preprocessor/5806: The preprocessor evaluates expression s in 64-bit, violating IS C++ 16.1.4

[Dana, Eric]

The following reply was made to PR preprocessor/5806; it has been noted by GNATS.

From: "Dana, Eric" <Eric_Dana@bmc.com>
To: "'Zack Weinberg'" <zack@codesourcery.com>,
   "Dana, Eric"
	 <Eric_Dana@bmc.com>
Cc: "'Neil Booth'" <neil@daikokuya.demon.co.uk>,
   "'gcc-gnats@gcc.gnu.org'"
	 <gcc-gnats@gcc.gnu.org>,
   "Schoeller, Dick" <Dick_Schoeller@bmc.com>
Subject: RE: preprocessor/5806: The preprocessor evaluates expression s in
	 64-bit, violating IS C++ 16.1.4
Date: Fri, 15 Mar 2002 10:37:47 -0600

 Zack,
 
    The config.guess output is: i386-sequent-sysv4
    One possibility is to change the '#if ((~0UL) == 0xffffffffUL)' to
    '#if defined(__i386__)' which is predefined in the gcc compiler.
    You may have a better suggestion... Tnx...
 
 --Eric--
 
 -----Original Message-----
 From: 'Zack Weinberg' [mailto:zack@codesourcery.com] 
 Sent: Thursday, March 14, 2002 6:15 PM
 To: Dana, Eric
 Cc: 'Neil Booth'; 'gcc-gnats@gcc.gnu.org'; Schoeller, Dick
 Subject: Re: preprocessor/5806: The preprocessor evaluates expression s in
 64-bit, violating IS C++ 16.1.4
 
 
 On Thu, Mar 14, 2002 at 02:58:41PM -0600, Dana, Eric wrote:
 > Zack,
 > 
 >    Is there anything that can be done for 3.1? In it's present state,
 >    Dynix cannot work properly as many of its include files test for
 >    32/64 bit using the preprocessor. For example:
 > 
 > 	#if ((~0UL) == 0xffffffffUL)
 > 	typedef unsigned int    size_t;         /* ILP32 size_t */
 > 	#else /* ((~0UL) == 0xffffffffUL) */
 > 	typedef unsigned long   size_t;         /* LP64 size_t */
 > 	#endif /* ((~0UL) == 0xffffffffUL) */
 
 In the short term, a fixincludes hack is probably the right move.  GCC
 almost certainly provides a predefined macro that you can use to
 detect the mode you're in -- tell me the output of config.guess and I
 can figure out what it should be.  Then you have fixincludes look for
 that #if and change it to an appropriate test of the macro.
 
 zw