linux/arch/x86/kernel/Makefile

ifeq ($(CONFIG_X86_32),y)
include ${srctree}/arch/x86/kernel/Makefile_32
else
include ${srctree}/arch/x86/kernel/Makefile_64
endif

# Workaround to delete .lds files with make clean
# The problem is that we do not enter Makefile_32 with make clean.
clean-files := vsyscall*.lds vsyscall*.so