Fortunately, there are only ~3 uses of absolute source files in the whole system. The most frequent is webversion.js. In this particular instance, the rewritten rule will actually copy the absolute file to the place the callee originally expected it be placed. (e.g., when copying /home/peitschie/Source/webodf/webversion.js to ${CURRENT_BINARY_DIR}, it is unexpected to see this particular file show up in ${CURRENT_BINARY_DIR}/home/peitschie/Source/webodf/webversion.js).

So yes, this is a functional change, but all places that depend on absolute files being copied around cope *better* with this change.