Currently we copy the aclocal directory to the build so that autotools
doesn't see .m4 files disappear when its processing them. This can happen
if for example, package X is being rebuilt at the same time as Y and it
gets uninstalled from sstate (assuming there are no dependencies between
X and Y). This code making the copy was added to avoid races but introduces
a race of its own, namely that the files can disappear during the copy.
This patch adds a cp-noerror script which silently ignores such errors
and gives the behaviour we need in this case. It hence fixes issues which
crop up for users and the autobuilder occasionally.
[YOCTO #2485]
(From OE-Core rev: 0f81fbc0df73675aeb79c724858799a3b6a02f85)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
a92ff3ad42