+# Some versions of SWIG (like 3.0.12) generate code where a parameter called
+# `swig_this` shadows a global of the same name. Later versions (like 4.0.1)
+# have renamed this global to `Swig_This_global`.
+#
+# Disable -Wshadow for that file.
+WARN_CFLAGS = -Wno-shadow
+