The C++ parser appears to ignore attributes that apply to nested declarators.
E.g. when trying to define an 'SImode-pointer to int' by
typedef int * __attribute__ ((mode (SI))) t;
on s390x-ibm-linux, the C++ parser silently ignores the attribute.
The following test case:
#include <stdio.h>
typedef int * __attribute__ ((mode (SI))) t;
int main (void)
{
t x;
printf ("%d %d\n", sizeof (x), sizeof (*x));
}
gives the correct result ("4 4") when compiled with gcc,
but the incorrect result "8 4" when compiled with g++.
[ For a simpler test case on systems without non-Pmode pointers,
try using an invalid mode like:
typedef int * __attribute__ ((mode (TI))) t;
With gcc, this gives an error; g++ accepts the code. ]
See the discussion at
http://gcc.gnu.org/ml/gcc/2004-10/msg01081.html
for further details.
--
Summary: Incorrect processing of __attribute__ by the C++ parser
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: uweigand at gcc dot gnu dot org
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18182
