API: add a macro for marking deprecated functions

We want to deprecate the badly designed event loop functions. Introduce
a macro that allows marking API routines as deprecated.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>

diff --git a/include/gpiod.h b/include/gpiod.h
index 513b9e73dd4c38459852c0cc4d38a7b10a644123..727246212ff7c958ddd74421bd9cdc069ff153da 100644 (file)
--- a/include/gpiod.h
+++ b/include/gpiod.h
@@ -69,6 +69,11 @@ struct gpiod_line_bulk;
  */
 #define GPIOD_BIT(nr)          (1UL << (nr))
 
+/**
+ * @brief Marks a public function as deprecated.
+ */
+#define GPIOD_DEPRECATED       __attribute__((deprecated))
+
 /**
  * @}
  *