[Bug c/18443] New: #pragma pack(1) breaks function pointer initialization

[davidm at hpl dot hp dot com]

An example says it all:

----------------------------------------------
$ cat t.c
#pragma pack (1)

typedef struct tbl_s {
        int (*func) (int);
} TBL;

static int
foo (int arg)
{
        return arg + 13;
}

TBL padTbl = {
        foo
};
$ cc -S t.c
$ cat t.s | tail -3
padTbl:
        data8.ua        foo#
        .ident  "GCC: (GNU) 3.3.5 (Debian 1:3.3.5-1)"
------------------------------------------

Note how the function pointer is being initialized with an ordinary reference to
"foo", instead of "@fptr(foo)".  As a result, any call through such a function
pointer will lead to an immediate crash.

This bug appears to be present in all versions of GCC which I have tested (3.2,
3.3, 3.4, and 4.0).

-- 
           Summary: #pragma pack(1) breaks function pointer initialization
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: davidm at hpl dot hp dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: ia64-linux
  GCC host triplet: ia64-linux
GCC target triplet: ia64-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18443