[Scons-dev] Builder issue

[Neven Klacar]

Hi, trying to make a builder that takes source file
a.c and creates a new C file, a_altered.c using a python script or program
that in this example will be preprocess lets say.

Then I want to pass the altered file to be built in normal workflow

newfile=MyBuilder("a.c")
object=env.Object(newFile)
env.Library(object)
....

In the builder I created a an emitter which modifies the target files to
have a different name.
*Builder*
def generate(env):
   my_bld = env.Builder(action = 'preprocess< $SOURCE > $TARGET'
,
                               source_scanner = SCons.Scanner.C.CScanner(),
                               emitter = my_emitter,
                               suffix = '.c2', src_suffix = '.c')

    env.Append(BUILDERS = {'MyBuilder' : my_bld})



def my_emitter(target, source, env):

   for t in target:

      t.name=t.name[:t.name.rfind('.')]+'_altered.c'

   return (target,source)



The basic error I get is that there seems to be two ways to build the same
file

.../project/build/objects/a_altered.c failed: Multiple ways to build the
same target were specified for: ...project/build/objects/a_altered.c  (from
['.../project/src/a.c'] and from ['.../project/src/a.c'])



Am I going about this the right way?


I appreciate any help or suggestions!


Thanks,

Neven
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