FULL PRODUCT VERSION :
Sun C++ 5.9 DEV 2006/06/08

ADDITIONAL OS VERSION INFORMATION :
Linux 2.6.9-34.ELsmp - Red Hat EL4

A DESCRIPTION OF THE PROBLEM :
When using -Ox and -m32 the macro __i386__ is not defined.

Command line to reproduce:

CC -m32 -O2 dummy.cpp


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
echo "" > dummy.cpp
CC -m32 -O2 -xdumpmacros dummy.cpp | & grep __i386__

No output is produced. When run without the -O2 flag the macro is defined:

CC -m32 -xdumpmacros dummy.cpp | & grep __i386__
#define __i386__ 1

This is a problem because a lot of gnu headers use the __i386__ macro. Specific example


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Expect the __i386__ macro to be defined in this case.
ACTUAL -
Macro is not defined.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
echo "" > dummy.cpp
CC -m32 -O2 -xdumpmacros dummy.cpp | & grep __i386__
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
CC -m32 -D__i386__ -O2 dummy.cpp
Posted Date : 2006-07-18 16:36:33.0

N/A

__i386__ should be defined on Linux (but not on Solaris), same as C driver.
Posted Date : 2006-07-18 20:17:28.0

It is a typo. see suggested fix
Posted Date : 2007-02-16 20:39:42.0