external_pkg_dirs ================= Test application for the EXTERNAL_PKG_DIRS feature of the buildsystem. Two external packages are provided in `external_pkgs/`: `external_pkg` and `external_pkg_not_used`. If the first package is not properly included, a define from `CFLAGS` is missing and a precompiler error is triggered. If the second package somehow ends up included it triggers a makefile error. Usage ===== Set `EXTERNAL_PKG_DIRS` inside Makefile to point to other paths where the buildsystem can look for packages. Similar functionality to `EXTERNAL_PKG_DIRS`. Be careful to not name these externally provided packages the same as existing packages in `$(RIOTBASE)/pkg/`.