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From: "muecker at gwdg dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/110815] New: [static] not as useful as the nonnull attribute
Date: Wed, 26 Jul 2023 13:45:38 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110815

            Bug ID: 110815
           Summary: [static] not as useful as the nonnull attribute
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: muecker at gwdg dot de
  Target Milestone: ---

C code increasingly uses

void foo(char buf[static 10]);

to indicate that buf is a non-null pointer.

GCC already has some warnings for this but all you would get with the nonnu=
ll
attribute. In particular, -Wnonnull-compare is missing.=20


void
foo (int a[static 1])
{
  if ((void*)0 =3D=3D a)  // should warn
    return;
}


https://godbolt.org/z/E6E33Pa8h=