Use __attribute__((used)) when available

[phst]

No description provided.

[gemini-code-assist]

Code Review

This pull request introduces a new EXPORT macro (which combines VISIBLE and a conditionally defined USED attribute) to annotate emacs_module_init and plugin_is_GPL_compatible in elisp/proto/module.c. The reviewer feedback recommends prefixing the generic macro names USED and EXPORT with a more unique prefix like ELISP_PROTO_ to avoid potential naming collisions with other system or third-party headers.

Important

The consumer version of Gemini Code Assist on GitHub is being sunset. Starting June 18, 2026, new organization installations will be blocked, and all code review activity will officially cease on July 17, 2026.
For more details on the timeline and next steps, please review the Help Documentation.