#
# * `CFG_ENABLE_VALGRIND=1` - Run tests under valgrind
# * `VALGRIND_COMPILE=1` - Run the compiler itself under valgrind
-# (may require `CFG_ENABLE_VALGRIND`)
+# (requires `CFG_ENABLE_VALGRIND`)
#
# * `NO_REBUILD=1` - Don't rebootstrap when testing std
# (and possibly other crates)
#
# Admittedly this is a little convoluted.
#
+# If you find yourself working on the make infrastructure itself, and trying to
+# find the value of a given variable after expansion, you can use:
+#
+# make print-VARIABLE_NAME
+#
+# To extract it
+#
# </nitty-gritty>
#