Hello, Does anyone know what happened to the ELF headers in RH 6.1 The Elf descriptor and prototypes used to be defined in /usr/include/libelf/libelf.h, but in 6.1 there is no such directory. /usr/include/elf.h is defined in glibc RPM, which is where I would expect them. You can not do any elf work without the elf descriptor. Anyone have any ideas? Thanks John