Hi,
I am writing a module (kmacrt.ko) which need to use some headers and
functions from another external module (madwifi modules, wlan.ko,
etc). The following is my make file:
------------------------------------------------------------------------------
### ifneq ($(KERNELRELEASE),)
obj-m := kmacrt.o
kmacrt-objs := hook.o xmit.o rt_table.o
### else
KERNELPATH ?= /lib/modules/$(shell uname -r)/build
INSTALLPATH = /lib/modules/$(shell uname -r)/net
INCS += -I/home/zwh/macrt/madwifi
COPTS += -Werror
CFLAGS += $(INCS) $(COPTS)
modules:
$(MAKE) -C $(KERNELPATH) SUBDIRS=$(shell pwd) modules
install:
test -d $(INSTALLPATH) || exit 1
cp $(basename ${obj-m}).ko $(INSTALLPATH)
clean:
rm -rf *.o *~ core .depend .*.cmd *.ko *.mod.c .tmp_versions
### endif
------------------------------------------------------------------------------
If I do not comment out the conditions on `KERNELRELEASE', make can
not find the madwifi header files that I am using in my module. If I
comment them out, make succeeds. Why? Normally should I use the
`KERNELRELEASE' conditions in make file?
Another question is that if I use relative path for the include path,
make cannot find header files. Why?
Then I succeed compiling my `macrt.ko' module, although during make,
it complains:
------------------------------------------------------------------------------
MODPOST 1 modules
WARNING: "register_tx_hook" [/home/zwh/macrt/kmacrt/kmacrt.ko] undefined!
WARNING: "unregister_tx_hook" [/home/zwh/macrt/kmacrt/kmacrt.ko] undefined!
------------------------------------------------------------------------------
When I first insert my mode, there is a message
------------------------------------------------------------------------------
no version for "register_tx_hook" found, kernel tainted
------------------------------------------------------------------------------
The message does not appear when I re-insert the module (during one boot).
Although the module works fine, why there are these messages?
Thanks for your help.
Wenhua
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