On 7/4/2014 12:08 AM, Hans-Peter Nilsson wrote:
Currently, c-cppbuiltin.c doesn't provide proper defines for this support.
> >We
> >currently define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4, etc, in
> >pa-linux.h.
I thought that was cheating! 1/2:)
> I'll experiment with defining ATOMIC_INT_LOCK_FREE there.
>
>It should already be defined,
Yes, if the proper insn patterns are in place, those macros are
automatically defined. They aren't if library functions are
called, regardless of lock-freelessness of those functions.
That is the problem. I added the __GCC_HAVE_SYNC_COMPARE_AND_SWAP
defines when I saw that the library implementation was being detected
by some packages.
Trying an even bigger cheat:
#define HAVE_sync_compare_and_swapqi 1
#define HAVE_sync_compare_and_swaphi 1
#define HAVE_sync_compare_and_swapsi 1
This seems to give __GCC_ATOMIC_INT_LOCK_FREE = 2, etc.
Have to see if this works with our library functions :-
Dave
--
John David Anglin dave.ang...@bell.net
