[U-Boot] [PATCH v4 0/6] Enable Thumb build for ARM platforms

Wolfgang Denk wd at denx.de
Thu Mar 15 21:46:15 CET 2012

Dear Tom Rini,

In message <20120315202316.GA6855 at bill-the-cat> you wrote:
> So, the (normally?) required to work toolchains are ELDK 5.1 and ELDK
> 4.2.  5.1 is fine but with 4.2 (gcc 4.2.2) we get two warnings for every
> file about interworking/thumb not being supported.  Further, the
> resulting binary doesn't boot.
> However, is this really a problem?  I don't imagine folks using ELDK
> 4.2-era tools on OMAP5, and I have a tough time imaging them using it
> for OMAP4.

I don't consider it a big problem (just a bit sad) if  ELDK 4.2 cannot
be used for building these.  However, I think it is not acceptable
tobuild known-to-be-broken images.  If the tool chain is too old, this
shall result in a clear error message and abort of the build.

Why is thumb mode needed for these boards?  Just because of image

Best regards,

Wolfgang Denk

DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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