checking for system mx library availability... no checking for system dynamic linker library availability... yes checking for SGI /dev/scsi library availability... no checking whether an OpenGL library is available... no checking whether the WindowsGL library is available... no checking whether the SGI graphics library is available... no checking whether the Solaris lexer library is available... no checking whether the libgen library is available... no checking whether the Standard C++ library is available... yes checking for Java functionality... yes checking for OpenGL functionality... no configure: OpenGL does not appear to be functionally available checking whether to build against OpenGL... no checking for WindowsGL functionality... no configure: WindowsGL does not appear to be functionally available checking whether to build against WindowsGL... no checking for X11 header functionality... yes checking for X11 link functionality... no configure: X11 was requested, but no system X11 libraries were found configure: }}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}} configure: Try adding --without-x11 configure: error: *** Using X11 was requested, yet no system X11 was found *** IriX64@FthrNtr ~/brlcad-7.10.0 $