cc65 compiler error at "offsetof" on AtariXL target of AdvSkel65 only?

[Harry Potter]

Hi!  I am working on my AdvSkel65 program and gained considerable ground with debugging and optimizing.  However, the 64k AtariXL port is giving me an error message on a line containing "offsetof" and is stating that it is an undefined function.  I also get two errors immediately after: one says that I can't mix declarations and code, and the other says that cc65 expects an integer expression.  Following are gthe troublesome function declaration:

-------------------------

//Second part of player init routine.  To be stored in a stub.
void InitPlayer2 (void)
{
    //for (i=8; i;) {--i; Player.Inv[i]=Player.ExitRoom=-1;}
    memset (&Player, 0, sizeof(Player));
    __asm__ (
        "\tlda\t#255\n"
        "\tldx\t#7\n"
        "@a01:\n"
        //"\tinc\t$C00\n"
        "\tsta\t%v+%w,x\n"
        "\tdex\n"
        "\tbpl\t@a01\n",
        Player, offsetof (struct player_, Inv)
        );
#if defined __C128__ || defined __APPLE2ENH__
    printscr("What is your name?  (No more\n"
         "than 15 characters)?");
    GetInput (Player.Name, 15);
#endif
    //Player.ExitRoom=-1;
    //Player.Money    =2000;
#ifdef __USEFARMEM__
#if defined __APPLE2ENH__ || defined __ATARIXL__
    aux_memcpyfrom (&Player.RoomInv, &DefRoomItems, (NumItems<<3));
#elif defined __PLUS4__ || defined __C128__
    bank1_memcpyfrom (&Player.RoomInv, &DefRoomItems, (NumItems<<3));
    //bank1_memcpyfrom (0xC00, &DefRoomItems, (NumItems<<3));
#elif defined __C64__
    hmemcpy (&Player.RoomInv, &DefRoomItems, (NumItems<<3));
#else
    memcpy (&Player.RoomInv, &DefRoomItems, (NumItems<<3));
#endif
#else
    memcpy (&Player.RoomInv, &DefRoomItems, (NumItems<<3));
#endif
    CRoom=0;
//printc ('.');
}
-----------------------

and the line to compile the code:

------------------------------

cl65 --cc-args --all-cdecl -C atarixl_small.cfg -t atarixl -Wl -D__SYSTEM_CHECK__=1 -Cl -Ors -o autorun.sys atari8_crt0.s player.c rooms.c words.c wordsdb.c wordsdb2.c printtok.c printi.s atasimpleio_xl.lib ataricio.lib

[Wrathchild]

A clue could be that offsetof isn't a function, so check that stddef.h is included: https://www.cc65.org/doc/funcref-161.html

[Harry Potter]

Okay.  I'll try that now. 

[Harry Potter]

It worked!  Thanks! 

[Wrathchild]

How do the other targets work then?

[Harry Potter]

I don't know, but they were, and now, the problem is fixed.

[Wrathchild]

would be worth tracing why as if the include is commented out then it should not work for other platforms.

it implies that stddef is being included elsewhere for other platforms but not the Atari

[Harry Potter]

Well...the 128k Atari XL version compiled successfully.  But it works now. 

[sanny]

40 minutes ago, Wrathchild said:

would be worth tracing why as if the include is commented out then it should not work for other platforms.

it implies that stddef is being included elsewhere for other platforms but not the Atari

My impression is that @Harry Potter isn't caring why something is working or not. When it is working he is happy 🙂

[+Stephen]

48 minutes ago, sanny said:

My impression is that @Harry Potter isn't caring why something is working or not. When it is working he is happy 🙂

It's an unfortunately all too common coding style called "throw shit at the wall and see what sticks"