This is meant to be used in conjunction with rtems-top, where it is submoduled in. Things in here might still be useful to people outside of SLAC, though (particularly the CMake toolchains).
CMake toolchain files can be found in the toolchains subdirectory.
These can be used like this:
cmake . -Bbuild-i386-rtems -GNinja -DCMAKE_BUILD_TYPE=Release -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -DCMAKE_TOOLCHAIN_FILE=path/to/this/repo/toolchains/rtems6-pc686.cmake
The flags provided in the toolchain files comes from the generated Makefile.cfg produced by RTEMS.