How to update compatibility for rdma-core:

Clone the linux-rdma/rdma-core repo.

Run compat/scripts/rcore-mkcompat.sh to initialize compat/VER.
Usage: 
	compat/scripts/rcore-mkcompat.sh <path/to/rdma-core> <tag> <prev-tag>
Example:
	compat/scripts/rcore-mkcompat.sh ../rdma-core v46.0 v45.0

Check for compat/VER/FIXME.  If present, follow the instructions there first.

Then, follow the instructions in compat/VER/TODO.

Use compat/scripts/rcore-build.sh:

    compat/scripts/rcore-build.sh <path/to/rdma-core> <tag>

    cd build
    make

First rcore-build.sh checks out the specific version of rdma-core, and builds and
installs it under libionic/build/rdma-core.  Then, rcore-build.sh configures libionic to
refer to that rdma-core install dir, and attempts to build libionic.

If needed, enter the build directory and run make to rebuild.

If any changes are needed other than to compat/VER/compatdefs.h, use rcore-build.sh to
check that builds are not broken for other versions.

The FIXME and TODO files are not meant to be checked in.
When all tasks are completed, delete those files before checking in changes.
