+/*
+ * Use SRD_API to mark public API symbols, and SRD_PRIV for private symbols.
+ *
+ * Variables and functions marked 'static' are private already and don't
+ * need SR_PRIV. However, functions which are not static (because they need
+ * to be used in other libsigrokdecode-internal files) but are also not
+ * meant to be part of the public libsigrokdecode API, must use SRD_PRIV.
+ *
+ * This uses the 'visibility' feature of gcc (requires gcc >= 4.0).
+ *
+ * Details: http://gcc.gnu.org/wiki/Visibility
+ */
+
+/* Marks public libsigrokdecode API symbols. */
+#define SRD_API __attribute__((visibility("default")))
+
+/* Marks private, non-public libsigrokdecode symbols (not part of the API). */
+#define SRD_PRIV __attribute__((visibility("hidden")))
+
+/*
+ * When adding an output type, don't forget to...
+ * - expose it to PDs in controller.c:PyInit_sigrokdecode()
+ * - add a check in module_sigrokdecode.c:Decoder_put()
+ * - add a debug string in type_decoder.c:OUTPUT_TYPES
+ */