Using Properocessors with GPS

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Dear all,

i am using preprocessors in the build process of some Ada application.
With normal make this is no problem, but with the project file system
of GNAT which is used by GPS this is a problem.

The only solution i am seeing in the moment is to call a normal
make file for building within GPS. Or is there any better way
of doing this?


Regards
   M.Erdmann
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