LinuxQuestions.org - Make file Error.

I m installing network driver for my ethernet controller.
However whenever i run make install it gives me below error.

Code:

# make install

Makefile:23: *** missing separator.  Stop.

I did google and come to know that it has to do with wrong coding in Makefile but couldn't able to rectify the error.

Here is my Makefile.

Code:

# cat Makefile

#$FreeBSD$

.PATH:  ${.CURDIR}

KMOD    = if_igb

SRCS    = device_if.h bus_if.h pci_if.h opt_bdg.h

SRCS    += if_igb.c $(SHARED_SRCS)

SHARED_SRCS = e1000_api.c e1000_phy.c e1000_nvm.c e1000_mac.c e1000_manage.c

SHARED_SRCS += e1000_osdep.c e1000_82575.c e1000_vf.c e1000_mbx.c

CFLAGS  += -DSMP



# DEVICE_POLLING gives you non-interrupt handling

#CFLAGS  += -DDEVICE_POLLING



clean:

        rm -f opt_bdg.h device_if.h bus_if.h pci_if.h setdef*

        rm -f *.o *.kld *.ko

        rm -f @ machine

        rm -f ${CLEANFILES}



man:

        mv /usr/share/man/man4/igb.4.gz /usr/share/man/man4/igbSAVE.4.gz

        cp igb.4 /usr/share/man/man4/



.include <bsd.kmod.mk>

[root@OFSMUP-VS-08 src]# make install

Makefile:23: *** missing separator.  Stop.

[root@OFSMUP-VS-08 src]# cat Makefile

#$FreeBSD$

.PATH:  ${.CURDIR}

KMOD    = if_igb

SRCS    = device_if.h bus_if.h pci_if.h opt_bdg.h

SRCS    += if_igb.c $(SHARED_SRCS)

SHARED_SRCS = e1000_api.c e1000_phy.c e1000_nvm.c e1000_mac.c e1000_manage.c

SHARED_SRCS += e1000_osdep.c e1000_82575.c e1000_vf.c e1000_mbx.c

CFLAGS  += -DSMP



# DEVICE_POLLING gives you non-interrupt handling

#CFLAGS  += -DDEVICE_POLLING



clean:

        rm -f opt_bdg.h device_if.h bus_if.h pci_if.h setdef*

        rm -f *.o *.kld *.ko

        rm -f @ machine

        rm -f ${CLEANFILES}



man:

        mv /usr/share/man/man4/igb.4.gz /usr/share/man/man4/igbSAVE.4.gz

        cp igb.4 /usr/share/man/man4/



.include <bsd.kmod.mk>

Appreciate if exact cause of error identified.