clone 356548 -1
reassign -1 par2cmdline
tags 356548 + upstream
forwarded 356548 http://gcc.gnu.org/PR26670
thanks
Ben Hutchings <[EMAIL PROTECTED]> writes:
> Martin Michlmayr wrote:
>> I don't understand the problem. Ben (CCed) made a suggestion, but
>> afaik he hasn't been able yet to come up with a simple test case.
>
> I have now, and it isn't MIPS-specific:
>
> class le
> {
> protected:
> int value;
> };
>
> struct MD5Hash
> {
> MD5Hash(const MD5Hash &);
> char hash[16];
> };
>
> struct PACKET_HEADER
> {
> le length;
> MD5Hash setid;
> } __attribute__ ((packed));
>
> struct MAINPACKET
> {
> PACKET_HEADER header;
> MD5Hash fileid[0];
> } __attribute__ ((packed));
>
> const MD5Hash& FileId(const char *packetdata, int filenumber)
> {
> return ((const MAINPACKET*)packetdata)->fileid[filenumber];
> }
>
> const MD5Hash& SetId(const char *packetdata)
> {
> return ((const MAINPACKET*)packetdata)->header.setid;
> }
>
> // END
>
> SetId provokes the error; FileId doesn't.
The problem is that the packedness of MAINPACKET::header isn't
ignored.
Note also that the program will not work as intended, because (as soon
as gcc is fixed) all the packedness is ignored. So I clone this bug.
--
Falk
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