How to request -mthumb to be applied to all tools built for arm

[Yann E. MORIN]

Hello Lev, All,

On Thursday 31 December 2009 10:32:27 lev@lingnu.com wrote:
> I took the Mercurial snapshot a5020a1facff
> 1. ./configure --local
>     Refused to accept local

What's the exact message it printed ?

> 2. ./configure
>     complains to the absebce of hg (mercurial) and stops

Yes, it is expected that people that use a snapshot (or a clone) of
the repository will do changes in the code, and eventually submit those
changes, so it is expected they have Mercurial installed.

> 3. ct-ng build with config set as
>    CT_ARCH_ARM_MODE_THUMB=y
>    CT_ARCH_ARM_INTERWORKING=y

I guess if you want Thumb, you do not necessarily need Interworking.
And the other way around.

It is to be noted, however, that the EABI mandates interworking support.

>    fails in
> DEBUG]    ==> Executing: 'make -j1 CROSS=arm-unknown-linux-uclibcgnueabi-

To my knowledge, neither glibc, eglibc nor uClibc builds in Thumb-only mode.
You may have the best luck with eglibc, but that's not guaranteed.

For now, you're stuck with building a bare-metal toolchain with newlib.

I know the guys at ARM managed to build a Linux kernel using pure Thumb2,
and that it's now mainline, but so far I have not seen any 'Linux' libc
build in pure Thumb mode.

Regards,
Yann E. MORIN.

-- 
.-----------------.--------------------.------------------.--------------------.
|  Yann E. MORIN  | Real-Time Embedded | /"\ ASCII RIBBON | Erics' conspiracy: |
| +33 662 376 056 | Software  Designer | \ / CAMPAIGN     |  ___               |
| +33 223 225 172 `------------.-------:  X  AGAINST      |  \e/  There is no  |
| http://ymorin.is-a-geek.org/ | _/*\_ | / \ HTML MAIL    |   v   conspiracy.  |
`------------------------------^-------^------------------^--------------------'



--
For unsubscribe information see http://sourceware.org/lists.html#faq