Re: [boost] [predef] Status and review results?

On Tue, Apr 23, 2013 at 10:08 AM, Petr Machata wrote:

Bjorn Reese writes:

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On 04/23/2013 05:45 AM, Rene Rivera wrote:

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On Mon, Apr 22, 2013 at 10:57 AM, Petr Machata wrote:

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It's intentional. As, AFAIK, PA-RISC is the common name for that architecture. And also the macros it's based on for the version information are also PA_RISC.

I think he is refering to the RISK versus RISC spelling.

Yes, that was my point.

D'oh.. Yes, it's a typo :-\

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I can't claim to know much about those.. But is __SYSC_ZARCH__ enough ro match any z/Architecture regardless of the s390 defines? If you think those

Not really. __SYSC_ZARCH__ is only defined by the Dignum Systems/C++ compiler.

Right. What I meant to say was that __SYSC_ZARCH__ is not defined by GCC at all. On GCC, __s390__ is the define for both, and __s390x__ explicitly for the 64-bit one.

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I always considered the relation betwenn z/Architecture and s390 to be approximately the same as between i386 and x86_64. Maybe it would make sense to have an overarching is-z-system define, similar to BOOST_ARCH_X86? No idea what to call it though.

Hm.. Perhaps. Is that a popular understanding of those architectures?

z/Architecture is LP64, and is backwards compatible with System/390 which is ILP32 (well almost, as pointers are only 31-bits wide.) See:

Right. To answer the original question, yes, I believe that's a popular understanding. E.g. GCC for s390x can produce s390 binaries when given the -m31 command-line option. strace and ltrace compiled for s390x can "cross-trace" s390 processes. 64-bit s390x Linux kernel supports launching processes in 31-bit execution mode. Etc. Exactly the same as for x86_64/x86 or ppc64/ppc.

OK, thanks for the clarifications. I'd say it's then safe to add a category for those. Perhaps ARCH_SYSZ. And the defs could be ARCH_SYSZ_64 and ARCH_SYSZ_S390 (and dropping 370). -- -- -- Grafik - Don't Assume Anything -- Redshift Software, Inc. - http://redshift-software.com -- rrivera/acm.org - grafik/redshift-software.com -- 102708583/icq - grafikrobot/aim - grafikrobot/yahoo