Re: Identifying 32 vs 64 bit OS?
On Monday, 11 August 2014 at 06:17:22 UTC, ketmar via Digitalmars-d-learn wrote: On Mon, 11 Aug 2014 05:18:59 + Jeremy DeHaan via Digitalmars-d-learn digitalmars-d-learn@puremagic.com wrote: why do you need that info? D types has well-defined sizes (i.e uint is always 32 bits, and so on). I came up with a better solution for what I actually needed, but I was toying with some things in a rdmd build script for different kinds of compilation.
Re: Identifying 32 vs 64 bit OS?
On Mon, 11 Aug 2014 05:18:59 + Jeremy DeHaan via Digitalmars-d-learn digitalmars-d-learn@puremagic.com wrote: why do you need that info? D types has well-defined sizes (i.e uint is always 32 bits, and so on). you still can check pointer size -- (void *).sizeof. but i'm pretty sure that you don't really need to do that unless you want to store pointers in files (and this is almost completely useless anyway). signature.asc Description: PGP signature
Re: Identifying 32 vs 64 bit OS?
On 11/08/14 07:18, Jeremy DeHaan wrote: I am looking at these versions as described here: http://dlang.org/version.html There are X86 and X86_64 version identifiers, but these specifically mention that they are versions for the processor type. Can they also be used to determine if the OS is running in 32 vs 64 bits? Use D_LP64. This indicates pointers are 64 bits. -- /Jacob Carlborg
Re: Identifying 32 vs 64 bit OS?
On Monday, 11 August 2014 at 05:19:01 UTC, Jeremy DeHaan wrote: I am looking at these versions as described here: http://dlang.org/version.html There are X86 and X86_64 version identifiers, but these specifically mention that they are versions for the processor type. Can they also be used to determine if the OS is running in 32 vs 64 bits? They mean what the integer(or pointer) size for the executable code generated(change able with -m(32|64)) is when compiled. If you want to check if the target OS(not your code) is running 32 vs 64 bit you have to do system call for your target OS.
Re: Identifying 32 vs 64 bit OS?
On Monday, 11 August 2014 at 07:58:15 UTC, Freddy wrote: If you want to check if the target OS(not your code) is running 32 vs 64 bit you have to do system call for your target OS. Not the OS, but a special CPU instruction: isX86_64() in core.cpuid?
Re: Identifying 32 vs 64 bit OS?
On Mon, 11 Aug 2014 12:51:40 + via Digitalmars-d-learn digitalmars-d-learn@puremagic.com wrote: Not the OS, but a special CPU instruction: isX86_64() in core.cpuid? but there is ARM64 coming. and gdc, for example, will has no problems to support it out of the box due to using gcc cogegen. yes, i know that runtime should be fixed to, but what i want to say is: please, stop thinking that there is Only One 64-bit CPU. signature.asc Description: PGP signature
Identifying 32 vs 64 bit OS?
I am looking at these versions as described here: http://dlang.org/version.html There are X86 and X86_64 version identifiers, but these specifically mention that they are versions for the processor type. Can they also be used to determine if the OS is running in 32 vs 64 bits?
