setup: Use `-P' option when preprocessing.

This avoids adding `#' lines and eating trailing `\' continuation
markers.

diff --git a/setup b/setup
index 2b2ead2ba5e20d8c81e44373f3b0aa70c5455578..6504cbb30e755e7036b50d909da9b9c6ad7cae24 100755 (executable)
--- a/setup
+++ b/setup
@@ -190,7 +190,7 @@ for c in $cppfiles; do
   ft=$HOME$sub/$target
   dir=${ft%/*}
   mkdir -p $dir
-  cpp dot/$c -o $ft.new
+  cpp -P dot/$c -o $ft.new
   mv $ft.new $ft
   echo "  $target"
 done