makefile : missing separator

#kernel build system and can use its lanauge
ifneq($(KERNELRELEASE),)
 obj-m:=helloworld.o
else
 KDIR:= /lib/modules/2.6.33.3-85.fc13.i686/build
all:
 ma开发者_运维问答ke -C $(KDIR) M=$(PWD) modules
clean:
 rm -f *.ko *.o *.mod.o *.mod.c *.symvers
endif

The error is:

makefile:2:*** missing separator . stop

but for the ifneq($(KERNELRELEASE),), if I add a tab before, I get another error:

makefile:2: ***commands commence before first target. stop

There must be a space between ifneq and (.

The TAB prefix means that it is a shell command, so be sure that the shell commands (make and rm) begin with TAB, and all other lines such as ifneq do not begin with TAB.

Make is complaining that the second line doesn't start with a tab. Your IDE/texteditor may be saving the file using spaces as equivalent to a tab character. Either configure the IDE to use the tab character, or use a simple editor like vim or nano and replace the leading white space on the second line with a tab.

Check before obj-m: and KDIR: etc. Are your tabs being inserted as spaces?

You're missing the second part of your conditional ifneq($(KERNELRELEASE),) needs to have something after the comma, like "2.6.17" (for example).