btf__distill_base
err = btf__distill_base(obj->btf, &base_btf, &btf);
LIBBPF_API int btf__distill_base(const struct btf *src_btf, struct btf **new_base_btf,
if (!ASSERT_EQ(0, btf__distill_base(btf2, &btf3, &btf4),
if (!ASSERT_EQ(0, btf__distill_base(btf2, &btf3, &btf4),
if (!ASSERT_EQ(0, btf__distill_base(btf2, &btf3, &btf4),
if (!ASSERT_EQ(0, btf__distill_base(btf2, &btf3, &btf4),
if (!ASSERT_EQ(0, btf__distill_base(btf2, &btf3, &btf4),
if (!ASSERT_EQ(btf__distill_base(split_btf, &base_dist, &split_dist), 0,
if (!ASSERT_EQ(0, btf__distill_base(split, &new_base, &new_split),
if (!ASSERT_EQ(0, btf__distill_base(btf2, &btf3, &btf4),