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From: "josh at joshtriplett dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/54162] New: Does not accept static global anonymous unions or structs
Date: Thu, 02 Aug 2012 23:04:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D54162

             Bug #: 54162
           Summary: Does not accept static global anonymous unions or
                    structs
    Classification: Unclassified
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: josh@joshtriplett.org


C1X, and numerous other compilers, support static anonymous unions or struc=
ts
at file scope.  For example, the following code should work with a C1X
compiler:

static union {
    unsigned x;
    unsigned y;
};

int main(void)
{
    x =3D 5;
    return y;
}

However, GCC says:

test.c:4:1: warning: unnamed struct/union that defines no instances [enable=
d by
default]
test.c: In function =E2=80=98main=E2=80=99:
test.c:8:5: error: =E2=80=98x=E2=80=99 undeclared (first use in this functi=
on)
test.c:8:5: note: each undeclared identifier is reported only once for each
function it appears in
test.c:9:12: error: =E2=80=98y=E2=80=99 undeclared (first use in this funct=
ion)