Jose Quaresma via lists.openembedded.org <quaresma.jose=
gmail....@lists.openembedded.org> escreveu no dia segunda, 20/11/2023 à(s)
17:17:
> Hi Adrian,
>
> Adrian Freihofer <adrian.freiho...@gmail.com> escreveu no dia segunda,
> 20/11/2023 à(s) 14:46:
>
>> Provide an easy way to enable cmake-qemu e.g. on distro level for all
>> recipes inheriting the cmake.bbclass.
>>
>> Therefore a new variable is introduced: OECMAKE_EXEWRAPPER_QEMU.
>>
>> If set to "1" all recipes built with CMake can use qemu to execute
>> cross-compiled binaries on the build machine.
>> One use case is the execution of cross-compiled unit tests or ptests,
>> e.g. in an SDK context. Therefore, a variable that activates Qemu for
>> all CMake recipes is much more useful than just providing the optional
>> cmake-qemu.bbclass.
>> Further information can be found in the CMake documentation in the
>> CMAKE_CROSSCOMPILING_EMULATOR section.
>>
>> There are some use cases for qemu-user, but users should not be
>> encouraged to use it as an alternative for clean cross-compilation.
>> Since the core does not need it either it is optional.
>>
>
> Are you sure this works in the majority of scenarios?
> Last time I worked on this qemu user mode failed to run
> multithreading applications.
>
Sorry, I was wrong above.
The issue was not multithreading but with the fork system call.
>
> Jose
>
>
>> Signed-off-by: Adrian Freihofer <adrian.freiho...@siemens.com>
>> ---
>> meta/classes-recipe/cmake.bbclass | 4 ++++
>> 1 file changed, 4 insertions(+)
>>
>> diff --git a/meta/classes-recipe/cmake.bbclass
>> b/meta/classes-recipe/cmake.bbclass
>> index d978b88944..4d8e2a206f 100644
>> --- a/meta/classes-recipe/cmake.bbclass
>> +++ b/meta/classes-recipe/cmake.bbclass
>> @@ -14,6 +14,10 @@ B = "${WORKDIR}/build"
>> # The supported options are "Unix Makefiles" or "Ninja".
>> OECMAKE_GENERATOR ?= "Ninja"
>>
>> +# qemu-user can be used for special use cases, but not by default
>> +OECMAKE_EXEWRAPPER_QEMU ??= "0"
>> +inherit ${@'cmake-qemu' if d.getVar('OECMAKE_EXEWRAPPER_QEMU') else ''}
>> +
>> python() {
>> generator = d.getVar("OECMAKE_GENERATOR")
>> if "Unix Makefiles" in generator:
>> --
>> 2.41.0
>>
>>
>>
>>
>>
>
> --
> Best regards,
>
> José Quaresma
>
>
>
>
--
Best regards,
José Quaresma
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