[Scons-users] Export command and CPPPATH concatenation

[Dirk Bächle]

Hi Laurent,

On 31.01.2014 22:30, Laurent wrote:

> Hello,

>

> I recently discover a rather strange behavior of scons using the 

> Export/Import mechanism for sharing Environment between two 

> SConstruct. I appears that the CPPPATH is appended with the build 

> directory but as a string and not as an array resulting in incorrect 

> include paths.

>

> Here is an example:

>

> [...]

>

> Why is scons appending the CPPPATH defined in the SConstruct as a 

> string (resulting in './A/A/B') in the SConscript and not as a list 

> (resulting in ['./A', './A/B']) ? Is this the regular behavior of scons ?

>


in your example I don't see where you try to add "./A" to CPPPATH. 
Please check, and repost your sources if necessary.
 From your description I can only guess that you wrote something like

   env = Environment(CPPPATH='./A', ...)

which sets CPPPATH to a string. Then, if you later try to add your 
"[./A/B]" the AppendUnique() automatically converts the list to a string 
and appends it (because it is already a string, the new values get 
converted to match).
When specifying path variables you should always use list notation:

   env = Environment(CPPPATH=['./A'])

Please also have a look at the thread

http://four.pairlist.net/pipermail/scons-users/2013-September/001713.html


Best regards,

Dirk

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