Something

make all
make -C "/lib/modules/2.6.20-15-generic/build" SUBDIRS="/home/profx/qc-usb-messenger-1.5" modules V=1 USER_OPT="-DHAVE_UTSRELEASE_H=1"
make[1]: Entering directory `/usr/src/linux-headers-2.6.20-15-generic'
test -e include/linux/autoconf.h -a -e include/config/auto.conf || (            \
        echo;                                                           \
        echo "  ERROR: Kernel configuration is invalid.";               \
        echo "         include/linux/autoconf.h or include/config/auto.conf are missing.";      \
        echo "         Run 'make oldconfig && make prepare' on kernel src to fix it.";  \
        echo;                                                           \
        /bin/false)
mkdir -p /home/profx/qc-usb-messenger-1.5/.tmp_versions
rm -f /home/profx/qc-usb-messenger-1.5/.tmp_versions/*
make -f scripts/Makefile.build obj=/home/profx/qc-usb-messenger-1.5
  gcc -m32 -Wp,-MD,/home/profx/qc-usb-messenger-1.5/.qc-driver.o.d  -nostdinc -isystem /usr/lib/gcc/i486-linux-gnu/4.1.2/include -D__KERNEL__ -Iinclude  -include include/linux/autoconf.h -Iubuntu/include  -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -O2 -pipe -msoft-float -mregparm=3 -mpreferred-stack-boundary=2  -march=i586 -mtune=generic -ffreestanding -maccumulate-outgoing-args   -Iinclude/asm-i386/mach-default -fomit-frame-pointer -g  -fno-stack-protector -Wdeclaration-after-statement -Wno-pointer-sign -DNOKERNEL -DHAVE_UTSRELEASE_H=1  -DMODULE -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(qc_driver)"  -D"KBUILD_MODNAME=KBUILD_STR(quickcam)" -c -o /home/profx/qc-usb-messenger-1.5/.tmp_qc-driver.o /home/profx/qc-usb-messenger-1.5/qc-driver.c
In file included from /home/profx/qc-usb-messenger-1.5/qc-driver.c:47:
/home/profx/qc-usb-messenger-1.5/quickcam.h:93:26: error: linux/config.h: No such file or directory
/home/profx/qc-usb-messenger-1.5/qc-driver.c:94:2: warning: #warning "Little Endian system"
/home/profx/qc-usb-messenger-1.5/qc-driver.c: In function ‘qc_int_init’:
/home/profx/qc-usb-messenger-1.5/qc-driver.c:773: warning: passing argument 6 of ‘usb_fill_int_urb’ from incompatible pointer type
/home/profx/qc-usb-messenger-1.5/qc-driver.c: In function ‘qc_isoc_start’:
/home/profx/qc-usb-messenger-1.5/qc-driver.c:2129: warning: assignment from incompatible pointer type
make[2]: *** [/home/profx/qc-usb-messenger-1.5/qc-driver.o] Error 1
make[1]: *** [_module_/home/profx/qc-usb-messenger-1.5] Error 2
make[1]: Leaving directory `/usr/src/linux-headers-2.6.20-15-generic'
make: *** [quickcam.ko] Error 2