[oe] Prebuilt toolchains

[Gary Thomas]

On 11/17/2009 12:34 AM, Koen Kooi wrote:
> On 11-11-09 18:00, Gary Thomas wrote:
>> I'd like to use my own toolchains when building OpenEmbedded.
>> I've tried to follow the information at:
>> http://docs.openembedded.org/usermanual/usermanual.html#commonuse_prebuilt_toolchain
>>
>>
>> It's a bit terse and confusing, so I'm just trying to see
>> what I need (I think the section tries to discuss too many
>> concepts at once)
>
> If you're using angstrom and want to use a prebuilt CSL toolchain, you
> only need to add this to local.conf (I suspect thunderbird will linewrap
> it):
>
> # Black magic to automatically set SDK_PATH out of PATH - don't touch this!
> # Works with pretty much any external toolchain, like CS Lite or MV Pro 5
> # Handles cross-toolchain vs. native toolchain
> # SDK_PATH can be overwritten externally by META_SDK_PATH, e.g. for SDK
> TOOLCHAIN_SYSPATH = "${@bb.data.getVar('TARGET_ARCH', d, 1) !=
> bb.data.getVar('BUILD_ARCH', d, 1) and
> os.path.abspath(os.path.dirname(bb.which(bb.data.getVar('PATH', d, 1),
> bb.data.getVar('TARGET_PREFIX', d,
> 1)+'cpp'))+'/../'+bb.data.getVar('TARGET_SYS', d, 1)) or ''}"
> TOOLCHAIN_PATH = "${@bool(bb.data.getVar('TOOLCHAIN_SYSPATH', d, 1)) and
> (os.path.exists(bb.data.getVar('TOOLCHAIN_SYSPATH', d, 1)) and
> os.path.dirname(bb.data.getVar('TOOLCHAIN_SYSPATH', d, 1)) or
> bb.fatal('No valid toolchain in PATH')) or ''}"
> SDK_PATH = "${@[bb.data.getVar('TOOLCHAIN_PATH', d, 1),
> bb.data.getVar('META_SDK_PATH', d,
> 1)][bool(bb.data.getVar('META_SDK_PATH', d, 1))]}"
>
> # Set the necessary variables to use binary CodeSourcery Lite
> TARGET_VENDOR = "-none"
> TARGET_CPPFLAGS_append = " -I${SDK_PATH}/${TARGET_SYS}/libc/usr/include "
> TARGET_LDFLAGS_prepend = " -L${SDK_PATH}/${TARGET_SYS}/libc/lib
> -Wl,-rpath-link,${SDK_PATH}/${TARGET_SYS}/libc/lib "
> TOOLCHAIN_TYPE = "external"
> TOOLCHAIN_BRAND = "csl"

Thanks, this looks like something to try.

I'm having a bit of trouble with the setting of 'TOOLCHAIN_SYSPATH'
(my toolchain is home-grown. not CSL).  Is there some way to debug this
line, e.g. print out the components and results?

-- 
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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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