libspl: Fix incorrect use of platform defines on sparc64

libspl tries to detect sparc64 by checking whether __sparc64__
is defined. Unfortunately, this assumption is not correct as
sparc64 does not define __sparc64__ but it defines __sparc__
and __arch64__ instead. This leads to sparc64 being detected
as 32-Bit sparc and the build fails because both _ILP32 and
_LP64 are defined in this case.

To fix the problem, remove the checks for __sparc64__ and
just check __arch64__ if a sparc host was previously
detected with __sparc__.

Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: John Paul Adrian Glaubitz <[email protected]>
Closes #5913 

0 files changed, 0 insertions, 0 deletions