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Re: [Tinycc-devel] [PATCH] allow to tell a target ARCH to a configure sc

From: Sergey Korshunoff
Subject: Re: [Tinycc-devel] [PATCH] allow to tell a target ARCH to a configure script
Date: Sun, 4 Jan 2015 19:37:39 +0300

As suggested on another forum, there is a "setarch linux32" command
for changing ARCH reported by "uname -m".

2015-01-04 2:45 GMT+03:00, Thomas Preud'homme <address@hidden>:
> Le mardi 30 décembre 2014, 11:05:15 Sergey Korshunoff a écrit :
>> Problem: configure in 32bit userspace running on 64bit kernel is
>> trying to compile tcc for ARCH=x86_64. Expecting behavior: to
>> configure a tcc for ARCH=x86
>> This patch will allow to specify/configure a target cpu. Examples:
>>       ARCH=x86 ./configure
>>       ARCH=x86_64 ./configure
>> If ARCH is not specified then try to detect a current cpu type by
>> examining arch of the host_cc.
> The principle is nice but the code style looks different from the rest and a
> bit complicated for what it is. Why using a subscript for instance? Why not
> nesting if?
> Finally, you could instead of using readelf use a carefully crafted conftest
> that would give you whether userspace is 32bit of 64bit. The structure would
> then look like this:
> if ARCH is defined, then use it
> else use uname
> if cpu is x86_64 and conftest gives 32bit, cpu=i386.
> What do you think?
> Best regards,
> Thomas

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