build-sys: Move the print-variable rule to rules.mak
Currently the print-variable rule can only be used in the
root directory:
$ make print-vhost-user-json-y
vhost-user-json-y= contrib/vhost-user-gpu/50-qemu-gpu.json tools/virtiofsd/50-qemu-virtiofsd.json
$ make -C i386-softmmu print-obj-y
make: Entering directory 'build/i386-softmmu'
make: *** No rule to make target 'print-obj-y'. Stop.
make: Leaving directory 'build/i386-softmmu'
Move it to rules.mak so we can use it from other directories:
$ make -C i386-softmmu print-obj-y
make: Entering directory 'build/i386-softmmu'
obj-y=qapi-introspect.o qapi-types-machine-target.o qapi-types-misc-target.o qapi-types.o qapi-visit-machine-target.o qapi-visit-misc-target.o qapi-visit.o qapi-events-machine-target.o qapi-events-misc-target.o qapi-events.o qapi-commands-machine-target.o qapi-commands-misc-target.o qapi-commands.o qapi-init-commands.o
make: Leaving directory 'build/i386-softmmu'
Signed-off-by: Philippe Mathieu-Daudé <[email protected]>
Reviewed-by: Marc-André Lureau <[email protected]>
Message-Id: <
20200306170456[email protected]>
Signed-off-by: Laurent Vivier <[email protected]>