Mesa 26.1.4's DRM UAPI headers include <sys/ioccom.h> as the BSD
include path for ioctl command encoding. The basic _IO / _IOR / _IOW /
_IOWR macros are already in <sys/ioctl.h> (musl-style via cbindgen),
but sys/ioccom.h adds the bitfield widths / masks / shifts / decoders
and the IOC_IN / IOC_OUT / IOC_INOUT / IOCSIZE_* macros that DRM and
other Linux UAPI consumers require.
This header includes <sys/ioctl.h> for the base macros and adds the
Linux-style constants as a thin shim. All new symbols are guarded
with #ifndef so including both headers is safe and idempotent.
This makes the Mesa-side 04-sys-ioccom-stub-header.patch redundant;
that patch can be removed from local/patches/mesa/ and the Mesa
recipe's patches list.
Red Bear OS