#yocto llvm support

#yocto llvm support

[Monsees, Steven C (US)]

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Under ../poky/meta/recipes-devtools the is "llvm"...

Devtool search <component>
Devtool sdk-install <component>

Will add this component to my EXT SDK...

Is this a fully functional llvm drop ?,
(i.e. is it compatible with meta-clang?, and can I use them together to build 3rd party extensions for my platform ?)

Is it better to add supported components this way rather than building them in directly to EXT SDK ?

Thanks,
Steve

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Re: #yocto llvm support

[Anton Antonov]

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Hi Steven,

I used meta-clang in my recipes and I noticed that:
1. The current release of poky uses LLVM v11.1.0 by default (poky/meta/recipes-devtools/llvm/llvm_git.bb)
2. Meta-clang requires LLVM v12.0.0 (meta-clang/conf/layer.conf defines LLVMVERSION = "12.0.0")

As a result just including meta-clang into bblayers.conf will require bitbake to build a new version of LLVM and rebuild everything which uses it

Anton

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Re: [yocto] #yocto llvm support

[Monsees, Steven C (US)]

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I noticed similar behavior...

I am running zeus 3.0.4, "devtool sdk-install llvm" will get llvm 8.0.1...

When I build meta-clang, and I set TOOLCHAIN?="clang" in local.conf it appears to grab llvm-project-source-9.0.1-9.0.1...

From: yocto@lists.yoctoproject.org <yocto@lists.yoctoproject.org> On Behalf Of Anton Antonov
Sent: Tuesday, April 20, 2021 9:51 AM
To: yocto@lists.yoctoproject.org
Subject: Re: [yocto] #yocto llvm support

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Hi Steven,

  I used meta-clang in my recipes and I noticed that:
1. The current release of poky uses LLVM v11.1.0 by default (poky/meta/recipes-devtools/llvm/llvm_git.bb)
2. Meta-clang requires LLVM v12.0.0 (meta-clang/conf/layer.conf defines LLVMVERSION = "12.0.0")

As a result just including meta-clang into bblayers.conf will require bitbake to build a new version of LLVM and rebuild everything which uses it

Anton

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Re: [yocto] #yocto llvm support

[Khem Raj]

On 4/20/21 7:00 AM, Monsees, Steven C (US) via lists.yoctoproject.org wrote:
> I noticed similar behavior…
> 
> I am running zeus 3.0.4, “devtool sdk-install llvm” will get llvm 8.0.1…
> 
> When I build meta-clang, and I set TOOLCHAIN?=”clang” in local.conf it 
> appears to grab llvm-project-source-9.0.1-9.0.1…
> 

this is intentional, when you use meta-clang, then llvm is preferred 
from LLVM since them we have consistent version of llvm for clang and 
others.

> *From:*yocto@lists.yoctoproject.org <yocto@lists.yoctoproject.org> *On 
> Behalf Of *Anton Antonov
> *Sent:* Tuesday, April 20, 2021 9:51 AM
> *To:* yocto@lists.yoctoproject.org
> *Subject:* Re: [yocto] #yocto llvm support
> 
> *_External Email Alert_*
> 
> *This email has been sent from an account outside of the BAE Systems 
> network.*
> 
> Please treat the email with caution, especially if you are requested to 
> click on a link, decrypt/open an attachment, or enable macros.  For 
> further information on how to spot phishing, access “Cybersecurity 
> OneSpace Page” and report phishing by clicking the button “Report 
> Phishing” on the Outlook toolbar.
> 
> 
> Hi Steven,
> 
>    I used meta-clang in my recipes and I noticed that:
> 1. The current release of poky uses LLVM v11.1.0 by default 
> (poky/meta/recipes-devtools/llvm/llvm_git.bb)
> 2. Meta-clang requires LLVM v12.0.0 (meta-clang/conf/layer.conf defines 
> LLVMVERSION = "12.0.0")
> 
> As a result just including meta-clang into bblayers.conf will require 
> bitbake to build a new version of LLVM and rebuild everything which uses it
> 
> Anton
> 
> 
> 
> 
>