[Bug c/50987] New: powerpc: size of unnamed array is negative when compiling wine

[austinenglish at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50987

             Bug #: 50987
           Summary: powerpc: size of unnamed array is negative when
                    compiling wine
    Classification: Unclassified
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: austinengl...@gmail.com


Found while compiling wine on PowerPC. This did not occur on an older powerpc I
used on the gcc compiler farm, but I'm not sure what gcc/glibc/etc. versions
they had.

Bug is present in, at least:
gcc-4.0.0
gcc-4.1.0
gcc-4.2.0
gcc-4.6.1
trunk 4.7.0 20111103

reduced testcase:
[austin@gcc1-power7 tests]$ cat generated.i
 typedef int BOOL, *PBOOL, *LPBOOL;
 typedef int INT, *PINT, *LPINT;
  typedef struct _CACHE_DESCRIPTOR {     BYTE Level;     BYTE Associativity;   
 WORD LineSize;     DWORD Size;     PROCESSOR_CACHE_TYPE Type; }
 *HDC;
  typedef BOOL ( *ABORTPROC)(HDC, INT);
   static void test_pack_ABORTPROC(void) { extern void __C_ASSERT__(int
[(sizeof(ABORTPROC) == 4)?1:-1]); TEST_TYPE_ALIGN (ABORTPROC, 4) }

gcc generated.i
generated.i:3:18: error: unknown type name 'BYTE'
generated.i:3:18: error: unknown type name 'BYTE'
generated.i:3:18: error: unknown type name 'WORD'
generated.i:3:18: error: unknown type name 'DWORD'
generated.i:3:18: error: unknown type name 'PROCESSOR_CACHE_TYPE'
generated.i: In function 'test_pack_ABORTPROC':
generated.i:6:4: error: size of unnamed array is negative
generated.i:6:124: error: expected expression before 'ABORTPROC'
generated.i:6:138: error: expected ';' before '}' token

if you have wine available, try compiling dlls/gdi32/tests/generated.c

[austin@gcc1-power7 tests]$ uname -a
Linux gcc1-power7.osuosl.org 3.1.0-0.rc9.git0.2.fc16.kh.ppc64 #1 SMP Wed Oct 12
22:41:01 UTC 2011 ppc64 ppc64 ppc64 GNU/Linux

the same works on (at least) x86/x86_64.

See also http://bugs.winehq.org/show_bug.cgi?id=28981