+# If there is no system-supplied POSIX regex library, use our own
+ifneq "$(HavePosixRegex)" "YES"
+# Make sure we can get hold of regex.h
+SRC_HC_OPTS += -Icbits/regex
+SRC_HSC2HS_OPTS += -Icbits/regex
+endif
+
+# -----------------------------------------------------------------------------
+# Per-module flags
+
+# ESSENTIAL, for getting reasonable performance from the I/O library:
+SRC_HC_OPTS += -funbox-strict-fields