lib/math/Makefile - kernel/common - Git at Google

 obj-y += div64.o gcd.o lcm.o int_pow.o int_sqrt.o reciprocal_div.o

 obj-$(CONFIG_CORDIC)		+= cordic.o
 obj-$(CONFIG_PRIME_NUMBERS)	+= prime_numbers.o
 obj-$(CONFIG_RATIONAL)		+= rational.o
	obj-y += div64.o gcd.o lcm.o int_pow.o int_sqrt.o reciprocal_div.o

	obj-$(CONFIG_CORDIC) += cordic.o
	obj-$(CONFIG_PRIME_NUMBERS) += prime_numbers.o
	obj-$(CONFIG_RATIONAL) += rational.o