changing staging layout based on MULTIMACH_TARGET_SYS

Hi,

Lately I've been encountering various build problems that are caused by OE lumping all my ARM build together in staging/arm-angstrom-linux-gnueabi, which isn't quite right for the following reasons:

* it mixes hard- and softfloat when doing armv5te and armv6 builds, which introduces subtle compilation problems. The resulting binaries work fine together on the target, as one would expect with EABI, but mixing them in staging leads to troubles

* In an ideal world we would use a single compiler version for all subarchs, but for arm we use 4.2.4 for armv4, armv4t, armv5te and armv6, but 4.3.1 for armv7a. C++ apps don't like that

* You can end up statically linking an armv6 lib into an armv5te application

The same problems exist for powerpc (ppc405 vs ppc603e).

The change basically boils down to this on bitbake.conf:

-STAGING_BINDIR_CROSS = "${STAGING_DIR_NATIVE}${layout_bindir}/${HOST_SYS}" +STAGING_BINDIR_CROSS = "${STAGING_DIR_NATIVE}${layout_bindir}/${MULTIMACH_HOST_SYS}"

-STAGING_DIR_HOST = "${STAGING_DIR}/${HOST_SYS}" +STAGING_DIR_HOST = "${STAGING_DIR}/${MULTIMACH_HOST_SYS}"

-STAGING_DIR_TARGET = "${STAGING_DIR}/${TARGET_SYS}" +STAGING_DIR_TARGET = "${STAGING_DIR}/${MULTIMACH_TARGET_SYS}"

Richard and I have been talking about this for a while now and the change landed in Poky last week.

This is however an ABI break for staging, so we need to do this as well:

@@ -11,7 +11,7 @@
 # that breaks the format and have been previously discussed on the 

mailing list

 # with general agreement from the core team.
 #
-SANITY_ABI = "1"
+SANITY_ABI = "2"
 SANITY_ABIFILE = "${TMPDIR}/abi_version"

And as the diff points out, ABI breaks have to be discussed on the mailinglist.

I'd like to apply this right after the toolchain build order changes to minimize the number of full rebuilds people have to do.

Comments, objections?

regards,

Koen

Hi,

+1 from me

Greetings

Florian

The dream of yesterday                  Florian Boor
is the hope of today                    Tel: +49 271-771091-15
and the reality of tomorrow.            Fax: +49 271-771091-19
[Robert Hutchings Goddard, 1904]        [email protected]

1D78 2D4D 6C53 1CA4 5588  D07B A8E7 940C 25B7 9A76