> ## Documentation Index
> Fetch the complete documentation index at: https://bazel-pr-29804.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# macro

A callable Starlark value representing a symbolic macro; in other words, the return value of
[`macro()`](../globals/bzl#macro). Invoking this value during package
construction time will instantiate the macro, and cause the macro's implementation function to be
evaluated (in a separate context, different from the context in which the macro value was invoked),
in most cases causing targets to be added to the package's target set. For more information, see
[Macros](https://bazel.build/extending/macros).