Who developed the ELF software in BSD/OS 4.x?
The ELF compiler tools are newer or differently configured versions of programs from the GNU Project of the Free Software Foundation. BSD/OS provides the source code for the GNU programs and libraries that we ship on our contributed software CD-ROM, which we include in all of our binary and source distributions. The dynamic linker in BSD/OS 4.x comes from the Linux operating system, with a few modifications by BSD/OS developers. Some of the other programs that deal with executable files also come from the GNU project, while others are modifications of BSD programs from the University of California or were implemented from scratch by BSD/OS developers. The operating system code for loading ELF programs and generating ELF core files was developed by BSD/OS developers. All of the compiler tools, and the ELF dynamic loader, are available as source code at no cost.