[Scons-users] Has anyone seen anything like this

[Daniel Moody]

I created this PR https://github.com/SCons/scons/pull/4161 which should fix
the issue. I was able to build daos and repro with the issue described then
verify my changes fixed it. Feel free to verify independently.

On Wed, May 25, 2022 at 3:13 PM Bill Deegan <bill at baddogconsulting.com>
wrote:

> SConscript() with variant_dir is generally much easier to use correctly.
> (instead of explicit VariantDir(), which most people end up using
> incorrectly and then not getting the results they expect)
>
> As far as VariantDir() src and target dirs, you can have many but:
> 1. Avoid having the source of one include the target of another (including
> the current one) (recursion=messy and hard to unravel/understand). (Also do
> not chain VariantDirs()   VariantDir('b','a') VariantDir('c','b') == BAD)
> 2. If you're using VariantDir() you need to address all the sources and
> targets as if they were in the target dir. (you can avoid this if you use
> the SConscript() form.)
> 3. Avoid writing files into the sources of variant dirs during the build.
> There are known issues where such updates may not cause a rebuild of
> targets which depend on such files.
>
> -Bill
>
> On Wed, May 25, 2022 at 11:38 AM Mats Wichmann <mats at wichmann.us> wrote:
>
>> On 5/25/22 12:24, Olivier, Jeffrey V wrote:
>> > I've worked around the problem for now.  On your comment about the
>> > VariantDir, can you have more than one?  For example, something like
>> >
>> > VariantDir("{}/src".format(build_prefix), 'src', duplicate=0)
>> > # Execute SConscripts in this path
>> >
>> > VariantDir("{}/utils".format(build_prefix), 'utils', duplicate=0)
>> > # Execute SConscripts in this path
>>
>> You can have many VariantDir mappings. You can have many VariantDir
>> mappings to the same source, if you like, though each variant dir must
>> be unique.
>>
>> We'd usually suggest you explore writing the above using this style
>> instead, but of course you have to do what's fit for purpose (have not
>> examined your repo):
>>
>> SConcript('src/SConscript', variant_dir="build/src", duplicate=0)
>> SConcript('utils/SConscript', variant_dir="build/utils", duplicate=0)
>>
>>
>>
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