Variable: module-file-suffix
module-file-suffix is a variable defined in lread.c.
Value
".so"
Documentation
Suffix of loadable module file, or nil if modules are not supported.
Probably introduced at or before Emacs version 25.1.
Source Code
// Defined in /usr/src/emacs/src/lread.c
DEFVAR_LISP ("module-file-suffix", Vmodule_file_suffix,
doc: /* Suffix of loadable module file, or nil if modules are not supported. */);