I would like to be able to call the InnoSetup Compiler with Options for the InnoSetup Preprocessor. I have a unique setup that is used to compile 6 packages that relies heavily on the the InnoSetup Preprocessor.
I found a workaround by calling a batch file that calls the InnoSetup Compiler Executable with proper parameters but I miss the "show progress" feature ;-)
Another workaround, which I use, is to add a few Text Replace steps ahead of the InnoSetup build, and create a temporary ISS file with the preprocessor variables replaced by the wanted values. I surround each replacement target with vertical bars, e.g. "|NAME|", to make them easier to find in the text replace. I would probably continue to do this even if a feature was added to FB to handle preprocessor variables!