src/mainboard/msi/ms7707/Makefile.inc - coreboot - Gitiles

 bootblock-y += gpio.c
 romstage-y += gpio.c
 bootblock-y += early_init.c
 romstage-y += early_init.c
	bootblock-y += gpio.c
	romstage-y += gpio.c
	bootblock-y += early_init.c
	romstage-y += early_init.c