如何通过内核级别的Makefile查找* .o文件

Question

Generally in kernel level make file contain

$(CONFIG_SERIAL_DEVICE) += serial.o

When we are making user level make file then it'll find .o file from that particular folder. But in this, where serial.o exist??

Answer 1

For Example

drivers/serial/Makefile:obj-$(CONFIG_SERIAL_TXX9)+=serial_txx9.o

this Makefile in kernel serial driver will build depending .config of respective kernel code. It will pick details like build statically or dynamically from .config.