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Date: Sat, 03 Dec 2005 19:37:00 -0000
Subject: [Bug c/25246]  New: [gomp] #pragma pack() inside of structure
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From: "jakub at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
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#pragma pack(1)
struct S
{
  char h;
  int i;
#pragma pack()
  int j;
};
struct S s;
void *i = &s.i, *j = &s.j;

(distilled from Linux kernel) used to compile in 4.0.x, though the whole struct
wasn't really packed at all (i at offset 4, j at offset 8).
gomp #pragma handling rejects this.

Another testcase is:
#pragma pack(1)
struct S
{
  char h;
  struct T { int h1; char h2[3]; } t;
  int i;
#pragma pack()
  int j;
};
struct S s;
void *i = &s.i, *j = &s.j;
void *h1 = &s.t.h1, *h2 = &s.t.h2[0];

Here, h1 was s+1, h2 s+5, i s+8 and j s+12, i.e. struct T used to be packed
and struct S wasn't packed.


-- 
           Summary: [gomp] #pragma pack() inside of structure
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Keywords: openmp
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jakub at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25246