[Scons-users] Out of tree build getting "Source directory cannot be under variant directory" error

[ethan09]

On Thu, Aug 23, 2012 at 1:27 PM, Evan Driscoll <driscoll at cs.wisc.edu> wrote:

> On 08/23/2012 03:21 PM, ethan09 wrote:

>> $ cat SConstruct

>> import os

>> vdir = os.getcwdu()

>> VariantDir(vdir, 'src')

>>

>> ...

>>

>> $ cd /home/users/<myid>/tmp/  # an empty directory

>> $ scons -f ../src/proj/SConstruct

>

> I haven't actually tried this, but I'm pretty sure that in this case,

> os.getcwdu() will *not* return your ~/<mvid>/tmp directory. Before

> reading an SConscript (including SConstruct), SCons chdirs to the

> directory that SConscript is in. Thus you're trying to set the bulid

> directory to src/proj.


Maybe this is the correct behavior, but I did try print what is
returned from os.getcwdu() and find it identical my launchdir. I am
using an old version on Ubuntu:

$ scons -v
SCons by Steven Knight et al.:
        script: v2.0.1.r5134, 2010/08/16 23:02:40, by bdeegan on cooldog
        engine: v2.0.1.r5134, 2010/08/16 23:02:40, by bdeegan on cooldog


> Try GetLaunchDir() instead: "Returns the absolute path name of the

> directory from which scons was initially invoked. This can be useful

> when using the -u, -U or -D options, which internally change to the

> directory in which the SConstruct file is found."


Thanks for the tip on GetLaunchDir() that I previously did not know about.
However changing os.getcwdu() to GetLaunchDir() didn't help my case.
The error message remains the same.
My worry is that SCons regards variant_dirs that is completely
detached from src_dir, as actually above the src dir.


>

> Evan


Thanks,
EW