#yocto #sdk How to add *-dev packages to sdk installer and not to target rootfs

#yocto #sdk How to add *-dev packages to sdk installer and not to target rootfs

[hhj]

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We use the "standard" SDK to provide a basic linux filesystem including libraries  to be used for application development (based on cmake) in the SDK. So we need the *-dev packages for the libraries to be available in the target "sysroot" in the SDK but not in the target rootfs. How can this be configured?
BR's
Henrik

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Re: [yocto] #yocto #sdk How to add *-dev packages to sdk installer and not to target rootfs

[Khem Raj]

On Thu, Oct 1, 2020 at 11:58 PM <hhj@trackman.com> wrote:
>
> We use the "standard" SDK to provide a basic linux filesystem including libraries  to be used for application development (based on cmake) in the SDK. So we need the *-dev packages for the libraries to be available in the target "sysroot" in the SDK but not in the target rootfs. How can this be configured?

standard SDK can only build applications and it has -dev packages
included in it per your image ( if you built SDK with -cpopulate_sdk)
where does target rootfs come from ?

> BR's
> Henrik
> 
>

Re: [yocto] #yocto #sdk How to add *-dev packages to sdk installer and not to target rootfs

[hhj]

The target rootfs is the image which "-c populate_sdk" is build from. I have actually modified the populate_sdk recipe to include the rootfs in the sdk together with the sysroots for target and host. In this way the applications can be added to the rootfs to generate the complete fw for the device - we do not update applications with individual packages but as a complete image. Our rootfs is dd'ed to the partition and is read only for maximum reliability. 
It would be nice if *-dev packages could be specified to included in the sdk sysroots only since we do not need them in the taget rootfs.

-----Original Message-----
From: Khem Raj <raj.khem@gmail.com> 
Sent: Friday, 2 October 2020 19.28
To: Henrik Haugaard Jensen <hhj@trackman.com>
Cc: yocto@lists.yoctoproject.org
Subject: Re: [yocto] #yocto #sdk How to add *-dev packages to sdk installer and not to target rootfs

On Thu, Oct 1, 2020 at 11:58 PM <hhj@trackman.com> wrote:
>
> We use the "standard" SDK to provide a basic linux filesystem including libraries  to be used for application development (based on cmake) in the SDK. So we need the *-dev packages for the libraries to be available in the target "sysroot" in the SDK but not in the target rootfs. How can this be configured?

standard SDK can only build applications and it has -dev packages included in it per your image ( if you built SDK with -cpopulate_sdk) where does target rootfs come from ?

> BR's
> Henrik
> 
>

Re: [yocto] #yocto #sdk How to add *-dev packages to sdk installer and not to target rootfs

[Khem Raj]

Perhaps extensible SDK is a better fit for you when you are building
custom rootfs with SDK.

On Sun, Oct 4, 2020 at 11:18 PM Henrik Haugaard Jensen <hhj@trackman.com> wrote:
>
> The target rootfs is the image which "-c populate_sdk" is build from. I have actually modified the populate_sdk recipe to include the rootfs in the sdk together with the sysroots for target and host. In this way the applications can be added to the rootfs to generate the complete fw for the device - we do not update applications with individual packages but as a complete image. Our rootfs is dd'ed to the partition and is read only for maximum reliability.
> It would be nice if *-dev packages could be specified to included in the sdk sysroots only since we do not need them in the taget rootfs.
>
> -----Original Message-----
> From: Khem Raj <raj.khem@gmail.com>
> Sent: Friday, 2 October 2020 19.28
> To: Henrik Haugaard Jensen <hhj@trackman.com>
> Cc: yocto@lists.yoctoproject.org
> Subject: Re: [yocto] #yocto #sdk How to add *-dev packages to sdk installer and not to target rootfs
>
> On Thu, Oct 1, 2020 at 11:58 PM <hhj@trackman.com> wrote:
> >
> > We use the "standard" SDK to provide a basic linux filesystem including libraries  to be used for application development (based on cmake) in the SDK. So we need the *-dev packages for the libraries to be available in the target "sysroot" in the SDK but not in the target rootfs. How can this be configured?
>
> standard SDK can only build applications and it has -dev packages included in it per your image ( if you built SDK with -cpopulate_sdk) where does target rootfs come from ?
>
> > BR's
> > Henrik
> > 
> >

Re: [yocto] #yocto #sdk How to add *-dev packages to sdk installer and not to target rootfs

[Leon Woestenberg]

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Hello Henrik,

On Mon, Oct 5, 2020 at 8:18 AM Henrik Haugaard Jensen <hhj@trackman.com>
wrote:

>
> It would be nice if *-dev packages could be specified to included in the
> sdk sysroots only since we do not need them in the taget rootfs.
>
> As far as I known:
- The -dev packages do not end up in target rootfs, unless you specify them
in your target image.
- The -dev packages end up in the standard SDK target sysroot if you have a
DEPENDS on them.

So maybe in your case you do not have a DEPENDS in your image for the
packages you want a -dev for in SDK?
Could it be you specify -dev manually for the target image?

I am not sure what happens if "myapp" mentions a DEPENDS on (say) "libpng"
but not really links against it.
I am not sure if the libpng-dev ends up in the SDK (but I will try this
tomorrow).

Regards,

Leon.

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