Previous versions of the OpenEmbedded build system used to
create a global shared sysroot per machine along with a native
sysroot.
Beginning with the 2.3 version of the Yocto Project,
sysroots exist in recipe-specific
WORKDIR
directories.
Thus, the build/tmp/sysroots/
directory
is unused.
build/tmp/sysroots/
directory
can still be populated using the
bitbake build-sysroots
command and can
be used for compatibility in some cases.
However, in general it is not recommended to populate
this directory.
Individual recipe-specific sysroots should be used.