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From: "thiago at kde dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/100005] undefined reference to `_rdrand64_step'
Date: Mon, 12 Apr 2021 15:37:26 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100005

--- Comment #14 from Thiago Macieira <thiago at kde dot org> ---
(In reply to Jakub Jelinek from comment #13)
> The same like in C.
> I.e.
> extern inline __attribute__((gnu_inline, always_inline, artificial)) int =
foo
> (int x) { return x; }
> // The above is typically from some header
> int foo (int x) { return x; }
> // The above is the out of line function definition

Thanks, Jakub. At first sight that's not valid C++, but then since it's an
extension it doesn't have to be. ICC even accepts the same syntax and gener=
ates
the same non-weak symbol.

Any way to do that without repeating the body, thus potentially causing an =
ODR
violation? I'm not likely to use this feature, but asking for a rainy day.

https://gcc.godbolt.org/z/96qW9ExcG=