404272 - treat HAVE_LONG_LONG nicely

Status: RESOLVED FIXED

Description

[Edwin van Vliet]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.9) Gecko/20071025 Firefox/2.0.0.9
Build Identifier: 

If NSPR is used with other projects, especially GNU projects, HAVE_LONG_LONG is already defined by the configure script, through AC_CHECK_TYPES([long long])
Since this is fairly reasonable to do, I think NSPR should not try to redefine the value so the strict preprocessors/compilers won't complain about HAVE_LONG_LONG being redefined.

Reproducible: Always

Steps to Reproduce:
#define HAVE_LONG_LONG
#include <nspr/prio.h> /* or another nspr header */
Actual Results:  
In file included from /usr/include/nspr/prtypes.h:58,
                 from /usr/include/nspr/prlong.h:49,
                 from /usr/include/nspr/prio.h:48,
                 from jsfile.c:91:
/usr/include/nspr/prcpucf.h:633:1: warning: "HAVE_LONG_LONG" redefined
<command line>:1:1: warning: this is the location of the previous definition 

Expected Results:  
The compiler should not complain for the headers shouldn't define HAVE_LONG_LONG if it is already defined.

Comment 1

[Edwin van Vliet]

Attachment: Wrap #define HAVE_LONG_LONG in #ifndef structures

This is a patch for the latest version fromthe HEAD branch in CVS.

Comment 2

[Wan-Teh Chang]

Do you think we should define HAVE_LONG_LONG as 1?

Thanks for the patch.

Comment 3

[Edwin van Vliet]

It should not be necessary, the only reason that HAVE_LONG_LONG is defined, is for checking it with #ifdef, #ifndef, etc. The actual value should never be used. But it can't hurt to define it to 1. Autoconf/configure scripts define HAVE_* as 1

Comment 4

[Wan-Teh Chang]

Edwin, there are several more files that need to be patched.
(They have a tab character between #define and HAVE_LONG_LONG,
which must be why you missed them.)  Since it is tedious to
change so many files, I just want to make sure you're running
into this problem in practice.

Comment 5

[Wan-Teh Chang]

I've extended Edwin's patch to all the files that need to be
patched.  I will check it in next week.

Comment 6

[Wan-Teh Chang]

Attachment: Wrap #define HAVE_LONG_LONG in #ifndef structures (as checked in)

This patch extends Edwin's patch to all the *.cfg files that need this change.

I've checked in this patch on the NSPR trunk for NSPR 4.7.