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Re: mthumb in specs file

From: James E Wilson <wilson at specifixinc dot com>
To: Shaun Jackman <sjackman at gmail dot com>
Cc: gcc at gcc dot gnu dot org
Date: Thu, 10 Mar 2005 14:15:48 -0800
Subject: Re: mthumb in specs file
References: <7f45d93905022415022c8410aa@mail.gmail.com>

Shaun Jackman wrote:

Is it possible by hacking the specs file to change the target for
arm-elf-gcc from -marm to -mthumb? I tried a few obvious things like
changing marm in *multilib_defaults to mthumb, but this did not have
the desired effect.

You have to do more than that. multilib_defaults only controls what libraries we link against. You also need to pass -mthumb by default to cc1 and perhaps also the assembler and linker. Try using gcc -v -mthumb and comparing the result against gcc -v, and then writing specs that mimic what -v -mthumb does. -- Jim Wilson, GNU Tools Support, http://www.SpecifixInc.com

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