gistfile1.txt

che@nok ~ $ cat try.c
typedef struct {
        int number;
} FRIDGE;

typedef struct {
        int age;
        struct FRIDGE fridge;
} PERSON;

int main()
{
        FRIDGE fr;
        fr.number=1;

        PERSON me;
        me.age=1;
        me.fridge.number = 1;
}

che@nok ~ $ gcc --version
gcc (Gentoo 4.5.4 p1.0, pie-0.4.7) 4.5.4
Copyright (C) 2010 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

che@nok ~ $ gcc -o try try.c
try.c:7:16: error: field ‘fridge’ has incomplete type