[Scons-users] Overriding Object to force global dependency

[Greg Ward]

[my original question from last week]

> I want to force every single *.o file in my build to artificially

> depend on something. (We have a homebrew tool that downloads and

> unpacks specific versions of all third-party dependencies -- GCC,

> C/C++ libraries, Java libraries, etc. This tool must run first, and

> everything else should depend on its output.)


On 29 June 2012, Pawel Tomulik said:

> It may be possible to use emitter for your purpose, I think.

> Dee API docs for SCons.Builder.BuilderBase, especially add_emitter()

> method. Try something like:

> 

> def my_emitter(target, source, env):

>     env.Depends(target, 'foo.txt')

>     return target, source

> 

> env = Environment()

> 

> env['BUILDERS']['StaticObject'].add_emitter('.c', my_emitter)

> ob = env.Object('a.c')


Awesome! That worked perfectly right out of the gate. 

Many thanks --

       Greg