No, your changes don't cover /usr/lib64. In guichan.m4 there is list of directories in which it is looking for libguichan. You need to add either /usr/lib64 or /*/lib64, not /usr/lib64/*.
No, your changes don't cover /usr/lib64. In guichan.m4 there is list of directories in which it is looking for libguichan. You need to add either /usr/lib64 or /*/lib64, not /usr/lib64/*.