91bc07c9e8
'|& ...' is a bash 4.0+ construct which is not guaranteed to be available when using '$(shell ...)' in a Makefile. Fall back to the more portable '2>&1 | ...'. Fixes the following warning during compilation: /bin/sh: 1: Syntax error: "&" unexpected Signed-off-by: Joe Stringer <joe@wand.net.nz> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>