On 25 Jan 2010, at 5:51 pm, erik quanstrom wrote:
On Mon Jan 25 10:00:19 EST 2010, lyn...@orthanc.ca wrote:
i have a little program, aux/cpuid, that gets cpuid
information for x86 processors. clearly it's not going
to run on an arm or mips. is there a standard
trick for preventing such a program from being
built (and failing)? the hack i currently have is
objtype=386 as the first line of the mkfile.
Why not make it build everywhere and have it print a diagnostic for
platforms it doesn't support. E.g.
x86 assembly doesn't often assemble with an
arm assembler. :-)
- erik
Heh. :)
P9P uses a separate file for each arch: plan9/src/libthread/$os-$arch.s
Inferno uses a separate dir. Some of the dirs have C code instead
since the asm is only an optimisation in this case.
I'd put a test in the mkfile: if cpuid-$objtype exists build that,
else.. well, either error out or build cpuid-port.c which in turn
either emits an error at runtime or perhaps more usefully outputs the
contents of #P/cputype.
--
http://xkcd.com/676/
Ethan Grammatikidis
eeke...@fastmail.fm
