I talked with RP off the list and got this working.
Below is what I ended up doing to prevent the default packages from working with
baremetal, unless they were configured to.
In my baremetal distro.conf:
COMPATOS = ""
COMPATOS_class-target = ".*-linux${LIBCEXTENSION}${ABIEXTENSION}"
COMPATIBLE_HOST ?= "${COMPATOS}"
Then in each of the baremetal -only- recipes:
COMPATIBLE_HOST = ".*-elf"
COMPATIBLE_HOST_arm = "[^-]*-[^-]*-eabi"
In the recipes for BOTH baremetal and Linux:
COMPATIBLE_HOST = "${HOST_SYS}"
(Setting to "" should work as well..)
--Mark
On 3/26/20 12:05 PM, Mark Hatle wrote:
>> On Thu, 2020-03-26 at 10:25 -0500, Mark Hatle wrote:
>>> Add the ability to generate non-Linux based components, such as
>>> baremetal, FreeRTOS, Zypher, etc, exist. There is a need for a way
>>> to take components as specific to a given OS.
>>>
>>> This is especially important in a multiconfig build where you may be
>>> targeting different OSes which different sets of recipes in a common
>>> set of layers.
>>>
>>> Setting a default of (matching bitbake.conf's default TARGET_OS):
>>>
>>> COMPATIBLE_OS ?= "linux${LIBCEXTENSION}${ABIEXTENSION}"
>>>
>>> will allow all existing recipes to be tagged as Linux specific, so
>>> only non-Linux recipes would need to be tagged with specific
>>> compatibility.
>>>
>>> For a baremetal recipes, the following was used to test this code:
>>>
>>> COMPATIBLE_OS = "elf"
>>> COMPATIBLE_OS_arm = "eabi"
>>>
>>> Signed-off-by: Mark Hatle <[email protected]>
>>> ---
>>> V2:
>>> Only difference to V1 is typograhic fixes to the commit message.
>>>
>>> meta/classes/base.bbclass | 7 +++++++
>>> meta/conf/documentation.conf | 1 +
>>> 2 files changed, 8 insertions(+)
>>>
>>> diff --git a/meta/classes/base.bbclass b/meta/classes/base.bbclass
>>> index 45f9435fd8..c123c5dc50 100644
>>> --- a/meta/classes/base.bbclass
>>> +++ b/meta/classes/base.bbclass
>>> @@ -509,6 +509,13 @@ python () {
>>> d.setVarFlag('do_devshell', 'fakeroot', '1')
>>> d.appendVarFlag('do_devshell', 'depends', '
>>> virtual/fakeroot-native:do_populate_sysroot')
>>>
>>> + need_os = d.getVar('COMPATIBLE_OS')
>>> + if need_os and not d.getVar('PARSE_ALL_RECIPES', False):
>>> + import re
>>> + this_os = d.getVar('TARGET_OS')
>>> + if not re.match(need_os, this_os):
>>> + raise bb.parse.SkipRecipe("incompatible with os %s (not
>>> in COMPATIBLE_OS)" % this_os)
>>> +
>>> need_machine = d.getVar('COMPATIBLE_MACHINE')
>>> if need_machine and not d.getVar('PARSE_ALL_RECIPES', False):
>>> import re
>>> diff --git a/meta/conf/documentation.conf
>>> b/meta/conf/documentation.conf
>>> index 0b21d1f63e..7a87540f43 100644
>>> --- a/meta/conf/documentation.conf
>>> +++ b/meta/conf/documentation.conf
>>> @@ -111,6 +111,7 @@ COMBINED_FEATURES[doc] = "A set of features
>>> common between MACHINE_FEATURES and
>>> COMMON_LICENSE_DIR[doc] = "Points to meta/files/common-licenses in
>>> the Source Directory, which is where generic license files reside."
>>> COMPATIBLE_HOST[doc] = "A regular expression that resolves to one or
>>> more hosts (when the recipe is native) or one or more targets (when
>>> the recipe is non-native) with which a recipe is compatible."
>>
>> How does COMPATIBLE_OS compare to COMPATIBLE_HOST (documented above)?
>
> HOST_SYS="aarch64-oe-linux"
>
> So the equivalent to the COMPATIBLE_OS would be:
>
> COMPATIBLE_HOST ?= ".*-linux.*"
>
> So it COULD be used in most cases.
>
> When I tried this before though, I could get it to work in a multiconfig
> setting.
>
> Specifically what I tried was setting, in my local.conf:
>
> COMPATIBLE_HOST ?= ".*-linux${LIBCEXTENSION}${ABIEXTENSION}"
>
> And then in the recipes:
>
> COMPATIBLE_HOST = ".*-elf"
> COMPATIBLE_HOST_arm = ".*-eabi"
>
> But then the second one matches the linux ABIEXTENSION and broke..
>
> So really the issue is that I -only- ever want to match on the OS part of
> the "SYS" string. And done to the multiple natures of the '-', it's
> difficult to get right.
>
> I didn't try something complex like: [^-]-[^-]-eabi
>
> --Mark
>
>> Cheers
>>
>> Richard
>>
>
>
>
>
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