[Buildroot] [PATCH v2] package/uclibc: Enable compile in thumb mode configuration option
Arnout Vandecappelle
arnout at mind.be
Fri Dec 18 21:55:50 UTC 2015
Hi Paul,
[Please don't top-post, but reply inline like I do below.]
On 18-12-15 01:11, Paul Enman wrote:
> Hi All,
> Thanks for your feedback and insight. Buildroot does build a working Cortex-M
> (thumb instructions only) uClibc toolchain by touching up the uClibc(-ng) config
> file with
>
> Enable COMPILE_IN_THUMB_MODE
> and
> Disable UCLIBC_HAS_CONTEXT_FUNCS
>
> ARMv5 and thumb1 targets shouldn't be effected by this patch; I'll look into
> guarding packages that depend on (obsolescent?) context control functions and
> prepare an updated version for review.
It will be quite hard to find such packages - especially longer term. There
probably should be a thumb2 toolchain added to the autobuilders to cover this case.
Also, finding a good explanation for the comment is going to be difficult...
Something like "foo needs ARM instructions or a (e)glibc or musl toolchain".
Regards,
Arnout
> The toolchain compiles a bootable kernel and both Linuxthreads and NPTL build
> without error, however I am looking into why flthdr shows busybox bFLT flags are
> set to 0x2 (Has-PIC-GOT).
[snip]
--
Arnout Vandecappelle arnout at mind be
Senior Embedded Software Architect +32-16-286500
Essensium/Mind http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint: 7493 020B C7E3 8618 8DEC 222C 82EB F404 F9AC 0DDF
More information about the buildroot
mailing list