[Scons-users] Variables 'Update' not adding variables to environment?

[William Blevins]

Please see the User's Guide for information regarding this topic:
http://www.scons.org/doc/HTML/scons-user/ch10s02.html

Here is a snippet:

vars = Variables(None, ARGUMENTS)
vars.Add('RELEASE', 'Set to 1 to build for release', 0)
env = Environment(variables = vars)


On Mon, Jan 25, 2016 at 8:56 AM, James Ramm <James.Ramm at jbarisk.com> wrote:

> Hi
>
> I have the following in my SConstruct:
>
>
>
>     opts = Variables()
>
>     opts.AddVariables(
>
>         PathVariable('GDAL_INCLUDES', 'search path for gdal include files'
> ,'/usr/local/include', PathVariable.PathAccept),
>
>         BoolVariable('DEBUG', 'compile in debug mode', 'False'),
>
>     )
>
>
>
>     env = Environment()
>
>     opts.Update(env)
>

I'm not sure what update does off the top of my head, but this isn't how
the User's Guide shows the interaction of Variable and Environment. Try
doing it the way that is shown in the User's Guide and see if that works. I
will look at the Update function.


>
>
> If I then `print env['GDAL_INCLUDES']` I get a key error:
>
>
>
>     KeyError: 'GDAL_INCLUDES':
>
>       File "…/SConstruct", line 69:
>
>         print env['GDAL_INCLUDES']
>
>       File "/usr/lib/scons/SCons/Environment.py", line 413:
>
>         return self._dict[key]
>
>
>
>
>
> I can, however, do `print env['DEBUG']` and it correctly writes `False`
>
>
>
> Any idea whats going on?
>
>
>
>
>
> Thanks
>
> *James Ramm*
>
> *Software Developer*
>
>
>
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