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Re: [Patch, AArch64, ILP32] 5/5 Define _ILP32 and __ILP32__

On 06/27/13 01:56, Joseph S. Myers wrote:

On Wed, 26 Jun 2013, Yufeng Zhang wrote:


This patch defines _ILP32 and __ILP32__ for the AArch64 port when the ILP32
ABI is in use.

This helps libraries, e.g. libgloss and glibc, recognize which model is being
compiled.


GCC already defines _LP64 and __LP64__ in architecture-independent code
for LP64 systems.  Libraries can use those to distinguish the two models
for AArch64, so I don't see any need to add architecture-specific macros
with the opposite sense.
We need a reliable way to tell we are compiling for ILP32. On one hand LLP64 support may be added in the future; on the other hand, not all AArch64 compilers may define _LP64 and __LP64__. 

Other ports like x86_64, ia64-hpux and pa-hpux also define one or both.

Thanks,
Yufeng
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