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@henesy@merveilles.town @neauoire If I'm reading the standard right, (open-std.org/jtc1/sc22/wg14/ww section 6.7.6.3. points 10 and 14) a declaration with an empty parameter type list should mean the same as void fn(...); which means unknown number and types of arguments. Presumably you then could use va_arg facility in its definition.

In any case void fn() and void fn(void) are of different types.

@henesy@merveilles.town @neauoire Using void fn() instead of void fn(...) is allowed but discouraged in ANSI C, while the Plan 9 compilers reject it outright.

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