[LEDE-DEV] Identifying kernel version (major) during build (.mk file)
openwrt at ezplanet.net
Sun Feb 19 03:50:39 PST 2017
Thanks to those who provided directions.
I will settle with checking on LINUX_3_18.
I am not sure who manages build variables, but in future it would be
useful to be able to identify which kernel major version we are building
On 18/02/17 20:51, Magnus Kroken wrote:
> Hi Mauro
> On 18.02.2017 12.49, Mauro Mozzarelli wrote:
>> So far with trial and error (unfortunately I could not find specific
>> documentation) I found that I can test reliably a variable that includes
>> both kernel version and patchlevel as follows:
>> However all I would need is something like LINUX_4 or LINUX_3
> At this point, the only supported 3.x kernel is 3.18 (LINUX_3_18),
> everything else is 4.x. With a recent tree, you should be able to
> depend on LINUX_3_18 to select your 3.x configuration, and depend on
> !LINUX_3_18 (not 3.18) to select your 4.x configuration. Unless you
> need this to work with old trees when several 3.x kernels were in the
> tree, this should be sufficient.
> If you have to support multiple 3.x kernels, you could list all the
> 3.x patchlevels that have been in tree at some point, as that is a
> finite and known list. Unless you need to support *very* old trees
> with 2.6 kernels, that should have you covered.
> The OpenWrt wiki refers to symbols named LINUX_3_X, which presumably
> is what you're after, 3.x. I can't find this in the LEDE wiki, and I
> can't figure out where LINUX_* symbols are defined, so I don't know if
> those will still work, but you could try and see what happens.
>> Thank you in advance,
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