In this stage we step it up and showcase how to integrate multiple cc_library targets from different packages.

Below, we see a similar configuration from Stage 2, except that this BUILD file is in a subdirectory called lib. In Bazel, subdirectories containing BUILD files are known as packages. The new property visibility will tell Bazel which package(s) can reference this target, in this case the //main package can use hello-time library.

cc_library(
    name = "hello-time",
    srcs = ["hello-time.cc"],
    hdrs = ["hello-time.h"],
    visibility = ["//main:__pkg__"],
)

To use our hello-time library, an extra dependency is added in the form of //path/to/package:target_name, in this case, it's //lib:hello-time

cc_binary(
    name = "hello-world",
    srcs = ["hello-world.cc"],
    deps = [
        ":hello-greet",
        "//lib:hello-time",
    ],
)

To build this example, use

bazel build //main:hello-world