From: "Iñaki Baz Castillo" <ibc@...>
Date: 2012-06-02T04:25:06+09:00
Subject: Re: [C exten] extconf.rg and #ifdef

2012/5/31 Eric Hodel <drbrain@segment7.net>:
> On May 28, 2012, at 03:57, Iñaki Baz Castillo wrote:
>
>> Hi, depending whether my Ruby C extension is being compiled on *nix or
>> Windows, I need some #defines (i.e: OS_UNIX or OS_WIN).
>>
>> I see no way in MKMF documentation to generate a #define (based on
>> RbConfig["host_os"] for example).
>
> Do not use host_* values from rbconfig.rb.
>
> Use target_* values from rbconfig.rb.
>
> Using host_* is wrong.
>
> The host_* values come from host that compiled ruby.  When ruby is cross-compiled these values won't match the target and your gem will fail to compile.
>
> You should use target_* values as these values match the target ruby was compiled for.
>
> See: http://sources.redhat.com/autobook/autobook/autobook_261.html


Good to know. Thanks a lot.


-- 
Iñaki Baz Castillo
<ibc@aliax.net>