(CPPFLAGS-test-idouble.c): Likewise.
(CPPFLAGS-test-ildouble.c): Likewise.
CFLAGS-test-double.c = -fno-inline -ffloat-store
CFLAGS-test-ldouble.c = -fno-inline -ffloat-store
CFLAGS-test-tgmath.c = -fno-builtin
-CPPFLAGS-test-ifloat.c = -U__LIBC_INTERNAL_MATH_INLINES -D__FAST_MATH__
-CPPFLAGS-test-idouble.c = -U__LIBC_INTERNAL_MATH_INLINES -D__FAST_MATH__
-CPPFLAGS-test-ildoubl.c = -U__LIBC_INTERNAL_MATH_INLINES -D__FAST_MATH__
+CPPFLAGS-test-ifloat.c = -U__LIBC_INTERNAL_MATH_INLINES -D__FAST_MATH__ \
+ -DTEST_FAST_MATH
+CPPFLAGS-test-idouble.c = -U__LIBC_INTERNAL_MATH_INLINES -D__FAST_MATH__ \
+ -DTEST_FAST_MATH
+CPPFLAGS-test-ildoubl.c = -U__LIBC_INTERNAL_MATH_INLINES -D__FAST_MATH__ \
+ -DTEST_FAST_MATH
distribute += libm-test.inc gen-libm-test.pl README.libm-test