Assumed I have those machines:
Is there a way to respond all machine1s at once?
For example in a *.bbappend file:
SRC_URI_machine1* += "file://file/for/machines/of/type/1"
instead of:
SRC_URI_machine1a += "file://file/for/machines/of/type/1"
SRC_URI_machine1b += "file://file/for/machines/of/type/1"
No,wildcards can't be used in such a way.
You could handle it in a number of different way. One way is to add a common machine-override for your family of devices.
One simple way to do this, is to add the following to the machine configurations of machine1a and machine1b (or a common include file).
SOC_FAMILY = "machine1-common"
include conf/machine/include/soc-family.inc
By doing that, you could write
SRC_URI_machine1-common += "file://file/for/machines/of/type/1"
and that would apply to both machine1a and machine1b.
What soc-family.inc does is
# Add SOC_FAMILY to machine overrides so we get access to e.g. 'omap3' and 'ti335x'
SOC_FAMILY ??= ""
MACHINEOVERRIDES =. "${@['', '${SOC_FAMILY}:']['${SOC_FAMILY}' != '']}"
If you're already using an SoC, whose BSP already uses SOC_FAMILY, you could instead add the following line to machine1a.conf and machine1b.conf
MACHINEOVERRIDES =. "machine1-common:"