openwrt-packages-dist/utils/sane-backends/patches/020-fix_pieusb.patch

--- a/backend/pieusb_buffer.c
+++ b/backend/pieusb_buffer.c
@@ -104,11 +104,13 @@
 
 /* When creating the release backend, make complains about unresolved external
  * le16toh, although it finds the include <endian.h> */
+#ifndef le16toh
 #if __BYTE_ORDER == __LITTLE_ENDIAN
  #define le16toh(x) (x)
 #else
  #define le16toh(x) __bswap_16 (x)
 #endif
+#endif
 
 static void buffer_update_read_index(struct Pieusb_Read_Buffer* buffer, int increment);