cmake: warn if inconsistency between CMAKE_SOURCE_DIR and ZEPHYR_BASE
cmake has a number of issues dealing with symbolic links:
https://gitlab.kitware.com/cmake/cmake/issues/16228
One of them can cause cmake to rewrite the -S input from the user and
CMAKE_SOURCE_DIR to unexpectedly include symbolic links:
https://cmake.org/pipermail/cmake/2019-May/thread.html#69496
Catch this corner case and warn about subtle issues like breaking
-fmacro-prefix-map=${ZEPHYR_BASE}=
Sample warning message:
CMake Warning at ../../CMakeLists.txt:30 (message):
ZEPHYR_BASE doesn't match CMAKE_CURRENT_SOURCE_DIR
ZEPHYR_BASE = ~/zephyrproject/zephyr
PWD = ~/westsymlink/zephyr/samples/hello_world
CMAKE_CURRENT_SOURCE_DIR = ~/westsymlink/zephyr
You may be using a mix of symbolic links and real paths which causes
subtle and hard to debug CMake issues.
Signed-off-by: Marc Herbert <marc.herbert@intel.com>
2 files changed
