I have two modules A & B. B depends on A.
Module B, which uses kernel API like wake_up_interruptible and exported function calls from Module A. When module B is linked, its prints a line for every function call and symbol it access from module A but not from kernel (makefile is attached)
*** Warning: "XYZ" [module-b.ko] undefined!
I think for kernel symbols it is able to find compiled object but for module-a it cannot. Can anybody tell how can I specify where to objs for module-a are. So that it will not complain at link time.
Thanks
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#
# Makefile for module-b
#
INCLUDES := -I /usr/src/linux/include -I ../module-a
kernel_source := /usr/src//linux
EXTRA_CFLAGS += ${INCLUDES}
default: all
obj-m := module-b.o
module-b-objs = module-b.o
module-b.o: $(module-b-objs)
$(LD) -r $^
-o $@
all:
$(MAKE) -C $(kernel_source) SUBDIRS=`pwd` modules;
