Re: Patch: A macro to test for gcc's version number

[Andreas Jaeger <aj at suse dot de>]

>>>>> Kaveh R Ghazi writes:

 > 	We do this often enough that it should be a macro in ansidecl.h:
>> #if (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7))

 > becomes:

>> #if HAVE_GCC_VERSION(2,7)

 > I'm not 100% happy with the name I chose, its kind of wordy.  Anyone
 > like one of these or can suggest something better?

 > IS_GCC(2,7)
 > MIN_GCC_VERS(2,7)
 > HAVE_GCC(2,7)

Just for your information:  glibc has the same problems with the
gcc version information.  glibc 2.2 will use the following construct:

/* Convenience macros to test the versions of glibc and gcc.
   Use them like this:
   #if __GNUC_PREREQ (2,8)
   ... code requiring gcc 2.8 or later ...
   #endif
   Note - they won't work for gcc1 or glibc1, since the _MINOR macros
   were not defined then.  */
#if defined __GNUC__ && defined __GNUC_MINOR__
# define __GNUC_PREREQ(maj, min) \
	((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
#else
# define __GNUC_PREREQ(maj, min) 0
#endif

Andreas
-- 
 Andreas Jaeger   
  SuSE Labs aj@suse.de	
   private aj@arthur.rhein-neckar.de