Explanation about components in the pkg_config generator

reference/generators/pkg_config.rst

@@ -4,11 +4,19 @@
 pkg_config
 ==========
 
-Generates N files named ``<PKG-NAME>.pc`` (where ``<PKG-NAME`` is the name declared by dependencies in 
+Generates pkg-config files named *<PKG-NAME>.pc* (where ``<PKG-NAME`` is the name declared by dependencies in 
 ``cpp_info.name`` or in ``cpp_info.names["pkg_config"]`` if specified), containing a
 valid pkg-config file syntax. The ``prefix`` variable is automatically adjusted to the ``package_folder``.
 
-Go to :ref:`Integrations/pkg-config and pc files/Use the pkg_config generator<pkg_config_generator_example>`
-if you want to learn how to use this generator.
+Components
+++++++++++
+
+If a recipe uses :ref:`components<package_information_components>`, the files generated will be *<COMP-NAME>.pc* with their corresponding
+flags and require relations.
 
+Additionally, a *<PKG-NAME>.pc* is generated to maintain compatibility for consumers with recipes that start supporting components. This
+*<PKG-NAME>.pc* file will declare the all the components of the package as requires while the rest of the fields will be empty, relying on
+the propagation of flags coming from the components *<COMP-NAME>.pc* files.
 
+Go to :ref:`Integrations/pkg-config and pc files/Use the pkg_config generator<pkg_config_generator_example>`
+if you want to learn how to use this generator.