[Buildroot] CCACHE accross multiple buildroot projects

[Buildroot] CCACHE accross multiple buildroot projects

[Heiko Thiery]

Hi,

is it allowed to use CCACHE accross several projects (all the same
architecture)?

--
Heiko

[Buildroot] CCACHE accross multiple buildroot projects

[Yann E. MORIN]

Heiko, All,

On 2017-06-19 15:57 +0200, Heiko Thiery spake thusly:
> is it allowed to use CCACHE accross several projects (all the same
> architecture)?

Normally, ccache hashes a few things to ensure that it does not re-use
incompatible obkects. It should be safe.

Regards,
Yann E. MORIN.

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[Buildroot] CCACHE accross multiple buildroot projects

[Adrian Perez de Castro]

On Tue, 20 Jun 2017 18:04:12 +0200, "Yann E. MORIN" <yann.morin.1998@free.fr> wrote:
> Heiko, All,
> 
> On 2017-06-19 15:57 +0200, Heiko Thiery spake thusly:
> > is it allowed to use CCACHE accross several projects (all the same
> > architecture)?
> 
> Normally, ccache hashes a few things to ensure that it does not re-use
> incompatible obkects. It should be safe.

It is, I routinely find myself having 3-4 different Buildroot work trees, all
pointing ccache to the same directory in the file system. If you target the
same architecture in more than one work tree, builds can sometimes be faster
when the same versions of the same files are used by different work trees.

Cheers,

--
 Adri?n ?
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[Buildroot] CCACHE accross multiple buildroot projects

[Heiko Thiery]

Meanwhile I figured out a stange issue. I have 4 different buildroot
projects with different workspaces but all of them use the same ccache
directory. These workspaces are cleaned in a scheduled interval. Then
it can happen that a new build will fail because of some pathes in
dependency files are pointing to files in other a cleaned workspace.

2017-06-20 19:21 GMT+02:00 Adrian Perez de Castro <aperez@igalia.com>:
> On Tue, 20 Jun 2017 18:04:12 +0200, "Yann E. MORIN" <yann.morin.1998@free.fr> wrote:
>> Heiko, All,
>>
>> On 2017-06-19 15:57 +0200, Heiko Thiery spake thusly:
>> > is it allowed to use CCACHE accross several projects (all the same
>> > architecture)?
>>
>> Normally, ccache hashes a few things to ensure that it does not re-use
>> incompatible obkects. It should be safe.
>
> It is, I routinely find myself having 3-4 different Buildroot work trees, all
> pointing ccache to the same directory in the file system. If you target the
> same architecture in more than one work tree, builds can sometimes be faster
> when the same versions of the same files are used by different work trees.
>
> Cheers,
>
> --
>  Adri?n ?