[FFmpeg-devel] [PATCH] read_time() for SPARC

[Jeff Downs]

On Thu, 9 Sep 2010, Michael Kostylev wrote:
> Speaking of macros:
> 
> % gcc -E -xc -dM /dev/null | grep 'arch\|sparc'
> #define sparc 1
> #define __sparc__ 1
> #define __sparc 1
> #define __sparc_v8__ 1

While not particularly relevant to the ongoing discussion, for 
completeness please note this is only true for gcc >= 4.2.  On earlier 
versions, __sparc_v8__ will not be defined.
Also, for Sparc/Solaris, it is __sparcv8.

> % gcc -mcpu=v9 -E -xc -dM /dev/null | grep 'arch\|sparc'
> #define sparc 1
> #define __sparc__ 1
> #define __sparc 1
> #define __sparc_v9__ 1

More relevant here, the above is not the case with any (32-bit defaulting) 
gcc I tried on Sparc/Solaris.  The __sparc_v9__ define is not present, 
only __sparcv8

> % gcc -m64 -E -xc -dM /dev/null | grep 'arch\|sparc'
> #define sparc 1
> #define __sparc__ 1
> #define __sparc 1
> #define __arch64__ 1

Here, sparc/solaris adds __sparcv9


> % gcc -m64 -mcpu=ultrasparc -E -xc -dM /dev/null | grep 'arch\|sparc'
> #define sparc 1
> #define __sparc__ 1
> #define __sparc 1
> #define __sparc_v9__ 1
> #define __arch64__ 1

And here results are the same except that it is __sparcv9 for 
Sparc/Solaris.

	-Jeff