I was compiling the kernel 2.4.20 with gcc 3.2:
Applied the paches pre1, pre2, pre3, pre4, pre5
kernel configuration described in the attached file
and got the following output with an error message

make[2]: Leaving directory `/usr/src/linux-2.4.20/arch/i386/lib'
make[1]: Leaving directory `/usr/src/linux-2.4.20/arch/i386/lib'
ld -m elf_i386 -T /usr/src/linux-2.4.20/arch/i386/vmlinux.lds -e stext arch/i386/kernel/head.o arch/i386/kernel/init_task.o init/main.o init/version.o init/do_mounts.o \
        --start-group \
        arch/i386/kernel/kernel.o arch/i386/mm/mm.o kernel/kernel.o mm/mm.o fs/fs.o ipc/ipc.o \
         drivers/parport/driver.o drivers/char/char.o drivers/block/block.o drivers/misc/misc.o drivers/net/net.o drivers/media/media.o drivers/char/agp/agp.o drivers/char/drm/drm.o drivers/ide/idedriver.o drivers/cdrom/driver.o drivers/sound/sounddrivers.o drivers/pci/driver.o drivers/video/video.o \
        net/network.o \
        /usr/src/linux-2.4.20/arch/i386/lib/lib.a /usr/src/linux-2.4.20/lib/lib.a /usr/src/linux-2.4.20/arch/i386/lib/lib.a \
        --end-group \
        -o vmlinux
drivers/char/drm/drm.o: In function `sis_fb_alloc':
drivers/char/drm/drm.o(.text+0x7120): undefined reference to `sis_malloc'
drivers/char/drm/drm.o(.text+0x71c4): undefined reference to `sis_free'
drivers/char/drm/drm.o: In function `sis_fb_free':
drivers/char/drm/drm.o(.text+0x7237): undefined reference to `sis_free'
drivers/char/drm/drm.o: In function `sis_final_context':
drivers/char/drm/drm.o(.text+0x766e): undefined reference to `sis_free'
make: *** [vmlinux] Error 1

thank you