Currently, whenever CMake is reconfigured, config_gen.py will always
regenerate the output config header and json, forcing a timestamp
update and a rebuild. This change adds a --skip-unchanged option which
skips writing to the output file if the write would not change the
file's contents. The default is off to avoid breaking builds that rely
on the existing behavior of always overwriting.
Signed-off-by: James Martin <fennelfoxxo@gmail.com>
e8094340a3