Re: processor compatibility when building packages

[Christopher Faylor <cgf at redhat dot com>]

On Sun, Oct 14, 2001 at 08:22:58AM +1000, Danny Smith wrote:
>This topic came up about a year ago on this list: 
>http://sources.redhat.com/ml/cygwin-apps/2000-07/msg00039.html
>
>and I've recently raised it again on mingw lists.
>
>Looking at cygwin's spec file it says:
>
>
>*cpp_cpu_default:
>%(cpp_686)
>
>
>To me that means that, unless user overrides with command line -march or
>-mcpu option, code is tuned for i686.  To get that into the specs file, one
>has to either configure gcc so that TARGET_CPU_DEFAULT=3 (=pentium) or pass
>that define to make when building gcc.

I do neither of those things when configuring gcc for cygwin.

I do configure everything as i686-pc-cygwin, though.

>That interpretion is different from the conclusion that was posted in the
>message pointed to above, which says that cygwin-produced code will run on
>any i[35467]86 arch.  
>
>I'm not talking about the platform triplet moniker -- that I realise is
>just a name.  I'm asking: Has anyone complained that cygwin-built apps fail
>on i386 but not on i686? 

Nope, never.

cgf