Scans all the modules in the specified directory, ensuring that
any extension point implemented by a module is registered.
This may not actually load and initialize all the types in each
module, some modules may be lazily loaded and initialized when
an extension point it implementes is used with e.g.
g_io_extension_point_get_extensions() or
g_io_extension_point_get_extension_by_name().
If you need to guarantee that all types are loaded in all the modules,
use g_io_modules_load_all_in_directory().
Since 2.24
Scans all the modules in the specified directory, ensuring that any extension point implemented by a module is registered. This may not actually load and initialize all the types in each module, some modules may be lazily loaded and initialized when an extension point it implementes is used with e.g. g_io_extension_point_get_extensions() or g_io_extension_point_get_extension_by_name(). If you need to guarantee that all types are loaded in all the modules, use g_io_modules_load_all_in_directory(). Since 2.24