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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/105510] error: initializer element is not constant
Date: Mon, 09 May 2022 20:39:33 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105510

--- Comment #4 from joseph at codesourcery dot com <joseph at codesourcery =
dot com> ---
We have a documented extension:

    As a GNU extension, GCC allows initialization of objects with static
storage
    duration by compound literals (which is not possible in ISO C99 because
    the initializer is not a constant).
    It is handled as if the object were initialized only with the
brace-enclosed
    list if the types of the compound literal and the object match.
    The elements of the compound literal must be constant.
    If the object being initialized has array type of unknown size, the siz=
e is
    determined by the size of the compound literal.

So the question is whether this extension should also allow the case where=
=20
a compound literal is used to initialize a sub-object.=