No rule to make target error on "make"

Hello, list

I need to just compile a module (ipaq) with a few mods, and when I
"make", I keep getting this error.

I checked all directories, all devel packages are correctly installed,
and I cannot find the problem.

Its FC4 with kernel 2.6.15-1.1833, x86-64 running on AMD Athlon 64.

Here's the Makefile (as published on SourceForge.net, project SynCE):



ifeq ($(KERNELRELEASE),)

LINUX_SOURCE_PATH := /usr/src/linux-2.6.15

KERNEL_BUILD_DIR := /lib/modules/$(shell uname -r)/build/

USB_SERIAL_SOURCE_DIR := $(LINUX_SOURCE_PATH)/drivers/usb/serial
VERSION = 2.6.13.3
PWD := $(shell pwd)

PATCHED := .patched
FILES := usb-serial.h ipaq.h ipaq.c

default: $(LINUX_SOURCE_PATH) $(USB_SERIAL_SOURCE_DIR) $(FILES)
$(PATCHED)
        $(MAKE) -C $(KERNEL_BUILD_DIR) SUBDIRS=$(PWD) modules

all: default

$(LINUX_SOURCE_PATH) $(USB_SERIAL_SOURCE_DIR):
        @echo "Can't find directory $@"
        @echo "Edit $(PWD)/Makefile and provide the correct path to the
Linux source tree."
        @false

usb-serial.h: $(USB_SERIAL_SOURCE_DIR)/usb-serial.h
        ln -sf $< $@

ipaq.h: ipaq.h-$(VERSION)
        ln -sf $< $@

ipaq.c: $(PATCHED)

$(PATCHED): ipaq.c-$(VERSION)
        cp -p $^ ipaq.c
        patch -N -p0 < ipaq-select-endpoints.diff
        patch -N -p0 < ipaq-version.diff
        patch -N -p4 < ipaq-psion-teklogix.diff
        patch -N -p4 < ipaq-smartphones.diff
        touch $(PATCHED)


install: ipaq.ko
        install -m 644 $< /lib/modules/$(shell uname
-r)/kernel/drivers/usb/serial

clean:
        rm -rf $(FILES) $(PATCHED) .tmp_versions *.mod.c *.orig *.o
*.ko .*cmd

else
obj-m   := ipaq.o
endif




I will appreciate any ideas or suggestions.

Thanks in advance,

-- 
Mariano López Reta
Tortuguitas, Buenos Aires
República Argentina