[OE-core] [RFC] glibc kernel version

[Khem Raj]

> On Nov 24, 2015, at 9:29 AM, Jonathan David <jonathan.david at ni.com> wrote:
> 
> The change below only replaces the kernel version checked by the shar
> file, so that machines running on the 2.6 kernel can unpack an SDK
> archive; however, the SDK will be unusable if the bundled glibc requires a later kernel than what is installed. glibc's minimal kernel version is determined by OLDEST_KERNEL, which from testing does not appear to be influenced by SDK_OLDEST_KERNEL.
> 
> For example, setting OLDEST_KERNEL=3.14 and SDK_OLDEST_KERNEL=2.6 still results in an unusable SDK on systems running [2.6, 3.14) kernels.
> 
> Is this a problem that many can expect to encounter, or is bumping the version of glibc beyond 2.6 uncommon?

We need to compile nativesdk components as well as nativesdk-glibc using this defined to 2.6.32 as well. otherwise it will have wrong assumptions about
system calls available to it during build ( 3.14 ) vs at runtime ( 2.6.32 ) and many nativesdk programs could fail to run properly. Please note that 2.22 needs 2.6.32
can’t go below that.

> 
> 
> commit: 522ba4c51fff53566678b2689d0d63c393e417b3
> populate_sdk_base: Fix aarch64 OLDEST_KERNEL sdk issues
> 
> --- a/meta/classes/populate_sdk_base.bbclass
> +++ b/meta/classes/populate_sdk_base.bbclass
> @@ -81,6 +81,11 @@ python write_host_sdk_manifest () {
> POPULATE_SDK_POST_TARGET_COMMAND_append = " write_target_sdk_manifest ; "
> POPULATE_SDK_POST_HOST_COMMAND_append = " write_host_sdk_manifest; "
> 
> +# Some archs override this, we need the nativesdk version
> +# turns out this is hard to get from the datastore due to
> TRANSLATED_TARGET_ARCH
> +# manipulation.
> +SDK_OLDEST_KERNEL = "2.6.32"
> +
> fakeroot python do_populate_sdk() {
> from oe.sdk import populate_sdk
> from oe.manifest import create_manifest, Manifest
> @@ -156,7 +161,7 @@ EOF
> sed -i -e 's#@SDK_ARCH@#${SDK_ARCH}#g' \
> -e 's#@SDKPATH@#${SDKPATH}#g' \
> -e 's#@SDKEXTPATH@#${SDKEXTPATH}#g' \
> - -e 's#@OLDEST_KERNEL@#${OLDEST_KERNEL}#g' \
> + -e 's#@OLDEST_KERNEL@#${SDK_OLDEST_KERNEL}#g' \
> -e 's#@REAL_MULTIMACH_TARGET_SYS@#${REAL_MULTIMACH_TARGET_SYS}#g' \
> -e 's#@SDK_TITLE@#${SDK_TITLE}#g' \
> -e 's#@SDK_VERSION@#${SDK_VERSION}#g' \
> 
> 
> --
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