returned 1 exit status The machine I am trying to do this build on is Cent0S 5 with the latest updates. It didn't originally have gcc installed so I have installed that and mhash and mhash-devel are also installed. I know I can ignore the warning and just carry on, or that there are already aide RPMS. But I am doing this as an exercise for myself as I want to up skill in RPM creation. So if anyone can offer incite into why this is happening it would be appreciated. rpm -qa | grep gcc libgcc-4.1.2-14.el5 gcc-4.1.2-14.el5 rpm -qa | grep mhash mhash-0.9.9-1.el5.centos mhash-devel-0.9.9-1.el5.centos Please let me know any other information that would be useful, have a nice day :)