Don't declare pigweed variables as globals
Require targets to explicitly import pigweed variable definitions. This
moves out some necessary logic from the BUILDCONFIG.gn file.
Change-Id: If9c9fe5a680cc9d897a0e8a55889873be618ed84
diff --git a/pw_sys_io_baremetal_stm32f429/BUILD.gn b/pw_sys_io_baremetal_stm32f429/BUILD.gn
index f2f4bcc..f1d9466 100644
--- a/pw_sys_io_baremetal_stm32f429/BUILD.gn
+++ b/pw_sys_io_baremetal_stm32f429/BUILD.gn
@@ -12,6 +12,10 @@
# License for the specific language governing permissions and limitations under
# the License.
+# gn-format disable
+import("//build_overrides/pigweed.gni")
+
+import("$dir_pigweed/legacy_target.gni")
import("$dir_pw_build/target_types.gni")
import("$dir_pw_docgen/docs.gni")