[Bug target/30336] New: -mtune=native is wrong when not built with gcc

["hjl at lucon dot org" <gcc-bugzilla at gcc dot gnu dot org>]

When gcc isn't built with gcc, we get

  if (arch)
    {   
      /* FIXME: i386 is wrong for 64bit compiler.  How can we tell if
         we are generating 64bit or 32bit code?  */
      cpu = "i386";
    }   
  else
    cpu = "generic";

It is suggested to use size of (void *):

http://gcc.gnu.org/ml/gcc/2006-12/msg00651.html

However, it only checks the pointer size  of the compiler which  is used to
build
gcc, not the pointer size of the gcc.


-- 
           Summary: -mtune=native is wrong when not built with gcc
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hjl at lucon dot org
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30336