+PSPP_ENABLE_OPTION([-Wall])
+PSPP_ENABLE_OPTION([-Wextra])
+PSPP_ENABLE_OPTION([-Wwrite-strings])
+PSPP_ENABLE_OPTION([-Wstrict-prototypes])
+PSPP_ENABLE_OPTION([-Wpointer-arith])
+PSPP_ENABLE_OPTION([-Wno-sign-compare])
+PSPP_ENABLE_OPTION([-Wmissing-prototypes])
+PSPP_ENABLE_OPTION([-Wc11-c2x-compat])