Prevent change of spacing

[agners]

When trying to reuse the simplecpp for device tree it turns out that simplecpp changes spacing such that the output can't be read by the device tree compiler. simplepcc inserts a space between the ampersand and the label, such that they can not be read by dtc, e.g. & gpio).

It would be nice to have an option which preserves spaces as much as possible.

[danmar]

how do you use simplecpp? on the command line like this:

simplecpp 1.c

?

I would personally prefer that you use the token list output instead but that might be more complex for you. you then have to write a c++ program (you can just tweak simplecpp/main.cpp) that uses simplecpp.

[danmar]

I think that we want to have 2 different behaviors. For debugging I want to see what tokens are created so I want to have the extra space. Users do not want to have extra spaces. So I need to add some debug flag that I can use.

If you want to try to fix this the feel free to look at it. I believe that you can just tweak simplecpp::TokenList::stringify in simplecpp.cpp.

[agners]

I try to use it as drop in replacement for GCC's preprocessor to preprocess Linux kernel device trees. The GCC command looks like this:

cpp -nostdinc -x assembler-with-cpp -I../linux/include/ -o output.dts.tmp input.dts

The simplecpp command looks like this:

simplecpp -D__DTS__ -I../linux/include/ input.dts > output.dts.tmp

[danmar]

Why not use gcc? The text output is for debugging purposes. It is tricky to get the spacing exactly as gcc and I rather not worry about if the debug output is exactly like gcc or not.

[danmar]

To me this is currently a low prio issue.