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classes/kernel: check OLDEST_KERNEL at configure time

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If the kernel being built is older than OLDEST_KERNEL and we're building
with glibc, then the C library we're building is probably not going to
be compatible with the kernel and we should warn the user. (This is
easier to do here rather than when building glibc, because we don't
necessarily have the information we need to determine the kernel version
there, whereas we do here.)

Fixes [YOCTO #8653].

(From OE-Core rev: 2e66f57febe85a63ce2ab98eaf6318d47eb60939)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Paul Eggleton
2016-05-09 16:43:31 +12:00
committed by Richard Purdie
parent 02587c4bad
commit 55159ef056
1 changed files with 14 additions and 0 deletions
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meta/classes/kernel.bbclass
+14
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@@ -326,6 +326,20 @@ sysroot_stage_all () {
KERNEL_CONFIG_COMMAND ?= "oe_runmake_call -C ${S} O=${B} oldnoconfig || yes '' | oe_runmake -C ${S} O=${B} oldconfig"
python check_oldest_kernel() {
oldest_kernel = d.getVar('OLDEST_KERNEL', True)
kernel_version = d.getVar('KERNEL_VERSION', True)
tclibc = d.getVar('TCLIBC', True)
if tclibc == 'glibc':
kernel_version = kernel_version.split('-', 1)[0]
if oldest_kernel and kernel_version:
if bb.utils.vercmp_string(kernel_version, oldest_kernel) < 0:
bb.warn('%s: OLDEST_KERNEL is "%s" but the version of the kernel you are building is "%s" - therefore %s as built may not be compatible with this kernel. Either set OLDEST_KERNEL to an older version, or build a newer kernel.' % (d.getVar('PN', True), oldest_kernel, kernel_version, tclibc))
}
check_oldest_kernel[vardepsexclude] += "OLDEST_KERNEL KERNEL_VERSION"
do_configure[prefuncs] += "check_oldest_kernel"
kernel_do_configure() {
# fixes extra + in /lib/modules/2.6.37+
# $ scripts/setlocalversion . => +