attribute mode is unknown (Sun cc)

[Torbjorn Granlund]

Jay K <jay.krell at cornell.edu> writes:

  "gmp-impl.h", line 2812: warning:  attribute "mode" is unknown, ignored
  "gmp-impl.h", line 2812: warning: attribute parameter "QI" is undefined
  "gmp-impl.h", line 2813: warning:  attribute "mode" is unknown, ignored
  "gmp-impl.h", line 2813: warning: attribute parameter "SI" is undefined
  "gmp-impl.h", line 2814: warning:  attribute "mode" is unknown, ignored
  "gmp-impl.h", line 2814: warning: attribute parameter "SI" is undefined
  "gmp-impl.h", line 2815: warning:  attribute "mode" is unknown, ignored
  "gmp-impl.h", line 2815: warning: attribute parameter "DI" is undefined
  "gmp-impl.h", line 2816: warning:  attribute "mode" is unknown, ignored
  "gmp-impl.h", line 2816: warning: attribute parameter "DI" is undefined
  
  
   cc -V
  cc: Sun C 5.9 SunOS_sparc Patch 124867-16 2010/08/11
  usage: cc [ options] files.  Use 'cc -flags' for details
  
  uname -a
  SunOS current9s 5.9 Generic_Virtual sun4u sparc SUNW,SPARC-Enterprise-T5220
  
OK, so have Oracle added some incompatible variant of GMP's attribute
extension?  Or is this some non-standard compiler from Oracle?

  diff -u -r1.5 gmp-impl.h
  --- gmp-impl.h    5 Nov 2010 11:45:44 -0000    1.5
  +++ gmp-impl.h    6 Nov 2010 16:57:29 -0000
  @@ -2808,7 +2808,7 @@
   
   
   /* Define stuff for longlong.h.  */
  -#if HAVE_ATTRIBUTE_MODE
  +#if HAVE_ATTRIBUTE_MODE && defined(__GNUC__)
   typedef unsigned int UQItype    __attribute__ ((mode (QI)));
   typedef         int SItype    __attribute__ ((mode (SI)));
   typedef unsigned int USItype    __attribute__ ((mode (SI)));
  
  
The correct fix for this is to tweak the feature test for
HAVE_ATTRIBUTE_MODE, leaving it undefined for compilers that do ot
really support it.

-- 
Torbjörn