+++ /dev/null
-common-obj-$(CONFIG_ADB) += adb.o adb-mouse.o adb-kbd.o
-common-obj-y += hid.o
-common-obj-$(CONFIG_LM832X) += lm832x.o
-common-obj-$(CONFIG_PCKBD) += pckbd.o
-common-obj-$(CONFIG_PL050) += pl050.o
-common-obj-$(CONFIG_PS2) += ps2.o
-common-obj-$(CONFIG_STELLARIS_INPUT) += stellaris_input.o
-common-obj-$(CONFIG_TSC2005) += tsc2005.o
-
-common-obj-$(CONFIG_VIRTIO_INPUT) += virtio-input.o
-common-obj-$(CONFIG_VIRTIO_INPUT) += virtio-input-hid.o
-common-obj-$(CONFIG_VIRTIO_INPUT_HOST) += virtio-input-host.o
-common-obj-$(CONFIG_VHOST_USER_INPUT) += vhost-user-input.o
-
-common-obj-$(CONFIG_MILKYMIST) += milkymist-softusb.o
-common-obj-$(CONFIG_PXA2XX) += pxa2xx_keypad.o
-common-obj-$(CONFIG_TSC210X) += tsc210x.o
-common-obj-$(CONFIG_LASIPS2) += lasips2.o
--- /dev/null
+softmmu_ss.add(files('hid.c'))
+softmmu_ss.add(when: 'CONFIG_ADB', if_true: files('adb.c', 'adb-mouse.c', 'adb-kbd.c'))
+softmmu_ss.add(when: 'CONFIG_LM832X', if_true: files('lm832x.c'))
+softmmu_ss.add(when: 'CONFIG_PCKBD', if_true: files('pckbd.c'))
+softmmu_ss.add(when: 'CONFIG_PL050', if_true: files('pl050.c'))
+softmmu_ss.add(when: 'CONFIG_PS2', if_true: files('ps2.c'))
+softmmu_ss.add(when: 'CONFIG_STELLARIS_INPUT', if_true: files('stellaris_input.c'))
+softmmu_ss.add(when: 'CONFIG_TSC2005', if_true: files('tsc2005.c'))
+
+softmmu_ss.add(when: 'CONFIG_VIRTIO_INPUT', if_true: files('virtio-input.c'))
+softmmu_ss.add(when: 'CONFIG_VIRTIO_INPUT', if_true: files('virtio-input-hid.c'))
+softmmu_ss.add(when: 'CONFIG_VIRTIO_INPUT_HOST', if_true: files('virtio-input-host.c'))
+softmmu_ss.add(when: 'CONFIG_VHOST_USER_INPUT', if_true: files('vhost-user-input.c'))
+
+softmmu_ss.add(when: 'CONFIG_MILKYMIST', if_true: files('milkymist-softusb.c'))
+softmmu_ss.add(when: 'CONFIG_PXA2XX', if_true: files('pxa2xx_keypad.c'))
+softmmu_ss.add(when: 'CONFIG_TSC210X', if_true: files('tsc210x.c'))
+softmmu_ss.add(when: 'CONFIG_LASIPS2', if_true: files('lasips2.c'))