[LLVMdev] linux mixed 32/64 systems
Nathan.Keynes at Sun.COM
Tue Mar 10 02:25:05 CDT 2009
On 10/03/2009, at 1:25 PM, Nick Lewycky wrote:
> Currently the build systems sets ARCH based on the result of 'uname -
> On a mixed 32/64 system (one with a 64-bit kernel and a 32-bit
> userspace) this will result in "x86_64" which is wrong.
> We'd like the ARCH variable to represent the userspace we're compiling
> in/for, not what the kernel happens to be.
> Does anyone know of a clean way to detect this sort of system
Cleanest way is probably to explicitly test if __x86_64__ is defined, ie
error: Not x86-64 even if uname says so!
Or in the alternative you can always key off sizeof(void *) == 8.
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