[OE-core] Does support for external toolchains working in current OE?

[Martin Jansa]

On Sat, Apr 06, 2013 at 12:10:01AM +0200, Martin Jansa wrote:
> I've already tried that, systemd's configure does not respect that.

I've patch for systemd which "fixes" this:

diff --git a/meta/recipes-core/systemd/systemd_199.bb b/meta/recipes-core/systemd/systemd_199.bb
index e574548..2bb9566 100644
--- a/meta/recipes-core/systemd/systemd_199.bb
+++ b/meta/recipes-core/systemd/systemd_199.bb
@@ -76,6 +76,15 @@ EXTRA_OECONF_append_libc-uclibc = " --disable-myhostname "
 do_configure_prepend() {
        export CPP="${HOST_PREFIX}cpp ${TOOLCHAIN_OPTIONS} ${HOST_CC_ARCH}"
 
+       # Allow to override them from shell variables with right prefix
+       # in some cases (external toolchain) HOST_PREFIX is not the same as HOST_SYS
+       sed -i "s#AC_PATH_TOOL(OBJCOPY,#AC_CHECK_TOOL(OBJCOPY,#g; \
+               s#AC_PATH_TOOL(STRINGS,#AC_CHECK_TOOL(STRINGS,#g; \
+               s#AC_PATH_TOOL(GPERF,#AC_CHECK_TOOL(GPERF,#g" ${S}/configure.ac
+       # OBJCOPY is already exported by default
+       export STRINGS="${HOST_PREFIX}strings"
+       export GPERF="${HOST_PREFIX}gperf"
+
        sed -i -e 's:=/root:=${ROOT_HOME}:g' units/*.service*
 }
 
But I'm still looking for some more global solution, what can go wrong when
external toolchain overwrites HOST_SYS to match overwritten TARGET_PREFIX?

e.g.
tcmode-external-sourcery.inc:TARGET_PREFIX = "${CSL_TARGET_SYS}-"

bitbake.conf:
HOST_ARCH = "${TARGET_ARCH}"
HOST_OS = "${TARGET_OS}"
HOST_VENDOR = "${TARGET_VENDOR}"
HOST_SYS = "${HOST_ARCH}${HOST_VENDOR}-${HOST_OS}"
HOST_PREFIX = "${TARGET_PREFIX}"

TARGET_ARCH = "${TUNE_ARCH}"
TARGET_OS = "linux${LIBCEXTENSION}${ABIEXTENSION}"
TARGET_VENDOR = "-oe"
TARGET_SYS = "${TARGET_ARCH}${TARGET_VENDOR}${@['-' + d.getVar('TARGET_OS', True), ''][d.getVar('TARGET_OS', True) == ('' or 'custom')]}"
TARGET_PREFIX = "${TARGET_SYS}-"

So when external-tc changes TARGET_PREFIX, it modifies HOST_PREFIX and 
both are inconsistent with TARGET_SYS/HOST_SYS which is used by autoconf 
for AC_PATH_TOOL.

> On Sat, Apr 6, 2013 at 12:08 AM, Chris Larson <clarson at kergoth.com> wrote:
> 
> >
> > On Fri, Apr 5, 2013 at 2:20 PM, Martin Jansa <martin.jansa at gmail.com>wrote:
> >
> >> On Fri, Apr 05, 2013 at 11:20:44AM +0200, Marcin Juszkiewicz wrote:
> >> > For last few months I am working on fixing Linaro binary cross
> >> > toolchains and their support in OpenEmbedded. Got to point when they
> >> > work (both AArch64 and ARMv7a ones) for single packages but problem
> >> > starts when I want to create image...
> >>
> >> Today I got different king of issue with external toolchain.
> >>
> >> systemd is using AC_PATH_TOOL(OBJCOPY, objcopy)
> >> but host prefix in OE is not the same as in binary toolchain (different
> >> TARGET_VENDOR)
> >> so it looks for configure:14545: checking for
> >> arm-foo-linux-gnueabi-objcopy
> >> while binary toolchain has only
> >> arm-bar-linux-gnueabi-objcopy
> >>
> >> and because arm-foo-linux-gnueabi-objcopy wasn't found it continues:
> >> configure:14588: checking for objcopy
> >> configure:14606: found /usr/bin/objcopy
> >> and bam a lot later when it tries objcopy from host on some arm lib
> >>
> >> Interesting that systemd is first recipe in our image where I've noticed
> >> issues like this
> >>
> >> Any idea how to easily resolve this without checking every configure.ac
> >> how it's looking for e.g. objcopy?
> >
> >
> > export OBJCOPY in the environment to the one based on TARGET_PREFIX rather
> > than TARGET_SYS, and it'll use that.
> > --
> > Christopher Larson
> >

-- 
Martin 'JaMa' Jansa     jabber: Martin.Jansa at gmail.com
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