This is the mail archive of the mailing list for the GCC project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]

Re: 3.0.1 & Solaris 8

On Tue, Aug 07, 2001 at 02:47:27PM -0700, Bruce Korb wrote:
> I was looking at GCC on Solaris, when I just noticed something.
> gcc -mcpu=v9 causes __sparc_v9__ to be defined, but not __sparcv9.
> I'm sure somewhere in the archives this must have been discussed,
> but it is clearly wrong.  _all_ the system headers depend upon
> __sparcv9 being defined for 64 bit land.  Maybe it isn't ready for
> prime time yet, but then I would think you would just suppress the
> "-mcpu=v9" thing instead of the define.  It seems to me we should
> add __sparcv9 to the specs for Solaris8, or drop the mcpu.

No, -mcpu=v9 means generate code for SPARC v9 chip, it does not say anything
about whether it should be 32-bit or 64-bit.
If you want 64-bit code, you should use -m64 option (unless 64-bit is the
default, depending on how gcc was configured).
And in that case, __sparcv9 will be defined (on Solaris, in Linux
__arch64__). -m32 -mcpu=v9 just generates 32-bit code which can use
instructions which are not present in SPARC v8 ISA.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]